Update, October 9, 2026: ATF no longer requires a Form 4, tax stamp, fingerprints or registration for suppressors, short-barreled rifles, short-barreled shotguns or AOWs. They now transfer on a standard Form 4473 with a background check. Anything below that mentions a Form 4, a wait or a tax stamp was written before this change. What changed
The Ang-AAUDP09C-SBR is a 9mm short-barreled rifle regulated as an NFA item under federal law. This configuration requires an approved ATF Form 4 before you can take possession.
Short-barreled rifles in 9mm offer compact dimensions suited to close-quarters use while maintaining the stability and control of a rifle platform. The 9mm cartridge produces manageable recoil and runs reliably through a wide range of ammunition.
Key Facts
SKU: Ang-AAUDP09C-SBR
Caliber: 9mm
NFA Status: Short-barreled rifle requiring ATF Form 4
Product Code: Ang-AAUDP09C-SBR
What Makes an SBR Different from a Pistol
A short-barreled rifle is legally defined as a rifle with a barrel shorter than 16 inches or an overall length under 26 inches. Unlike a pistol, an SBR is designed to be fired from the shoulder using a stock.
Because it falls under the National Firearms Act, you must submit ATF Form 4, pay the transfer tax, and wait for approval before taking possession. An approved ATF Form 4 is required before you take possession; see our NFA wait times guide for current approval times.
9mm in an SBR Platform
The 9mm cartridge pairs well with short-barreled platforms because it does not rely on barrel length to stabilize or achieve effective terminal performance. Velocity loss from a shorter barrel is less critical than with rifle calibers.
This caliber also offers lower cost per round than most rifle cartridges and reduced report compared to centerfire rifle rounds. Many shooters appreciate the ability to use the same ammunition across multiple firearms.
Ordering from Western Sport
Order online and we ship it to the licensed FFL dealer you choose near you — see how buying a gun online works. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.
Frequently Asked Questions
What is the Ang-AAUDP09C-SBR?
The Ang-AAUDP09C-SBR is a 9mm short-barreled rifle regulated under the National Firearms Act. It requires an approved ATF Form 4 and payment of the transfer tax before you can take possession.
How long does the NFA transfer process take?
ATF approval times for Form 4 transfers vary throughout the year. An approved ATF Form 4 is required before you take possession; see our NFA wait times guide for current approval times.
Can I configure this SBR with different accessories?
Most SBRs accept optics, lights, slings, and other accessories via standard mounting systems. Send us a message to confirm specific compatibility and mounting options for the Ang-AAUDP09C-SBR.
What are the advantages of 9mm in a short-barreled rifle?
9mm performs well in short barrels because it does not depend on high velocity for terminal effect. The cartridge is also widely available, affordable, and produces less concussion than rifle calibers in confined spaces.
Do I need a tax stamp for the Ang-AAUDP09C-SBR?
Yes, you must submit ATF Form 4, pay the transfer tax, and receive approval before taking possession of this short-barreled rifle. Western Sport handles the paperwork as part of the transfer process.
Who should I contact to purchase this SBR in Texas?
We are a licensed FFL/SOT dealer, with gunsmithing services on site.
Last round bolt hold open on an empty magazine
Flared magwell for faster reloads
Integrated, oversized trigger guard
7075-T6 billet aluminum lower with a matte black hard-coat anodized finish
7075-T6 billet aluminum slick side upper receiver with appropriately sized ejection port and no forward assist or dust cover
Threaded bolt catch screw
9mm bolt assembly for use with a standard AR-15 hammer
6” 9mm barrel in chrome moly with a 1/10 twist, black melonite finish and A2 style flash suppressor
Barrel is threaded 1/2×36 and can accept a suppressor
Magpul MOE stock and Magpul K2 pistol grip
Angstadt Arms 5.5” free float M-LOK hand guard with a modern, ergonomic, 7 side design that allows for 45 degree offset mounting options
Continuous top mil-spec 1913 picatinny rail
Weight: Sub 5lbs
Length: 24″
Patent pending
Accepts all Glock® aftermarket magazines. We recommend using factory Glock® magazines
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