Why no pistol caliber bullpups ?

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DeepSouth

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I got to thinking (always dangerous) and I couldn't think of 1 pistol caliber bullpup. So I broke out Google and he found a few that never came to pass but really not much of anything. I didn't even find a bullpup kit for a pistol caliber bullpup, which didn't supirse me much as you'd need to start with a pistol caliber rifle, and they're already limited.

I'm not personally a big bullpup fan, but I am a big 45acp fan and honestly if someone made a bullpup in 45acp I'd likely buy it assuming the price wasn't insane. I may be wrong but I bet it's enough market out their to support at least one, I guess I could be wrong.:uhoh:

I can't think of anything in design that would make it difficult to manufacture, honestly I'd think they'd be easier to make than rifle caliber bullpups.

So what gives, why no pistol caliber bullpups?
What am I missing?
 
Because it is impractical, as you can put a pistol magazine through the grip, the compactness of the action means that 16" barrel + ~2" action length leaves 8" for buttstock to make minimum title I length, and because they don't gain much (if anything) going longer than 16" with the barrel.

The Kel-Tec sub-2000 is only 29.5" long, the Beretta CX4 just 29.7". Too many detractors of the bullpup design to justify <4" reduction in OAL.

For rifles, OTOH, it makes sense. You can still have a title I weapon with a 16" or 18" barrel that is as much as a foot shorter than it's conventional contemporaries, such as the Kel-Tec RFB @ 26" OAL with 18" tube vs. an 18" barreled .308 AR that will be over 3 feet, even with the stock collapsed.
 
P90 is a pistol caliber bullpup, its action is behind the trigger.. ive been considering building a mac-10 bullpup as well by extending the upper and lower receivers out forward to extend the trigger group to the front while concealing a suppressor under the new forearm (it would be both SBR and suppressed).. of course, magazine wont be in the pistol grip anymore but i was thinking i could shape a stock to act as a magazine well.. overall length should be under 20 inches with a full length MAC-10 barrel and 8" long 45acp suppressor, great home defense tool

pistol caliber carbines are easy to do, theyre largely direct blowbacks so with a small amount of math you could make your own if you have the tools for it
 
P90 is a pistol caliber bullpup, its action is behind the trigger.

ehhhhh.......ish. The P90 PDW was developed before the Five-seveN companion pistol, but the P90 itself doesn't exactly satisfy the practical criteria for a rifle, given not only the weapon's dimensions, but that the round is not really a rifle cartridge. But it ain't a pistol cartridge, either. Definitely in a (strange) class all it's own.

a mac-10 bullpup as well by extending the upper and lower receivers out forward to extend the trigger group to the front while concealing a suppressor under the new forearm (it would be both SBR and suppressed)

Now, where suppressors are concerned, a bullpup PCC starts to make sense. Now you're talking about a shoulder fired weapon that can be under 2' long with suppressor. No point whatsoever in having much barrel, since your velocity ceiling for truly effective suppression is roughly 1,150 FPS anyway.

Unfortunately, though, until we see supressors and SBRs given title I status, I just don't see much development happening in that area. Just too few of us playing the NFA game for manufacturers to cater a whole lot.
 
MachIVshooter, I do see that point and hadent thought of it.
The length gained over a simple carbine with the mag in the grip would be bery little. I do wish we had more PCC carbines to, maybe im to hard to please.
 
yeah, if it wasnt for adding an 8" long suppressor to the end of a mac-10 and wanting it to remain compact for close quarters such as a home defense weapon then i wouldnt even consider making it a bullpup.. theres actually very little gain in a pistol caliber going from a 5 inch barrel to even a 10 inch, doubling it, all the powder is used up in a pretty short length, add too much more barrel and the barrel will begin to slow the bullet down
 
The AGM-1 comes to mind. It came in .22LR, 9mm Luger, and .45 ACP. I don't know if it was made post 1980s though.

