Built this upper but never used it. Prefer cash and will only consider trades for a VP9 or Glock 19X.
Build Breakdown
Barrel: 10.3"
Ballistic Advantage .300 BLACKOUT BA HANSON
PISTOL LENGTH AR 15 BARREL WI LO PRO, PERFORMANCE SERIES - $220
Upper: Aero Precision - $124
Rail: GEISSELE SUPER MODULAR RAIL MK4 9.3" M-LOK - $275
Gas Tube: $15