Pistol caliber carbines seem to be all the rage currently. While there are exceptions like the Kel-Tec Sub-2000, many of the guns are built on the AR platform. Most of those guns are chambered for the 9mm cartridge, though some are available in other calibers.

Colt pattern magazines have been the standard for 9mm AR carbines since the 80s. However, in recent years, more and more companies have built custom lowers that accept Glock pattern magazines. One of those companies is Angstadt Arms.

Angstadt Arms recently added a new Glock compatible lower to its offerings: one that accepts double-stack Glock .45 ACP magazines.

The company’s 1045 lower receiver is machined from 7075-T6 aluminum and has a hard coat black anodized finish.It is designed to work with a standard hammer as well as all of the other standard AR-15 parts. A .45 ACP bolt carrier assembly will obviously be needed.

Yes, this lower does hold open on an empty magazine. This was a problem on some Glock magazine AR lowers in the past, but not an issue with Angstadt Arms products.

The company also offers a matched upper with an oversized ejection port that is said to increase the reliability of ejection.

The stripped lower weighs 10.8 ounces and includes a flared magazine well and oversized trigger guard. Alone, it sells for $279.

The upper is made of 7075-T6 aluminum and weighs 6.5 ounces. The lower set has a price of $469.