Davidson Defense Ronin Competition 10.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit, SBR Ready

Davidson Defense Ronin Competition AR-15 Pistol Full Build Kit SBR Ready - 10.5-inch 5.56 NATO Carbine-Gas 1:7 Freefloat M-Lok Handguard

The Davidson Defense Ronin Competition is an AR-15 pistol full build kit chambered in 5.56 NATO with a 10.5-inch government profile barrel, offered in an SBR Ready configuration. The kit includes the upper assembly, bolt carrier group, charging handle, mil-spec heavy-duty 6-position buffer tube, 3 oz carbine buffer, carbine recoil spring, mil-spec receiver end plate, AR-15 carbine castle nut, and lower parts kit. This kit ships without a brace. The lower receiver is not included.

Key Features

• 10.5-inch 4150 CrMoV steel government profile barrel
• Phosphate barrel finish
• 1:7 twist rate
• 1-in-2x28 thread pitch
• Carbine-length gas system with .750 O.D. micro low-profile gas block
• 6061-T6 aluminum slick side billet upper receiver, USA made, with anti-rotation cutout
• Type 3 Class 2 hardcoat anodized upper receiver finish
• Freefloat M-Lok handguard in 6061-T6 aluminum
• Complete bolt carrier group in 9310 alloy steel, nitride finish
• Mil-spec M4 charging handle
• GI birdcage flash hider, 1-in-2x28 thread pitch
• Mil-spec heavy-duty 6-position buffer tube
• 3 oz carbine buffer and carbine recoil spring
• Mil-spec receiver end plate and AR-15 carbine castle nut
• SBR Ready configuration

Perfect For

• AR-15 pistol builders sourcing a complete SBR Ready kit around a 10.5-inch 5.56 NATO upper
• Builders completing a stripped mil-spec AR-15 lower receiver
• Shooters selecting their own brace or stock configuration
• Builders looking for a slick side billet upper receiver in a freefloat M-Lok configuration

Barrel and Gas System

The 10.5-inch government profile barrel is 4150 CrMoV steel with a phosphate finish and a 1:7 twist rate. The barrel handles the 5.56 NATO chamber and provides the threaded muzzle end for the included GI birdcage flash hider at a 1-in-2x28 thread pitch. The carbine-length gas system uses a .750 O.D. micro low-profile gas block, which sits beneath the handguard and keeps the forend profile clean and unobstructed.

Upper Receiver and Handguard

The slick side billet upper receiver is 6061-T6 aluminum with a Type 3 Class 2 hardcoat anodized finish and an anti-rotation cutout, manufactured in the USA. The slick side profile removes the forward assist and ejection port door provisions found on standard upper receivers, giving the build a cleaner exterior profile. The freefloat M-Lok handguard is 6061-T6 aluminum in black, providing a clean forend with M-Lok accessory slots for lights, grips, and other attachments. The handguard length matches the 10.5-inch barrel, with the muzzle device providing clearance beyond the handguard.

Bolt Carrier Group and Charging Handle

The included bolt carrier group is a complete AR-15 unit built from 9310 alloy steel with a nitride finish. It is compatible with 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend configurations. The mil-spec M4 charging handle completes the upper component set.

SBR Ready Configuration

This kit ships without a brace and is intended for builders selecting their own final rear end configuration. The mil-spec heavy-duty 6-position buffer tube, 3 oz carbine buffer, carbine recoil spring, mil-spec receiver end plate, and AR-15 carbine castle nut are all included to support the lower completion build. The SBR Ready designation means the brace selection is left to the builder, allowing for a custom setup based on individual configuration requirements.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Ships without a brace. Do not install a stock unless compliant with applicable laws.