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Like already stated, the Tavor has a 9mm kit, and the 9mm kit for the AUG has been around a lot longer than the Tavor itself has.
 
Didn't somebody make a bullpup stock for the Marlin Camp carbine years ago? Senile minds want to know.

My ideal would be a pump action .357 bullpup if you could fit a moving forearm on a short rifle.
 
Back in the 1970s there was a sub-gun called a SIDEWINDER that was a Bullpup design. I cannot remember who made them. It was a simple design that was supposed to be good for 3rd world duties. I remember discussing it at a few meetings back when I was active duty.

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S&S SS-1 Sidewinder

Country of Origin: United States

Appears in: Literature of the 1980s.

Notes: The origins of this weapon are interesting. Delta was looking for weapons that would help them during Operation Eagle Claw, the abortive rescue of the hostages from the Iranian Embassy in 1980. One thing that Delta was looking for was a weapon that their operators could fire while roping down from helicopters (fast roping had not yet been developed). Two weapon designers, Sid McQueen and Donald Packingham, had been developing just such a weapon for some time, but the design proceeded slowly, primarily due lack of government interest – until the preparation for Eagle Claw began. Suddenly, Delta was very interested in the Sidewinder.

By 1980, S&S had four advanced Sidewinder prototypes (EX-002 in 9mm Parabellum, and EX-004 in 45 ACP). All were designed to be fired with one hand or two, were bullpup designs, and extremely well-balanced. The receiver and magazine could be rotated 180 degrees, without taking apart the weapon – one simply depressed a lever on the pistol grip while holding it vertically. (A later version, the EX-020 does not have this feature, for reasons which will become apparent in a moment.) This allowed it to be used by both right and left-handed shooters with equal ease, and could also allow shooters to shoot around left or right-hand corners quite easily. Construction was largely of a simple steel tube, with a steel barrel. The top of the receiver had a mount for a variety of collimator, laser aiming, or night vision sights. Fire selection was done by trigger depression – a short pull gave semiautomatic fire, while a full trigger pull gave automatic fire. The stock was simply a padded crescent-shaped steel piece – this was at the end of the main tube on EX-002 and EX-004, while on EX-003 and EX-020, a sliding stock and a shortened main tube were used. Caliber conversion was quite easy, consisting merely of changing the barrel, reversing the bolt, and changing the magazine. The magazine well had a projection which could be used as a speedloader for the magazines; the magazines used were Sten magazines for the 9mm Parabellum chambering, and M-3 Grease Gun magazines for the .45 ACP chambering. All but the EX-020 prototype were fed from the side of the receiver; EX-020 used traditional feed (from the underside of the receiver). The trigger guard swings downwards for use with heavy gloves. Fire controls are ambidextrous, as is the magazine release.

A peculiarity of all Sidewinders is the cocking knob. It is located at the center of the rear portion of the rear of the main tube, offset to one side. On all but the EX-020, the cocking knob reciprocates with the mechanism – which could lead to the knob hitting the shooter in the face if fired from the shoulder. As a result, S&S recommended that those versions should have the receiver rotated to the left if the shooter is right-handed and to the right if the shooter is left-handed. (The ejection port is far enough forward was to not present a problem in this regard. The EX-020 prototype has a non-reciprocating knob and therefore this is not a problem.

Though it is all very hush-hush, and to this day nothing official has come out, it is believed that Delta took two Sidewinders to Eagle Claw – the EX-003 prototype (an EX-002 with a caliber conversion capability, a Weaver sight base with backup iron sights, an extra fire selection setting (3-round burst), and a sliding stock); and the EX-005 prototype (an EX-004 with similar modifications except for the 3-round burst selector). Delta’s evaluations of the Sidewinder are still classified, but they apparently did not accept it for use after Eagle Claw. The EX-005 prototype in .45 ACP is identical to the EX-020 for game purposes; the EX-005 prototype in 9mm Parabellum is identical to the EX-020 prototype in 9mm except for the magazine it uses.

