Davidson Defense Dwarf King AR-15 Pistol Build Kit, 4.5-Inch 1:7 300 BLK, SBA6 Brace, Dirty .30

Dwarf King with SBA6 Brace 4.5-inch 1:7 300 BLK AR-15 M-LOK Pistol Full Build Kit

This is a complete .300 Blackout AR-15 pistol platform built around a 4.5-inch 1:7 twist barrel paired with a Witt Machine The Dirty .30 suppressor. The kit ships with everything needed to complete a functional rifle except the lower receiver, including a billet upper receiver, freefloat M-LOK handguard, adjustable gas block, SBA6 brace, complete bolt carrier group, charging handle, lower parts kit, and buffer system components. The .300 Blackout platform excels with subsonic ammunition, making this configuration ideal for suppressed shooting where the shorter barrel length and slower twist rate optimize bullet stability and cycling.

Key Features

• 4.5-inch Bear Creek Arsenal barrel in 4150 CrMoV steel with 1:7 twist rate optimized for .300 Blackout subsonic loads
• Panhead billet upper receiver with enlarged .458-style ejection port and no forward assist
• Freefloat 7-inch M-LOK aluminum handguard with 1.77-inch internal diameter for suppressor integration
• Adjustable skeletonized clamp-on gas block with .750-inch journal diameter
• Complete mil-spec bolt carrier group made in the USA, compatible with 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend
• SB Tactical SBA6 brace with 5-position adjustability in black
• Witt Machine The Dirty .30 suppressor in 416 stainless steel with graphite black Cerakote finish
• Heavy-duty mil-spec buffer tube with standard 3 oz carbine buffer and recoil spring
• Complete mil-spec lower parts kit with fire control group included

Perfect For

• Suppressed .300 Blackout shooting with subsonic ammunition
• Compact pistol-platform builds prioritizing maneuverability
• Shooters seeking integrated suppressor-ready configuration
• Precision shooting with slower twist rates optimized for heavier subsonic rounds
• Builders wanting a complete kit without selecting individual components

Suppressor-Ready Configuration

This kit is built around suppressor integration from the ground up. The 7-inch M-LOK handguard features a 1.77-inch internal diameter that accommodates the Witt Machine The Dirty .30 suppressor with clearance. The 4.5-inch barrel with 5/8x24 threading accepts the included suppressor directly. The micro-length gas system and adjustable gas block allow you to tune cycling for both suppressed and unsuppressed fire, making this platform versatile for different ammunition types and operational preferences.

The Dirty .30 Suppressor Specifications

The Witt Machine The Dirty .30 measures 4 inches in length and is constructed from 416 stainless steel with a graphite black Cerakote finish. The suppressor uses 5/8x24 threading, matching the barrel's muzzle thread pitch. This .30 caliber suppressor is rated for .300 Blackout and compatible with other .30 caliber cartridges. The compact design complements the short barrel length while maintaining effective sound reduction for subsonic ammunition.

Complete Kit Component Breakdown

This full build kit includes the upper assembly with barrel, handguard, and bolt carrier group, along with the charging handle, lower parts kit, buffer tube, buffer, recoil spring, end plate, castle nut, and SBA6 brace. The only component required to complete the rifle is a stripped lower receiver, which is not included in this kit.

Lower receiver not included. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Verify suppressor compatibility before use. Ensure secure mounting before operation. Use only in accordance with applicable laws. May Dropship from Davidson Defense.