The jack - gen2 features includes a threaded bolt catch pin, reduced weight and improved styling.It is machined top to bottom from 7075-t6 aluminum with an oversized and integral trigger guard, beveled magazine flare, and a multi caliber mark.The jack is fully compatible with all mil-spec internal parts and other aftermarket mil-spec upper receivers, and gi standard issue magazines as well as pmags.

Type: Lower Receiver
Gun Model: AR-15
Gun Type: AR Platform
Caliber: Multi-Caliber
Material: 7075 Aluminum
Finish: Black Hardcoat Anodized