Bcm 14 5 pinned and welded upper 56 page 1 ar15 com custom 300 blk ar 15 rifle 5″ 16″ nrc lmt pinned/welded complete mr556 griffin flashcomp hkpro forums armslist for sale: price drop: fn chf chrome lined inch nato pin weld 5pk sale/trade: to 16 with optic $225 w/o bcg specific flash hider discussions 6 8 spc dd rail aac bootleg / i want a pencil show me the way can radian weapons model 223 wylde black msf 56/223 receiver assembly $349