by SoulHunter » Sun Mar 28, 2010 4:21 pm
Okay, so I guess this would be the antithesis of a big bore post, but I am curious: as popular as the .17 Mach II cartridge has become, why are there so few of them available as uppers for the AR platform? .22 Long Rifle uppers abound, but the only two that I can find in a .17 Mach II are made by Ballistic Advantage and Olympic Arms. Any thoughts?