Are submachine guns obsolete to assault rifles for military use?

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APD issues 12ga. shotguns. If officers want anything else they have to buy it themselves and go through the qualification class.

Pistol caliber carbines are not as popular as .223 carbines.

Even though the local SWAT team has some select fire weapons they do most of their shooting on semi. They have a couple MP-5SD SMGs for when quiet is needed.

But this thread was asking about military use. Most soldiers need something that will reach out to 200-300 yards and still have some penetration.

Hard to do that with a pistol cartridge.
 
"A decently designed pistol caliber carbine with modern sighting and light systems would meet most of the demands the average LE officer encounters that are not met by their sidearm..."

What are these demands ?
Personally, I can't see anything that a pistol caliber carbine offers that is not already met by a handgun. Again, this is just my opinion. It doesn't really give you any more range than a handgun since the cartridge is the same. The limitation on effective handgun range is the skill of the operator, not the weapon. It doesn't give any increased ballistic performance when firing a 9mm or .45 ACP cartridge. It doesn't give the officer the ability to defeat body armor. It is longer and more cumbersome without giving any additional benefit. If it uses magazines that interchange with the duty handgun, it doesn't even give an increase in ammunition capacity.
 
Tony,

Ok that's one. But just one:)

NM Shooter

True, DMK was originally posting about military uses. The military and LE have different needs IMO. I don't think the same weapons aways serves the needs of each equally well.

444
"It doesn't really give you any more range than a handgun since the cartridge is the same."
Last time I checked longer barrels produce more velocity and that would tend to equal more range, NO? Most people shoot better with shoulder weapons than they do with handguns even if it's a carbine with not-so-great sights. I know personally much past 25 yards with a pistol and I'm out of the running (correction, I better start running). I may be wrong but it seems to me the number of times your average LE officer needs to be able to shoot his or her 223 200-300 yards is rare. Even small departs have a few peps with the skills and tools to do that once in a millenium when it does happen. What this concept is "aimed" at is the stand off situation where the PO would like to be far enough way from the BG to keep the BG from eating him alive with the Saturday Night Special he has while at the same time being close enough (50-100 yards) to do just that to the bad guy with a well designed service/LE carbine. Unless the data has changed recently, BGs still tend to show up armed with handguns (and not rifles) during the commision of their crimes or when "treed."

"The limitation on effective handgun range is the skill of the operator, not the weapon."
So?
That is also not the point of my post. I've seen and shot pistol caliber carbines at regulary hit things at a 100 yards I could not with my handgun shooting the same ammo in both.

"It doesn't give any increased ballistic performance when firing a 9mm or .45 ACP cartridge."
Longer barrel=higher velocity=better performance (assuming the round chosen is not a turkey). Any covers all the territory. Are you sure you what to go with no increase.
If you don't agree read up on the countless posts and not a small number of publications regarding the performance decreases being experienced in the ME with short barrelled ARs.

"It doesn't give the officer the ability to defeat body armor."
Are all BG's wearing it these days, even 1%. I think not. BTW, can we always count on 223 being able to defeat body armor? I wonder how some of the newer 233 rounds carrying bullets designed not to over penetrate in building can still defeat high level body armor.

"It is longer and more cumbersome without giving any additional benefit."
Reread my post.

"If it uses magazines that interchange with the duty handgun, it doesn't even give an increase in ammunition capacity."
So if capacity is THE consideration why not belt feds.
Being able to exchange hi-cap mags between sidearms and LE service carbines IS a main part of the whole point. Like I said, many LE pistol mags hold 17 rounds now and it's not a big deal to get slightly longer ones that hold 25. I don't think a 17 to 25 round mag gives up much over a 20 or 30 round AR mag.

I'm not saying this concept should remove the AR platform from the armories list of LE. I think there is a lot of merit of a weapon that falls between the standard LE sidearm and the AR. Some will say the idea of a LE carbine is a comprise to both the pistol and the AR and as such is compromised too much to be justified.

I'm in the camp that sees it as better than either is some ways and worth considering.

A no flame intended 444.
DMK a apologize for theft of this thread.

S-
 
The current trend in military is to replace all MP5SMG with M4 carbine. last time I saw a armory at San Diego, the MP5 are rarely check out for mission. mostly the log on MP5 is for trainning. the M4 CQB with 77gr MK262 round are doing the job the military needs.

As far as supression, what is the intended job?? for total silence, the 9mmsubsonic or the 45 are still the best choice, but most operators are moving toward suppressed pistols for close in work. a suppressed M4 is just to redirect the sound signature so the target can amke out where the shots are coming from.
 
Since the idiots running the military ordnance have once again decided that giving troops the option of full-auto is a waste of ammo, every full-auto the troops can get ahold of, gets grabbed! The skill involved in firing full-auto is gained very quickly, you just don't have to empty the mag every time! When learning on the old crew-served MGs, we used to think fire a BURST of six. The time you thought(or said) burst, would send about six down the pipe.
For a battle rifle does anyone actually prefer having safe, semi, three-burst to safe, semi, full? Remember, you don't have to keep the trigger back any longer than deemed necessary! And, you can be the judge of that!

taa, cs :D
 
Selfdfenz:
I have personally conducted my own tests using a couple different pistol caliber carbines including a couple chambered for the 9mm cartridge. I posted the results on this board but I no longer know how to find the thread: you used to be able to search for a word and a person at the same time and I don't see how to do that now. Anyway, my findings were that when using an autoloading pistol cartridge, the difference between a handgun and a carbine was very slight. Not enough to be meaningful. Depending on what load you are using, the difference may be as little as 50 fps. With revolver cartridges like the .357, the difference is dramatic, but the autoloaders are getting almost all the horsepower out of the cartridge in a pistol length barrel.