The final variation of the Sidewinder, the EX-020 prototype, did not appear until after Eagle Claw. Most of the differences are noted above, but it also had something the other prototypes did not have – a manual safety. The EX-020 also is much easier to field-strip and for armorers to work on, and in its 9mm iteration uses Uzi magazines instead of Sten magazines.

Unfortunately, no country’s military or police forces accepted the Sidewinder, and it became another footnote in history.
 

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I can remember a feature article in Soldier of Fortune magazine about the Sidewinder back in mid '80s. That was the first time, as well as the last time, that I read anything about it.
 
I don't agree on the PS90, all the way around. If the round fits in an autopistol magazine, I'm comfortable considering it a pistol cartridge. Even if it is unconventional. Looking at the distance between the breech on the P90 and the pistol grip, I'd say it's significantly shorter than a standard pistol cartridge carbine. The P90 is a lot shorter than any other SMG or carbine with the same length barrel. Especially one like a 9mm AR. I'd be all over a very well made, well designed pistol cartridge carbine. A bullpup like the PS90 would be a huge bonus. A 9mm would be fine but I'd prefer a .45ACP.

P90 with 10.4" barrel is 19.9" overall.
MP5 with 8.9" barrel is 27.0" extended.
MP7 with 7" is 25.1" extended.

That's a huge difference!

Yes, I know the difference between the P90 and the PS90 but it's easier to make the point about action length if comparing similar barrel lengths.
 
How about a rifle caliber bull pup pistol? The old Bushmaster pistol springs to mind. It used AR-15/M-16 magazines and the grip rotated for either left hand or right hand use and I believe even straight up and down. Their rifles based on the same action were .....well it is a wonder anyone would try to sell quality ARs using that name. The pistol was fun though and a full auto one I believed at the time would have been the perfect use for one of the old size of a carton(not pack, carton, kiddies. They were shall we say large-ish) of cigarettes lasers.

It was itself sort of based on a USAF armaments command the "Arm Gun" which used .221 fireball which technically is a pistol cartridge though I know of no rifle version of the Arm gun.

The side winder was later than either of those and I assure you the Bushmaster using the same ammo and magazines as the service rifle of the time could be effectively worked one handed.

I am curious as to how one would have a hand free in a traditional snap-link/carabiner free rappel. You need one hand for a break and the other for balance. With the Australian forward rappel which I never saw done as a free rappel (who would want to run face first into the ground below a helo?) one could fire a weapon with one hand and one of the wowszer shows was someone doing an Australian down a near vertical wall and onehand firing an M-60.

I believe Mendoza down in Mexico built a 9mm SMG that had the action behind the pistol grip and was fed by a maga zine that looks suspiciously like the HK and FN parralell to the barrel mags, but was much earlier than either.

I can not for the life of me remember the name of the outfit that produced rotary helix magazine .22 and 9x19mm rifles and pistols , but I used to wonder why they WEREN'T bull pupped instead of having the funky stock the rifles had.

Got to get back to my rat killing.

-kBob
 
Economics. Low demand, high price.

Rifle bullpups make more sense than pistol caliber bullpups, yet they struggle to survive in the market, and are about twice the cost of a rifle in the same caliber. MSAR makes an outstanding bullpup, but failed to succeed in the market and announced they are ending production and selling the tooling.

Pistols are about $600. How many people would honestly pay $1500 for a 27" pistol? I don't think too many would, certainly not enough for a viable production line to survive. Again, refer to the struggling rifle bullpup market. When ARs and AKs are $800, it's hard for most people to justify an extra $800-$1000 (Tavors and others are around $1800 today) to shave off a few inches in a bullpup platform. Unless you are in a niche market (MP/LEO riding in vehicles, or fighting in tight quarters) there is almost no demand at that price.

