Alexander Arms | ALEX PISTOL UPPER 50BEO 12 BLK

The Alexander Arms ALEX PISTOL UPPER 50BEO 12 BLK is a complete AR-style upper receiver assembly built around a 12-inch barrel and a flat-top receiver. It features a carbine-length A2-type handguard and a 1:20 twist rate, and uses a direct impingement operating system. The unit ships complete with a 49/64-20 TPI threaded muzzle and a single 7-round magazine, and is intended for use with a registered SBR or class III lower receiver; all NFA rules apply.

Applications: ideal for registered SBR-class builds and controlled-range precision or medium-range shooting scenarios.

Product Specifications

• The manufacturer is Alexander Arms.
• The model is ALEX PISTOL UPPER 50BEO 12 BLK.
• The barrel measures 12 inches.
• The receiver is a flat-top receiver.
• The handguard is a carbine-length A2-type handguard.
• The twist rate is 1:20.
• The operating system is direct impingement.
• The muzzle is threaded to 49/64-20 TPI.
• This item is a complete upper receiver assembly.
• The upper is compatible with any standard-specification lower receiver (no modifications required).
• This unit is intended for use with a registered SBR or class III lower receiver and is subject to applicable NFA regulations.
• The product ships with one 7-round magazine.
• Threaded muzzle devices are optional and must be selected as an upgrade.
• The category is AR15 Uppers.
• The UPC is 819511021561.

Built as a ready-to-integrate upper, this assembly delivers the fit and features expected for regulated short-barreled rifle builds and controlled-range applications. Its flat-top receiver and standard-spec compatibility make it straightforward to mount optics and mate with a compliant lower, while the threaded muzzle allows for user-specified muzzle devices when required. The package arrives complete so you can focus on lawful compliance and setup for your chosen use.