The Jack 9mm Lower Receiver (9mm, .40 S&W)

Description

The Sharp’s Bros “The Jack”

The Jack 9mm Lower Receiver is a high-quality firearm component designed for use with 9mm and .40 S&W AR-15-style rifles. It is constructed from durable aircraft-grade aluminum, making it lightweight, resistant to wear and tear, and now updated to the Gen2 styling. Glock magazine fed. Available as the AR-15 lower, 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.

The lower receiver features a Mil-Spec type III hard coat anodized finish, ensuring a long-lasting and corrosion-resistant surface. It also includes a threaded bolt catch pin, eliminating the need for roll pins and providing added convenience during assembly.

The Jack9 Lower Receiver is compatible with standard AR-15 style upper receivers and is designed to accept Glock magazines. It also features an oversized trigger guard, allowing for easy access with gloves.

The lower receiver is marked “MULTI” in the caliber designation, allowing for use with 9mm and .40 S&W cartridges.

Overall, the Jack9 Lower Receiver is a reliable and high-quality component for anyone looking to build a 9mm or .40 S&W AR-15 rifle. Its durability, compatibility, and adjustable tensioning screw make it an excellent choice for recreational shooting and professional use.

 Jack 9mm Lower Frequently Asked Questions.

• Is the lower receiver compatible with standard AR-15-style upper receivers?
  • Yes, the lower receiver is compatible with standard AR-15-style upper receivers.
• Does the lower receiver include a tensioning screw?
  • Yes, the lower receiver includes a tensioning screw.  It can be adjusted to ensure a tight fit between the upper and lower receivers for improved accuracy and reliability.
• Is the lower receiver marked with a caliber designation?
  • Yes, the lower receiver is marked “MULTI” in the caliber designation, allowing for use with 9mm and .40 S&W cartridges.