Davidson Defense Gladius 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat Tubular M-Lok Handguard Pistol Full Build Kit, SBR Ready

Gladius 10.5-inch .300 BLK AR-15 Pistol Full Build Kit, SBR Ready

The Gladius 10.5-inch .300 BLK AR-15 Pistol Full Build Kit is an SBR Ready configuration built around a 10.5-inch pistol-gas barrel chambered in .300 Blackout. This kit ships without a brace and is intended for customers selecting their own final setup. The barrel features 4150 CrMoV steel construction, a phosphate finish, an HBAR profile, a 1:8 twist rate, and a 5/8x24 thread pitch. The 7075-T6 aluminum upper receiver carries an anodized finish with M4 feed ramps. A tubular M-LOK freefloat aluminum handguard in black, a micro low-profile .750 O.D. barrel steel gas block, and a GI birdcage flash hider with 5/8x24 threading complete the upper component set. The kit also includes a 9310 alloy steel bolt carrier group with a nitride finish, an M4 mil-spec charging handle, a mil-spec heavy-duty 6-position buffer tube, a 3 oz buffer, and a lower parts kit with recoil spring, castle nut, and end plate. Lower receiver not included.

Key Features

• SBR Ready configuration, ships without a brace
• 10.5-inch HBAR .300 Blackout barrel, 4150 CrMoV steel, phosphate finish
• 1:8 twist rate, pistol-gas system, 5/8x24 thread pitch
• 7075-T6 anodized aluminum upper receiver with M4 feed ramps
• Tubular M-LOK freefloat aluminum handguard, black
• Micro low-profile .750 O.D. barrel steel gas block
• GI birdcage flash hider, 5/8x24 threading
• 9310 alloy steel bolt carrier group, nitride finish
• M4 mil-spec charging handle
• Mil-spec heavy-duty 6-position buffer tube, 3 oz buffer

Perfect For

• SBR Ready .300 Blackout builds requiring a configuration-based brace or stock selection
• AR-15 pistol builds in .300 Blackout
• Builders sourcing a complete component set around a 10.5-inch pistol-gas configuration
• Gunsmiths pairing a nitride BCG with a fully specified SBR Ready upper and buffer package

SBR Ready Configuration

This kit is SBR Ready and ships without a brace. The configuration is intended for customers selecting their own final setup. The mil-spec heavy-duty 6-position buffer tube and 3 oz buffer are included as part of the lower component set. Do not install a stock unless compliant with applicable laws.

Barrel and Upper Receiver

The 10.5-inch barrel is chambered in .300 Blackout with a pistol-gas configuration and a .750 O.D. low-profile gas block seat. The HBAR profile adds mass along the barrel body, and the 4150 CrMoV steel construction carries a phosphate finish. A 1:8 twist rate is standard across this barrel, and the muzzle end is threaded at 5/8x24. The 7075-T6 aluminum upper receiver carries an anodized finish and M4 feed ramps.

Handguard, Muzzle Device, and Bolt Carrier Group

The tubular M-LOK freefloat handguard in black is aluminum construction with full-length M-LOK slot access around the tube for accessory attachment. The micro low-profile gas block measures .750 O.D. in barrel steel construction. The included GI birdcage flash hider carries a 5/8x24 thread pitch, listed as compatible with .308, 7.62x39, and .300 Blackout configurations. The bolt carrier group is 9310 alloy steel with a nitride finish, with compatibility spanning 5.56, .223, .300 Blackout, and .350 platforms.

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.