bohica arms single shot 50bmg.30" barrel, 4 rail free floated handguard. this 50 upper pins on a standard ar-15 lower.this is an ready to fire package. the scope is an 30mm tube 8-32x56 leapers swat with burris extrerme rings. the lower is an areo with standard a2 stock and limbsaver slip on recoil pad. has about 125 rounds fired.likes the 750 a-max the best.shoots 4"-6" 5 shot groups at 600 yards $2000 complete or $1375 for upper only no optics please no trades at this time looking to buy a sako trg42.