Sharps Bros Jack9 Black AR Platform Stripped Lower Pistol Receiver – This is Sharps Bros pistol caliber version of The Jack, now updated to the Gen2 styling. Glock magazine fed. Available as the AR-15 lower that is compatible with most AR15 pistol caliber uppers chambered in 9mm, .40 S&W or .357 SIG. With the Gen2 Jack9 they also 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.

• Glock magazine fed
• Compatible with most AR15 pistol caliber uppers chambered in 9mm, .40 S&W or .357 SIG
• Black hardcoat anodized aluminum
• Not compatible with DI gas system uppers or rifle-caliber bolts