see the pix of a cheap dark bore RPK with original receiver stubs bridged with a weld-in of a section from a bent flat. .035 flux core with US HTS, follower/floorplate and rebuilt receiver. about $210 in total. about 6 hours, most of which was getting the cosmo off the kit. since the pic the repair section of recvr and welds were buffed and cold blued to match. looks good from arms length.