AR-15 5.56/.223 Compression Series Micro Pistol Kit – 5" Barrel, SBA3 Brace, M-LOK Ready

Build Kits

AR-15 5.56 NATO 5” Micro Pistol Kit w/ SBA3 Brace – Compression Series, No Lower

Push the limits of compact AR performance with the AR-15 5.56/.223 5” Compression Series Micro Pistol Kit by Moriarti Armaments. Designed for maximum maneuverability in close-quarters environments, this ultra-short pistol kit gives you everything you need to build your AR pistol—except the stripped lower.

At its core is a 5” 4150 chrome moly barrel, chambered in 5.56 NATO/.223 Rem, featuring an aggressive 1:5 twist rate for enhanced projectile stabilization in short-barrel platforms. Paired with a micro-length gas system, low-profile gas block, and thread protector muzzle, this build is as clean as it is functional.

The 4” M-LOK free-float handguard offers just enough space for mission-critical accessories without adding bulk. The forged 7075-T6 upper receiver comes complete with a mil-spec dust cover and forward assist, ensuring rock-solid durability.

To complete the rear, this kit features the SBA3 pistol brace, a mil-spec receiver extension, and a full buffer kit. Also included is a complete AR-15 mil-spec lower parts kit, ready to install into your lower (sold separately).

Kit Includes:

NOTE: Images may not be an exact representation of the product. This kit comes unassembled and does not include a lower receiver.