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. NOTE: Requires a lower parts kit, buffer & stock of your choosing to complete.
Specifications:
| Type | Lower Receiver |
| Gun Model | AR-15 |
| Gun Type | AR Platform |
| Caliber | Multi-Caliber |
| Material | 7075 T6 Aluminum |
| Finish | Black Hardcoat Anodized |
| Trigger | |