The Jack 9 Gen-2 is Sharps Bros pistol caliber, glock magazine fed, version of The Jack. Available as the AR-15 lower that is compatible with most AR15 pistol caliber uppers chambered in 9mm, .40 S&W or .357 SIG the Jack 9 is as versatile as it is unique. With the Gen2 Jack9 Sharps Bros improved the mag well, beefed up the ejector/magazine stop (and made it adjustable via set screws, to accommodate slight geometry differences across different types of 'Glock' mags) and switched to a threaded screw instead of a pin for the mag lever. The Gen2 Jack9 also has provisions for LRBHO (last round bolt hold open).
- Unique Skull Design
- Improved Magazine Well
- Last Round Bolt Hold Open feature