CX4 Storm 9mm or 40 S&W

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zerobarrier

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Ok so I know this is a stupid question and it boils down to personal preference but I am looking for some opinions. I can't decide which caliber to get in a pistol carbine. I have narrowed it down to the storm because I can't stand the look or feel of the hi-point, don't want to spend $1200+ on a colt AR or Rock River AR, and I don't like the current situation on the mags for the taurus ct9 or ct40. I have a PX4 storm in 40 and I reload for both 9mm and 40, plus I have alot of ammo for both calibers. I like the large cap mags for the 9mm but I also like to idea of using the same mags as my px4 with the 40. Does it really matter which one, should I just wait to see which I can find the best deal on? My local gun store has a used 9mm version that come with 4 mags, rails, hard case, and everything from factory for $675, could get him down to $625(he usually works with me on used guns). So what does everyone think?
 
I would probably buy the 9 and then get the Pistol to match. I haven't seen the carbines go for less than $800 in a while, but you could find someone to go even-up swap for your .40. My $.02.
 
Well, Buds has the CX4 in stock for $669 shipped, and it includes a pair of 15 round mags. That might help you negotiate a little after you decide what you think the extra rails and the extra pair of mags are worth to you. Also, does this used CX4 have the PX4 magazine adapter insert? (It's a $20 part new.)

Overall, that's a tough one. I guess it boils down to how important mag compatibility with your pistol is to you vs. being able to use the Beretta 92 factory 30 round magazines. If both are of high importance are you willing to buy a 92 or trade your PX4 for a 92? If you can live without the 30 round Mod. 92 mags, then the PX4 20 round 9mm mag vs. 17 round 40 S&W mag is too close to worry over.
 
Whether it's in a pistol or a pistol caliber carbine.. I much prefer the heaviest round I can launch down range in any kind of defensive situation. So my advice would send you towards the 40 cal if money isn't your prime consideration.
 
S&W MP-15 Sport is in the same $600-699 price range and is a great AR value.
 
On a rifle platform, the recoil should not be an issue and I agree that the greater weight on the perp would have greater effect than a lighter projectile. So I would go for the .40.
 
Since I absolutely despise the .40 S&W cartridge for too many reasons to get into here, my choice would be the 9mm Storm if I was really hankering for a pistol caliber carbine, which at the moment I am not.
The CX Storm would be my pick of a pistol caliber carbine if I was, for reasons too numerous to get into here.
 
From a defensive standpoint, there is no measurable difference between the two calibers in terms of real-world terminal effectiveness. Because of that, I tend to choose 9mm due to faster follow-up shots and cheaper ammo (the higher capacity is just a bonus for me).

However, in a CX4 the recoil difference between 9mm and .40 will be negligible, so I wouldn't use that as a deciding factor. Also, you reload and you already have lots of ammo in both calibers, so the cost of ammo difference will be negligible as well. And you already have a PX4 handgun in .40, so if you got a .40 CX4 you'd be able to swap ammo and mags between your handgun and your carbine, which is a big upside in my opinion. For those reasons, I think a CX4 in .40 will be a better choice for you.
 
Some of the advantages 9 mm offers in a handgun may be negated to some degree in carbine form. The main advantages of a 9mm are reduced recoil and higher capacity. However, because a carbine is much heavier and gripped differently, the recoil difference between a 9mm and .40 in a carbine is likely negligible. Therefor, faster follow up shots are not likely to be significantly faster with 9mm over .40 in carbine form. Such also may negate the importance of higher capacity. The advantage of .40 is greater wound potential. The other advantage of 9mm though, and this can be a huge one, is cost.
 
Thanks for the input everyone. But now I believe I am leaning towards an AR 9mm, colt, RRA, or CCMG. This is mainly due to that I have found out that you can't thread the barrel of a CX4. I eventually wanted to put a can on it. This is because the rifle is imported and is a sporter rifle. So if you thread it it is a violation of 922r since you can then put a flash hider on it making it a non-sporter. I know there are places that will thread it and few people even know about this law including gov agents, but I don't want to risk having an illegal firearm in my house. Especially since I have other NFA items. Oh well I like the AR's even though they are a little more money. Probably get a colt and put some OD green magpul MOE furniture on it, I don't have a green one, so I guess I will have one in each or the colors now, OD, FDE, and black - YAY.
 
What about getting the CX4 bbl threaded and having a 3 lug adapter pinned & welded on at the same time. With the 3 lug adapter permanently attached would that not maintain the rifle in sporter status? I don't know myself, but it's an idea.
 
The cmmg 9mm is a very nice piece. I have it and the cx4 .40 the cx4 is cool looking and very comfortable/ well built, take down Is very fast. The cmmg has an awesome trigger and is very well built. I like the .40
 
Those mechtech are a cool idea but they just don't look right. What mags does the cmmg take and are they easy to get?
 
I've been considering a pcc as well, and I gotta say that the manufacturers aren't making it easy for me to part with my money. Hi-point doesn't offer high capacity mags, the beretta has a 12 lb trigger and can't be threaded, and the AR versions are 4-5" longer and a pound heavier than a true pcc like the cx storm. The mechtech system is interesting, but I don't own a Glock.

Maybe the oft-rumored never-seen Glock carbine will come to fruition some day and address all these issues.
 
I guess I could just go with a kriss vector and be done with it. SBR is small, light, barely no muzzle flip, threaded, shoots 45acp, and pretty cool looking. Just wish it wasn't $1800 + $200 tax stamp and a year wait.
 
Either caliber is good to go. I prefer 9mm.

Swapping the trigger to a US made one will keep you in compliance with 922r.
 
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