Further, I often scratch my head why folks want a pistol caliber in a rifle platform, given that pistol ammo costs the same as intermediate rifle ammo, yet is much less effective and has less range. The niche for a PCR is extremely small IMO. Put these together (demand and cost) and there is no viability.

I'd rather just have a widely available pistol and a widely available rifle (read inexpensive).

Edited to add: I have an overpriced Uzi carbine that is cool, but totally impractical and I've considered selling it and hold it only for the cool factor (and I got it for a really low price). I also have an MSAR rifle bullpup in 556. It's also really cool, but I realize that I had no need for the $1300 rifle when it doesn't do anything for me that my much less pricey rifles do... also hold it only for the cool factor. I would buy neither of them again today, sitting here and thinking clearly about it. The Uzi was really cheap, and the MSAR was an impulsive "gotta have it" purchase.
 
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Further, I often scratch my head why folks want a pistol caliber in a rifle platform,

For me personally, I just like the 45acp but the advanteges of less noise, almost no recoil, and keeping the same calibers come to mind.

Also I dont buy the price arguement, it seems to me like it would be revalatively easy to make a quality pistol caliber pup (or carbine) for under 1k, but I'm no engineer.
 
Further, I often scratch my head why folks want a pistol caliber in a rifle platform, given that pistol ammo costs the same as intermediate rifle ammo, yet is much less effective and has less range. The niche for a PCR is extremely small IMO. Put these together (demand and cost) and there is no viability.
Yeah, a lot of closed-minded people don't get it. They don't get the reduced noise. The reduced recoil. The reduced cost of ammo. Lighter ammo with commonality.

Right now Natchez has 1000rds of 9mm for $219.
Best I can find for decent quality .223 is Independence at Midway for $340.

The .223 might be slightly more effective but it's a lot of added noise, added blast and added expense for range that you might not need. :roll:
 
Yeah, a lot of closed-minded people don't get it. They don't get the reduced noise. The reduced recoil. The reduced cost of ammo. Lighter ammo with commonality.

Right now Natchez has 1000rds of 9mm for $219.
Best I can find for decent quality .223 is Independence at Midway for $340.

The .223 might be slightly more effective but it's a lot of added noise, added blast and added expense for range that you might not need. :roll:
If bullpups COULD be produced competitively in price, they would be. Again, the market is efficient. Supply, demand, economies of scale, R&D, etc are all at play. The cheapest you can get a new bullpup is around twice that of a carbine in the same caliber. So let's say that's a difference of around $500.

Ammo prices fluctuate, but lets assume that you save $130 per 1000 rounds. You BREAK EVEN on ammo prices after a few thousand rounds versus the added expense of the rifle. For most people, that's not worth the added cost for a LESS effective round. And that's assuming prices stay as they are. Prices could in theory flip flop or change up or down for either caliber.

The arguments seem to work against each other. If you want/demand ammo commonality presumably this is a duty/self defense situation. Presumably you'd also want the most effective weapon, not the tradeoff of a pistol caliber in a rifle platform. If it's a plinker then who cares about commonality?

The ammo commonality is a silly argument. Assuming you want ammo commonality, simply carry a secondary sidearm that uses the same mags - they are lighter, easier to carry, and less expensive. Want more range than a pistol offers you say?? Well then, USE A RIFLE with a RIFLE caliber. A PCR pays the penalty of a rifle (size/weight) without the benefits of the platform.

I've fired my Uzi rifle 9x19 under lights at night. You can literally watch the slower moving pistol bullet arc trajectory over the 200 meter range and the holdover is significant to hit the gong at that distance. Conversely, the 556 and 7.62 is flatter and you cannot see it, and it's much more accurate at that range.

