Originally Posted By CODen:
Pardon my ignorance, but will a Colt/Olympic/other pistol caliber upper function on a BM XM15 lower without modification? What about magazines? Thanks.
Yes, your Bushy lower will work fine with the Olympic pistol caliber upper.
I have a 10mm that has been on Colt, Bushy and PWA. Works great.
Barrel is SS. You can get a muzzle break also, pre ban and/or A3.
In regards to magazines, you have 2 choices. You can get the modified Sten/Uzi mags that have a welded collar that allows the magazines to fit into the lower well, just like any AR15 magazines.
They also have a technique that allows you to use your various handgun magazines in BOTH your AR and your pistol! This would require modification of the lower to put a couple cuts into the area above the magazine well, to hold the adapter block in place. It can be taken out, if you release your rear take down pin. Works for Beretta 92/96, Glock 22/17 or Sig 9mm/.40S&W.
You supply magazines and for $5.00 per magazine they factory modify them to work in both your pistol and your upper, so says their catalog.
If you have any other questions, drop me a line and I will answer what I can, based upon what I own and/or have touched.