In 2018 Angstadt Arms teamed up with Sharps Bros. to manufacture a 9mm version of the iconic “Jack” lower receiver. The result was the Jack 9. A stylized lower receiver built on the proven Angstadt Arms 0940 GLOCK® magazine fed lower receiver.

The Jack9 lower receiver was a limited release and is currently out of production and discontinued.


  • Last round bolt hold open on an empty magazine (LRBHO)
  • Accepts 9mm, .40 S&W and .357 SIG GLOCK® magazines
  • Integrated, oversized trigger guard
  • Machined from 7075-T6 billet aluminum with a matte black hard-coat anodized finish
  • Threaded bolt catch screw
  • For use with a 9mm bolt carrier assembly and a standard AR-15 hammer
  • Accepts aftermarket Glock® 9mm double stack magazines. We recommend using factory Glock® magazines