556 only 'slightly' more effective? Get real. The 556 is much more effective than any 9x19. No debate. More energy, speed, distance, penetration, etc. In rough numbers, under 100 yards a 556 offers about 1400 ft/lbs kinetic energy, whereas the 9x19 offers much less at around 300-400 ft/lbs at the muzzle. It's a no-brainer that the 556 is much harder hitting. Real world? Military/LEO entry teams dumped the 9x19 SMGs in favor of the SBR AR15s in 556 for this reason - they are harder hitting.

Noise? That's what earpro is for. No time for earpro? That speaks to me as self defense, in which case again I'll refer to wanting the MOST effective practical rounds not a less effective round from a PCR.

Recoil? I'm unaware of a single adult that complains of the recoil of an AR15, SKS, or AK47. I've taught dozens and dozens of people on these platforms, and not a single person even hinted or had problems with the recoil. The AR recoil is comparable to that of a 9x19 or .40 from a rifle, in my experience.

I simply see (as reflected by the very low sales in PCR) very low demand for PCRs and making them expensive bullpups would be an exercise is failure.

Proof - there are several companies that make aftermarket bullpup stocks for various guns including the Ruger 10/22... not really flying off the shelves and I've never seen on in person at any range. Never seen many bullpups for that matter. Costly and unnecessary for 99.9% of gun owners. PCR bullpups even less so.

Rifle PCRs, and particularly bullpups, have too much working against them. No demand. High prices of the bullpup design, economies of scale. ECONOMICS and SCIENCE working against them...
 
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The arguments seem to work against each other. If you want/demand ammo commonality presumably this is a duty/self defense situation. Presumably you'd also want the most effective weapon, not the tradeoff of a pistol caliber in a rifle platform. If it's a plinker then who cares about commonality?
Give me a break, we all make compromises. Very few of us are using the absolute most effective firearm for defense. You may choose to defend your home with a rifle cartridge and that's fine. However, you will not sit here and arbitrarily dismiss the advantages that I know exist in a pistol cartridge carbine. If I was going to defend the homestead with something that would the absolute most effective tool for the job, it would probably be a 7.62, not a varmint cartridge, if you want to get right down to it. However, in reality, I know that a properly loaded pistol cartridge carbine will do a fine job. Like I already said, it will do so with less noise, less blast, less recoil and less weight. Those things are undeniable. If they are unimportant to you, or if you would rather live with the disadvantages I described, good for you. I don't have to blow an intruder into pieces to stop an attack.

With all that said, I defend the home with an 8-shot 870 12ga and a S&W M&P 15. Why? Because no one makes a good .45ACP carbine that will do what I want it to do. And because a 7.62 is just too much unnecessary.....everything. I don't need a friggin' rifle that will deafen everyone in the house to stop a perpetrator across the hall.


A PCR pays the penalty of a rifle (size/weight) without the benefits of the platform.
Brush up on your math skills buddy. Pistol cartridge carbines are always lighter and shorter than rifles. They have many of the benefits of a long gun, unless you think that rifle power and rifle range are the only benefits. You just choose to ignore them, for whatever reason.


Real world? Military/LEO entry teams dumped the 9x19 SMGs in favor of the SBR AR15s in 556 for this reason - they are harder hitting.
Completely irrelevant when WE are not hampered with FMJ's.


The 556 is much more effective than any 9x19. No debate. More energy, speed, distance, penetration, etc. In rough numbers, under 100 yards a 556 offers about 1400 ft/lbs kinetic energy, whereas the 9x19 offers much less at around 300-400 ft/lbs at the muzzle. It's a no-brainer that the 556 is much harder hitting.
Blah, blah, blah, meaningless energy. Come back when you've actually seen what they do to flesh.


Recoil? I'm unaware of a single adult that complains of the recoil of an AR15, SKS, or AK47. I've taught dozens and dozens of people on these platforms, and not a single person even hinted or had problems with the recoil. The AR recoil is comparable to that of a 9x19 or .40 from a rifle, in my experience.
Yes, recoil. I didn't say it had tremendous recoil, I said a 9mm will have less. Significantly less. Which might be an issue for some.


