JARD Bolt Action Knob Tactical Outer Diameter 0.850in Length 1.4in 5/16x26 Aluminum Black

Type: Non Reciprocating Side Charging Billet Upper ReceiverCaliber: Multi (Designed for pistol caliber AR rounds)Magazine: Accepts all Glock pistol caliber magazinesWeight: 13.6 oz Other Specifications and Features of the Side Charging AR-9 Stripped Billet Upper with LRBHO: Machined from 6061 billet aluminum Matte black hard-coat anodized per Mil 8625 Type 3 Class 2 Compatible with all Glock Mag AR-9 components and most aftermarket parts Adjustable tension slide lock on charging handle Rear dust cover trap door that seals shut when mated with lower Manufactured to MILSPEC on state of the art CNC equipment for consistent quality parts and exacting tolerances Save money by building your own AR pistol caliber rifle from the ground up exactly the way you want it configured Designed to match lines with New Frontier Armory C-9 and C-45 Billet Lower and most forged lowers**NOTE: Some rail systems that use anti-rotation tabs may need slight modification to fit this upper. It is designed for flush mounting rails and standard hand guards.**NOTE: When building Colt 9mm Carbines, please use our Standard C-4 Side Charging Upper**When using this upper for a 9mm or .40 build you must either use a carbine buffer with our buffer spacer, or a 9mm LONG buffer. Not following these instructions could cause damage to the rear door of the upper that will NOT be covered under warranty**The New Frontier Armory Side Charging AR-9 Stripped Billet Upper with LRBHO is proudly MADE IN THE USA by hard working American men and women.