Hi guys! Can anyone point me towards a stripped good condition semi SP1 upper? Will need the original two piece pivot pin as well. Havnt had much luck online lately. They seem to be mostly FA M16 uppers. Thx...
GunBroker is one of the most reliable sites, & GenoFromReno is GTG. The parts you seek are expensive, unless you happen into them at a gun show & somebody doesn’t know current prices or just wants to get rid of them.
You COULD buy a Fulton Armory slickside upper & either drill the front to 0.319” (double check the spec) or just use the 0.250” pin: