18 inch AR-15 Non Reciprocating Side Charging 12.7x42 (50 Beowulf) Upper

All our uppers are carefully assembled and tested and ready to go out of the box. Every component is chosen to ensure a high quality upper is produced. Every upper is custom built to order and we go the extra mile to ensure the finished product is to your specifications.This 12.7x42 upper starts with a Gibbz Arms G4 Non Reciprocating Side Charging Aluminum receiver, mated to a BCA 18 inch 12.7x42 (50 Beowulf), Mid Length Gas System, 1:20 Twist, Heavy Profile, Parkerized Barrel. The Gibbz Arms receiver is a proprietary patented receiver that has a non reciprocating side charging handle - handle stays forward during cycling. Side handle is on the opposite side of ejection port allowing the shooter to quickly charge or recharge the weapon without taking finger off the trigger and eye off the scope. The Axis Rail is a free floated system, M-LOK slots on all three sides, full length picatinny rail at the top, lightweight handguard. Barrel Nut is made out of solid steel to ensure a solid mounting system.Bolt Carrier Group is OPTIONAL. We offer a 12.7x42 caliber, M16 Profile, Properly Staked Gas Key, MP Tested, 8620 Carrier, 9310 Bolt, Nitride Treated. SPECIFICATIONSUPPER RECEIVER: Gibbz Arms G4 Non Reciprocating Side Charging Billet Aluminum Receiver with Gen 2 Handle, M4 Feed Ramps, Type III Hardcoat Anodized Black (Gibbz Cam Pin Included)BARREL: 18 inch, 12.7x42 (50 Beowulf) Caliber, 4150 Chrome Moly Vanadium Steel, 1:20 Twist, Heavy Profile, Parkerized - made by BCAHANDGUARD: 15 inch M-LOK Free Floated, Machined out of 6061 T6 Aluminum - made by Axis MFGGAS SYSTEM: Mid Length, Direct Impingement, Stainless Steel TubeGAS BLOCK: Low Profile Gas Block, Machined out of 4140 SteelMUZZLE DEVICE: Competition Muzzle Brake Black 49/64-20 with Crush Washer100% MADE IN THE USAOPTIONAL: ADD a 12.7x42 M16 Profile Nitride BCG