Noise? That's what earpro is for. No time for earpro? That speaks to me as self defense, in which case again I'll refer to wanting the MOST effective practical rounds not a less effective round from a PCR.
You reach for your muffs when you hear glass breaking at 2am? I'll take the weapon that will get the job done without making my ears bleed.


No demand.
Perception is everything. Due more to the kind of silly rhetoric in your posts than reality.
 
I see more and more 9mm AUG’s being used by police forces around here (usually replacing UZI’s).
 
Clearly the absence of bullpups in significant pistol designs supports my view
Yes, their absence is proof. :rolleyes:

There are lots of great ideas, great cartridges and great firearms that have not succeeded because of fickle shooters. Sales don't tell us everything.

For home defense, I'd take a .45ACP PS90, SBR with 10" barrel with 20-30rd magazines over ANY AR on any day.
 
Yes, their absence is proof. :rolleyes:

There are lots of great ideas, great cartridges and great firearms that have not succeeded because of fickle shooters. Sales don't tell us everything.

For home defense, I'd take a .45ACP PS90, SBR with 10" barrel with 20-30rd magazines over ANY AR on any day.
The market is pretty efficient - you can argue opinion but ignore fact all day... but facts dictate reality.

If you think a .45 ACP bullpup is so terrific, then make a fortune designing and building and selling them. But first, ask yourself what possible role does it serve? What does a semi-auto .45 ACP bullpup do that a Glock .45 fails to do (and a 2-3 times the cost, size and weight I will add)? You can get a Glock .45 and 27 round magazines, which will be just as practically effective at your "home defense" distances as a rifle. So, 99.999% of gun owners have zero need or demand, especially given the cost/size penalties. The pistol (with smaller mag) fits in a holster, glovebox, nightstand, etc. If you really want a rifle in .45, get a $200 Hipoint.

I see your point about fickle shooters, and sometimes agree with the general idea, however when it again comes to the price/size penalties, a pistol cartridge simple cannot perform to the level of a rifle cartridge. The market has and continues to speak on this point.

Look at all the pistol caliber rifles that have very soft sales. People would gravitate to these if they did perform... they don't.
 
If you think a .45 ACP bullpup is so terrific, then make a fortune designing and building and selling them.
That's a juvenile response and do not preach to me as if I just fell off the turnip truck. :rolleyes:


What does a semi-auto .45 ACP bullpup do that a Glock .45 fails to do (and a 2-3 times the cost, size and weight I will add)?
What does an AR rifle do that an AR pistol does not? By your logic, why not dispose of the AR rifle in favor of an AR pistol??? The answer is that there is more advantage to a shoulder fired longarm than more powerful cartridges.


If you really want a rifle in .45, get a $200 Hipoint.
No thanks.


People would gravitate to these if they did perform... they don't.
Really? It seems to me that there a plenty of folks buying pistol cartridge leverguns, which are also a very good option. I guess there ARE people who think a rifle chambered in a pistol cartridge has something to offer. Why? All the same reasons I listed above and you can NOT discredit them. Less recoil, less blast, smaller ammo, higher capacity and ENOUGH range to be effective. Do you think the pistol cartridge carbine kills anything any less dead than a .223 AR or .30-06 rifle? No. The latter simply have more range. If you don't need the range, you don't need a rifle cartridge with its associated muzzle blast, recoil, size, weight, etc..


The market is pretty efficient - you can argue opinion but ignore fact all day... but facts dictate reality.
Like I said, sales do not tell all. All that amounts to is a popularity test. We all know that what's popular is rarely the best of anything. There has been A LOT of good stuff produced by the shooting industry that has not sold well, for whatever reason. Besides, I'm not arguing that. I know they probably wouldn't sell. That doesn't mean it is a poor idea or that it would not perfectly serve its purpose. I could give a rat's posterior orifice what's popular.
 
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