Armalite AR-50A1, .50 BMG cal. single shot rifle. Serial #US372671.   Excellent condition. 30” heavy barrel has an excellent bore. Muzzle brake.  Matte black finish is 98% and nice. Aluminum chassis is excellent with adjustable check riser and butt plate. Smooth action. Bi-pod.  Integrated scope mount with a Sightron, SIIISS 6-24x50mm variable scope with ¼ MOA adjustments.  Muzzle brake. Also includes a tri-pod mount. A must have for engaging target in the next area code! Very powerful - NOT for the timid or beginning shooter.