Angstadt Arms UDP-9 SBR Short-Barrel Rifle, 9mm, 6in

The Angstadt Arms UDP-9 (brand part no. AAUDP09S06) is a 9mm short-barrel rifle machined from 7075-T6 billet aluminum, built for the same battle-tested reliability that’s put the UDP-9 in the hands of professionals and citizens in over 30 countries since 2014. A 6-inch chrome moly black melonite barrel with a 1/10 twist keeps this SBR compact, and its compatibility with most AR9 and AR15 parts and components means owners can upgrade and customize the platform easily. It’s built with a Radian Weapons ambidextrous Raptor LT charging handle, an Angstadt Arms EMT-9 trigger, and a Radian Weapons Talon ambidextrous safety selector, and it accepts Glock-pattern magazines, shipping with a 17-round magazine included.

Key Specifications

• Chambered in 9mm and built on Angstadt Arms’ 7075-T6 billet aluminum receiver set.
• Features a 6-inch chrome moly, black melonite barrel with a 1/10 twist.
• Weighs in at just under 5 pounds.
• Runs a straight blowback operating system.
• Fitted with a Radian Weapons ambidextrous Raptor LT charging handle.
• Equipped with the Angstadt Arms EMT-9 trigger and Radian Weapons Talon ambi safety.
• Accepts Glock-pattern magazines, shipping with a 17-round magazine.

Frequently Asked Questions

Is this an NFA item? Yes. As a short-barrel rifle (SBR), it’s a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

What magazines does it use? Glock-pattern magazines, with a 17-round magazine included.

What barrel length does it have? 6 inches, which is what classifies it as an SBR under the NFA.

Buy the Angstadt Arms UDP-9 SBR

This is a Title II item regulated under the National Firearms Act. Purchase requires an approved ATF Form 4, no federal transfer tax, and transfer through a licensed NFA (SOT/Class 3) dealer, with an extended federal approval wait before delivery. Order through Angstadt Arms‘s short barrel rifles lineup and our Lubbock, Texas team will walk you through the transfer process.