Sharps Bros.

The Jack - Gen2 features now include a threaded bolt catch pin, reduced weight and improved styling - and lower costs to you. Features : - Machined top to bottom from 7075-T6 aluminum, a peak-strength corrosion-resistant aluminum alloy - A hard coat anodize finish per MIL-A-8625, the anodizing model for model for most military and aerospace products - Full compatibility with all mil-spec internal parts - Full compatibility with all other aftermarket mil-spec upper receivers - Full compatibility with PMags, Hex mags and other standard capacity magazines - Multi caliber mark - Weight: 10.7 oz