If you want a quality AR carbine at a great price, Grant’s end of the year LMT sale is hard to beat…
https://www.m4carbine.net/showthread.php?t=9940
Buck
But some Storms take the M9/92FS mag and some take the mags of other Beretta pistols- the Cougar or something like that. I’m not up on those newer pistols.
They take their respective Beretta magazines the same as the pistols…
The 9mm take 92 magazines, the 40 cal takes 96 magazines, and the 45 takes cougar magazines
Not quite from what I heard.
To be safe, I looked it up. Different calibers and different models depending on mags used:
Cx4 Carbine, 40 S&W JX49610M 40 S & W
Cx4 Carbine, 8000 Carbine JX48010M 9 mm
Cx4 Carbine, 8040 Carbine JX48410M 40 S & W
Cx4 Carbine, 8045 Carbine JX48510 45 Auto
Cx4 Carbine, 92 Carbine JX49210M 9 mm
Cx4 Px4 Carbine JX4P415 40 S & W
Cx4 Px4 Carbine JX4P915 9 mm
Cx4 Storm Jx49610 40 S & W
Cx4 Storm JX48520 45 Auto
Cx4 Storm JX49T90 9 mm
Well you learn something new every day… The 9mms and 40 cals will all take 92 or 96 magazines, but you may have to change the magazine insert and magazine release if you have one designed for the cougar or PX4 mag…
Converting magazine type in the CX4 Storm
Question
Can the CX4 Storm be converted to accept different model pistol magazines?
Answer
Yes. The CX4 Storm carbine has been available in 3 configurations per caliber, based on the magazine type used. In 9mm or .40 caliber, the carbine is available to accept 92/96 series magazines, 8000 Cougar series magazines or PX4 Storm magazines . In the 45 Auto version, we only offer 1 magazine type so a conversion is not needed.
The magazine type that a CX4 Carbine accepts can be changed by replacing the magazine insert and magazine release button. We recommend that a gunsmith perform the conversion. The following part numbers are needed in order to use the magazine from another model:
92/96 magazines require the C5A511 insert and C89109 release button.
8000/8040 magazines require the C5A670 insert and C89110 release button.
8045 Cougar version uses the C5A671 insert and C89110 release button.
PX4 9mm and .40 caliber magazines require the C5C620 insert and C89210 release button.
The correct magazines for each conversion will also need to be purchased.
Once this change has been made the carbine will not accept the original magazines without re-installing the original parts. Please note that early CX4 Carbines may require minor fitting inside the magazine well when being adapted to use the PX4 magazines…
Just FYI, Colt 6520s (A2 upper, .625" dia barrel) are available for a shade over $1k. Here is just one example. If you shop around they are available for even less on the used market.
Get her going on the A2, and when you’re ready pick up a Colt M4 stripped upper (if you can find the “blemished” that show up from time to time so much the better). Transfer the parts from the A2 to the M4, sell the A2 to recoup most of what you spent on the M4, and you’re good to go. You can take that same opportunity to install some type of railed free-float if that’s the route you wind up taking. A Daniel Defense 7.0 weighs less than the parts it replaces.
But either way you start out with a Colt that is equal in quality to a 6920 for $200-$300 less.
My first Colts were a pair of 6520s that I picked up for $1k/ea. If Colt would make a 6520 with a flattop and an “F” FSB I think it would be the best model they offer.
I began looking into 9mm carbines a coupla months ago, actually, and I asked Santa to bring me the Cx4 Storm.
:mad:
Gotta get me a bigger stocking…
Yeah, that’s the one… a 6520 (Colt AR15 A2)
They wanted just shy of $1400 for a NIB… :eek:
But it will be a cold day in hell before I buy from a “hunter” shop over a committed AR dealer like Grant, GotM4 and others… Even if I have to eat the FFL fee…
Rmpl
I would if I had the $$$ by 12/31… I won’t be ready to buy until 1/4/08… 
Day late, dollar short… :rolleyes:
Rmpl
Glad you and your wife have found what fits her best. Given that you are buying this for your wife’s use as a defensive carbine in the event this becomes necessary, a tier-1 manufacturer is your only option - go with the Colt.
So you can convert them too? Wow. Sure makes shopping for one hard.
For weight savings, have you considered a pencil barrel upper of your choice (probably Colt) on a Cav Arms lower?
Yes on the lightweight barrel… The desire to have a LW mid-gas upper for her has kept me from selling something to get a LMT from Grant before 12/31 sale end…
Not that familiar with Cav Arms lowers… I think they are the polymer ones, right?
Do you have any weights on these compared to a standard aluminum one?
Rmpl
If I recall correctly, the weight savings is something like 1 pound.
I used to have one that I was going to do a build on, and sold it to do something with a telestock. I really regret getting rid of it. It was very light, the pistol grip had ergonomics like the Magpul MIAD grip with the thicker backstrap, and the buttstock was A1 length with a nice grippy rubber buttplate.
My 20" A2 upper felt OK on it, and shooting it like that felt different but definitely better.
Edited to add - saw somewhere else here that someone says the weight savings is half a pound.
Even the A1 buttstock is too long for her, so the CA is out… She can do it but she looks extended out like those viet-cong kids with M16’s you see in pictures… 
I’m now in a search for a nice Colt 6520…
Rmpl
Give DeGoff’s a call, they should have some in stock and they do layaway.
Let your fingers do the clicking…
That’s an old thread… He does not have one listed on his web site… I checked.
Rmpl
OOPS… This is a heavy barrel carbine… Sorry…
Well here is a deal on a Colt 6721…
http://www.sturmgewehr.com/webBBS/semi4sale.cgi?read=186066
I think it has everything you want and comes with a ARMS rear sight too…
Here are the specs:
http://www.colt.com/law/ar15a3.asp
Hope this helps…
Buck
I am negotiating on a NIB 6520 now for $1100… Thanks though…
Rmpl