Cross Machine Tool UHP9 Pistol Caliber Stripped Lower Receiver (Non California Compliant)

Manufactured by Cross Machine Tool
Manufactured by Cross Machine Tool
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Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal Firearm License holder.
•Current processing time is approximately 14 to 16 days.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers. Due to Covid-19 many are no longer open
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to



Pistol caliber carbines are rising in popularity, so naturally Cross Machine Tool had to build a product that meets consumer needs while still being affordable. The UHP9 pistol caliber lower receiver is designed to be budget friendly while still offering many features. This 9mm AR lower receiver has full compatibility with Glock style magazines as well as a flared magazine well for fast reloading. The stripped lower is CNC machined from 7075-T6 Billet aluminum which is some of the strongest and lightest weight frame material on the market. It features a Type III Class II hard coat black anodization to ensure corrosion and wear resistance over long periods of time. The integrally machined trigger guard is larger than standard trigger guards for use with gloved hands and provides a unique look. The buffer tube area has been reinforced to withstand heavy use, so you can build a durable pistol caliber carbine. This AR 9mm Lower is compatible with standard pistol caliber upper receivers with AR-15 style frames and includes a receiver tension screw to keep your receivers locked tight together. Start your dream AR-9 build with the UHP9 lower receiver today.

  • CNC machined from 7075-T6 billet
  • Type III class II anodized black
  • .154” Diameter trigger & hammer pin holes
  • Multi-cal marked
  • Integrally machined trigger guard
  • Reinforced buffer tube area
  • Flared magwell, compatible with Glock style small frame magazines
  • No roll pins needed for assembly
  • Upper tensioning screw
  • Bolt catch assembly screw supplied
  • Magazine catch arm included
  • Weight: 8.5 oz.
  • Lifetime warranty against manufacture defects

Compatible with standard pistol caliber uppers designed for the AR-15 frame
9mm AR-15 rifles are extremely fun guns to use but they are also quite practical. You can build an SBR for home defense, a pistol for fun at the range, or a 16-inch carbine for hunting small predators. The 9mm round performs well in short to long barrels and the simply blowback system is quite reliable. Just like AR-15 rifles, there is a large amount of aftermarket parts and you can even use AR trigger groups with Mil-Spec .154” pin holes.

Cross Machine Tool Co., utilizing the latest machining technologies, offers high quality products that you’ll be excited to own. Cross Machine Tool is a veteran owned business that takes pride in manufacturing products you will own. CMT products exceed military standards, so you can build the best AR style rifle possible.
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BrandCross Machine Tool
Caliber Marking9mm Luger
FinishHardcoat Anodized
Receiver Material7075-T6 Aluminum
Trigger Pin DiameterMIL-SPEC .154
Weight8.5 oz.

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

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