I've come to the realization that my SBR build will never happen. Looking to trade my Model 1 sales 10.5" upper. I got the upper from a friend who put less than 100 rds through it. The upper includes BCG, Quad Rail, A2 Flash Hider, & original grips. The barrel is stamped 5.56 NATO 1:9. Looking to trade for a .357 Snubby or??? May consider a trade for non SBR upper.