Davidson Defense Ronin Competition w/Magpul BTR Brace 6-inch 1:10 9MM AR-9 Freefloat M-Lok Handguard Pistol Full Build Kit

Davidson Defense Ronin Competition AR-9 Pistol Full Build Kit - 6-inch, 9mm, M-Lok Freefloat Handguard, Linear Compensator, Magpul BTR Brace

The Davidson Defense Ronin Competition is a 9mm AR-9 pistol full build kit built around a 6061-T6 billet aluminum upper receiver with a Type 3 Class 2 hardcoat anodized finish. The kit includes a 6-inch medium profile barrel in 4150 chrome moly vanadium steel with a nitride finish, a 1:10 twist rate, and a 1/2x28 thread pitch, a 7-inch freefloat M-Lok handguard in black aluminum with a partial Picatinny top rail section, a black knurled straight-fluted linear compensator at 1/2x28, a 9mm nitride-finished 8620 alloy steel bolt carrier group compatible with Glock and Colt pattern magazines with external extractor, a Mil-Spec M4 charging handle, a Magpul BTR black pistol brace compatible with standard Mil-Spec buffer tubes, a Mil-Spec heavy-duty 6-position buffer tube, a 5.5 oz buffer, a recoil spring, an end plate, and a castle nut. Lower receiver not included.

Key Features

• 6061-T6 billet aluminum upper receiver, Type 3 Class 2 hardcoat anodized finish
• 6-inch medium profile barrel, 4150 chrome moly vanadium, nitride finish
• 9mm
• 1:10 twist rate
• 1/2x28 thread pitch
• 7-inch freefloat M-Lok handguard, black aluminum, partial Picatinny top rail section
• Black knurled straight-fluted linear compensator, 1/2x28
• 9mm 8620 alloy steel bolt carrier group, nitride finish, Glock and Colt magazine compatible, external extractor
• Mil-Spec M4 charging handle
• Magpul BTR black pistol brace, Mil-Spec buffer tube compatible
• Mil-Spec heavy-duty 6-position buffer tube
• 5.5 oz buffer
• Recoil spring
• End plate
• Castle nut
• Lower receiver not included

Perfect For

• AR-9 pistol builders sourcing a complete 9mm full build kit with the Magpul BTR brace in a compact 6-inch configuration
• Shooters pairing this kit with an existing AR-9 lower receiver compatible with Glock or Colt pattern magazines
• Builders looking for a compact 9mm pistol build kit with a linear compensator and Magpul BTR brace included

Barrel and Muzzle Device

The barrel is a 6-inch medium profile unit in 4150 chrome moly vanadium steel with a nitride finish, chambered in 9mm with a 1:10 twist rate and a 1/2x28 thread pitch. A black knurled straight-fluted linear compensator at 1/2x28 covers the muzzle end of this build kit.

Upper Receiver and Handguard

The 6061-T6 billet upper receiver features a Type 3 Class 2 hardcoat anodized finish, forming the structural core of the upper assembly. The 7-inch freefloat M-Lok handguard is black aluminum with a partial Picatinny top rail section, surrounding the barrel without contact and providing M-Lok mounting positions and a top rail segment for compatible accessories.

Bolt Carrier Group and Charging Handle

The included 9mm bolt carrier group is 8620 alloy steel with a nitride finish, compatible with Glock and Colt pattern magazines via an external extractor design. The BCG and Mil-Spec M4 charging handle work together to cycle the action and complete the upper side component set.

Brace and Buffer System

The Magpul BTR black pistol brace is compatible with standard Mil-Spec buffer tubes and is included with a Mil-Spec heavy-duty 6-position buffer tube. The buffer system consists of a 5.5 oz buffer and a recoil spring. An end plate and castle nut complete the rear hardware included with this full build kit.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included.