Davidson Defense Reentry 4.5-inch 1:10 9MM AR-9 Freefloat M-Lok Handguard Pistol Full Build Kit, SBR Ready

Reentry 4.5-inch 1:10 9mm AR-9 M-Lok Pistol Full Build Kit SBR Ready

The Reentry 4.5-inch 1:10 9mm AR-9 M-Lok Pistol Full Build Kit SBR Ready from Davidson Defense is a pistol-format full build kit for the AR-9 platform chambered in 9mm. The kit includes a 4.5-inch medium-profile barrel, a black aluminum freefloat M-Lok handguard, a 7075-T6 anodized upper receiver, an A2 birdcage flash hider, a 9mm 8620 alloy steel bolt carrier group, a mil-spec charging handle, a lower parts kit, a buffer tube, a 5.5 oz buffer, recoil spring, and a mil-spec receiver end plate. This kit ships without a brace. The lower receiver is not included.

Key Features

• 4.5-inch 4150 CrMoV medium-profile barrel in 9mm with 1:10 twist rate
• Nitride barrel finish
• 1/2x36 muzzle thread pitch
• A2 birdcage flash hider, 1/2x36 TPI
• Black aluminum freefloat M-Lok handguard
• 7075-T6 anodized aluminum upper receiver
• 9mm 8620 alloy steel bolt carrier group with nitride finish
• Mil-spec AR-15 charging handle
• Buffer tube with 5.5 oz buffer weight, recoil spring, and mil-spec receiver end plate included
• Lower parts kit included
• SBR Ready configuration

Perfect For

• Builders seeking a compact 9mm AR-9 pistol-format kit without a brace
• Shooters selecting their own brace or final configuration
• Builders prioritizing a freefloat M-Lok handguard on the AR-9 platform
• Those pursuing a customizable SBR Ready 9mm pistol build

Barrel and Handguard

The 4.5-inch barrel is chambered in 9mm and constructed from 4150 CrMoV steel with a medium profile and a 1:10 twist rate. The nitride finish covers the full barrel surface for corrosion and wear resistance. The muzzle is threaded 1/2x36 and includes an A2 birdcage flash hider. The black aluminum freefloat M-Lok handguard provides M-Lok slot access along its length for accessory mounting. The AR-9 platform operates on blowback, with no gas system components in this configuration.

Upper Receiver and Bolt Carrier Group

The upper receiver is machined from 7075-T6 aluminum with an anodized finish. The 9mm bolt carrier group is constructed from 8620 alloy steel with a nitride finish and is specific to the AR-9 platform. The included mil-spec AR-15 charging handle meets mil-spec dimensional standards for use with the upper receiver included in this kit.

SBR Ready Configuration

This kit ships without a brace. The SBR Ready designation indicates the kit is configured for customers who intend to select their own brace or make their own final configuration decisions. All other kit components are included as listed. The final configuration is dependent on the brace or accessory the buyer selects separately.

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 attach a stock unless compliant with applicable laws.