"Most people shoot better with shoulder weapons than they do with handguns even if it's a carbine with not-so-great sights."
I would give this a maybe. If you don't have the training and experience, having a carbine is not going to make any difference, well maybe a little difference which = maybe. If you are a poor shot, it isn't the equipment you are using, it is your skills. Which blends right into my statement about "The limitation on effective handgun range is the skill of the operator, not the weapon."
What I attempted to do in that post was to outline what advantages I think a RIFLE caliber carbine give you that a PISTOL caliber carbine don't. If you are going to carry a heavier, and harder to manage weapon, then why not have it provide significantly better performance than your handgun ?
#1: Range. The chances of a police officer ever needing to engage a target past spitting distance might be rare, but if he has the equipment, he at least has a chance to do it: the rest is up to him.
#2: With a carbine chambered for a rifle cartridge the officer has some ability to penetrate cover including body armor. Again, this may be a rare occurance, but if he encounters it, he has a tool to deal with it. Not so with a pistol caliber carbine.
#3: Magazine capacity. Again, it isn't often that an officer might need 30 rounds in a firefight, but if he does, he has it. Magazine capacity isn't THE point, but if you can get it, why not take it ?
#4: Rifle cartridges offer SIGNIFICANTLY greater leathality (is that a word). The do a whole hell of a lot more damage than a pistol cartridge.
 
444

All good points. I can't argue that if and when the bad times come having a rifle cartridge is most times a better choice than something less powerful ie. a pistol caliber cartridge.

We look at the issue from different perspectives which is aok.

The service weapons carried by LE have changed a lot in the years I have been observing the trends. The needs have changed too.
Depending on the department, LEOs have traditionally been issued handguns and/or shotguns. Of late many departments have seen fit to provide some type of rifle. All well and good.

The fact that different kinds of firearms are issued is a clear indictaion to me that those people tasked with defining the envelope see a need of diversity.
I think there is a niche for a tactical carbine. Not a few HP units issue the 357 SIG cartridge. A modern, well designed tactical carbine equipped with good optics in 357 Sig (or perhaps some other calibers) might be another useful tool. I think exploring the possibilities is much to be desired.

A few years back when many departments were trading in their 357 magnum revolvers for wonder nines, the 9 mm cartridge developed a spotty reputation. The ammo we have now is a lot better than some of the stuff issued and used in actual shootings back in the day. If you or I were a decision maker trying to decide on the 9mm today as opposed to back then we might use different facts to come up with different decisions. The fact that so many departmenst adopted the 40 S&W makes the point moot but I toss the concept out for thought.
Lord knows the AR platform has morphed over the years. I guessing no PD would decide to accept or reject the AR as a police rifle by looking at its 1969 configuration but I think that is what happens when the concept of a tactical carbine in pistol calibers comes up. People think greaseguns and such which IMO is unfair to that the platform might become in modern garb.

I guess all I'm saying is we have no real data on tactical carbines of modern design to make sound judgements as to how useful they may or may not be cause there aren't many to evaluate. (Beretta Storm not withstanding)

To say they are basically useless based on what is out there today is what we in science call "biasing the findings, based on limited or biased data". Which is never a good thing.

Take care,

S-
 
Doesn't 5.56 fragmentation become extremely unreliable when shot from 10" barrels (m4), thus just making .22 caliber holes? In that case i'd take the subgun (larger round) for close quaters.
 
One would think that this would not be true in a general sense due to the problem of overpenetration with a rifle round (or just missing and whacking someone 500+ yards away). I'd still prefer a pistol caliber carbine for purely close quarters combat.
This was brought up a couple times in this thread and no doubt is a very real concern, especially in Urban Counter Insurgency scenarios like in Iraq or the action we had in Somalia last decade.

I'm dubious about 9mm, .40S&W or 45ACP FMJ(we're talking military, no HPs here) not overpenetrating building materials, light cover/concealment or even bodies to hit innocent noncombatant's. Now, 7.62x39(and I assume 5.56x39) would be a bad choice for this type of mission. However, I don't think FMJ pistol rounds would perform any better than .223.
 
Doesn't 5.56 fragmentation become extremely unreliable when shot from 10" barrels (m4), thus just making .22 caliber holes?
Good question.

The chart on this page shows the 14.5" barrel having reliable fragmentation out to 65 yards for M855. Using Mk262 OTM(the likely choice for special ops, I'd assume) doubles the range to 145 yards out of the same barrel.
 
According to DocGKR from the terminal effects forum on Tacticalforums.com the 9 inch barreled weapons like the SIG 552 and G36C can still produce fragmentation at short ranges IF they use rounds like the 75gr TAP or 77gr Mk262.
 
sub-guns

guy's i am a class III lic. holder and just happen to have a mp-5 spec op's in my hands right now. yes they have there merits and detractions. my little mp is in 10 mm and will hit a man sized target at 100 meters with out really trying. it is great for the urban enviroment where ranges are not far and with the right ammo it's suppresor is quit effective, and with the right ammo i don't have to worry who is in the next room. and by the way it makes a bitch'n squirrel gun. and thats my two penny's on the subject.
 
Though I am veering off the thread again...

Pistol caliber carbines would be much more popular if NFA rules mandating minimum barrel lengths were eliminated.

Detachable shoulder stocks for pistols might be an option then, as well.
 
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