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11/25/2007 2:32:48 PM EDT
It's a Doublestar lower if that matters.
11/25/2007 2:35:32 PM EDT
[#1]
from the FAQ


Q: How many calibers can I get uppers for? What are they?
A: While the list is nearly endless with all the wildcats possible. Here are the some of the more common and more interesting uppers that are (or have been) produced:

   223/5.56 and based upon that case
   6 x 45
   7 x 40
   357 Mag Rimless
   300 Whisper / .300Fireball (also other calibers)
   6.5 x 40
   30 Coyote (30 x 45)
   17 Remington
   17 Mach IV
   20 Tactical
   19 Calhoun

   5.7 FN (developed by Rhinland Arms - no word yet on who is going to mfg it)

   204 Ruger

   6.8 SPC
   30 HRT
   338 Spectre
   10 mm Mag
   35/40
   219 WASP-C

   7.62 x 39
   338 x 39
   6 PPC
   6.5 Grendel
   22 PPC
   7 sCAR ....

   30 Carbine
   5.45x39 / .21 Ghengis

   7 BR
   6.5 BR
   300 Sabre

   8mm (belt fed upper)
   .308 (again a belt fed upper - no longer available)

   458 SOCOM
   44 Mag
   440 CorBon
   44 AMP
   .475 Tremor
   50AE
   499LW
   50 Beowulf

   .50 BMG (single shot)
   .50 Blackpowder (1 made)

   9mm
   45ACP
   32ACP
   22 LR
   17 HV
   10mm
   7.62x25
   224 BoZ
   7.62x24
   9x23
   357 Sig
   40S&W

   223 WSSM
   243 WSSM
11/25/2007 2:43:06 PM EDT
[#2]
The .450 Bushmaster is a relatively new one.
11/25/2007 2:53:41 PM EDT
[#3]
I saw that on the FAQ but I heard that to use certain caliber uppers* you had to have a special lower. Guess I heard wrong.


*Ones above .30 caliber.
11/25/2007 2:55:18 PM EDT
[#4]
A mag fed .308 takes a different lower.
11/25/2007 3:19:50 PM EDT
[#5]
So if I get any 9mm upper, it will work on a 5.56 lower as long as I get 9mm mags?

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