Converted by LeMAG - uses regular m1 mags (think the 15 rounder holds 8). The work was done on a Univeral receiver with the remainder being GI parts. It looks like the ultimate home defense gun, with unreal stopping power as you could go as high as 300 grains. Would be poison on wild pigs or deer in the brush, too. I'd like some opinion, though...it looks sturdy enough...the barrel is not a reamed out GI...it's new, and the rifle is rock-solid - undoubtedly having been built to handle the pressure. There's one in a shop locally that I could probably walk out with for $500...anyone seen or heard of these??