MK12 Mod 0 upper Gen 2

Mk12 mod 0 Gen 2 upper receiver, comes complete, ready to shoot, with complete bcg, sights, top rail, gen 2 forearm and allen engineering brake / collar setup. barrel is Douglas 18" available in 1/7 or 1/8 twist, black or FDE finish. produced by PRI, allow 5-10 days for assembly and testing before shipment.