Davidson Defense Gladius w/Magpul BTR Brace 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat Tubular M-Lok Handguard Pistol Full Build Kit

Gladius 10.5-inch .300 BLK AR-15 Pistol Full Build Kit with Magpul BTR Brace

The Gladius 10.5-inch .300 BLK AR-15 Pistol Full Build Kit includes a complete component set built around a 10.5-inch pistol-gas barrel chambered in .300 Blackout. The barrel features 4150 CrMoV steel construction, a phosphate finish, an HBAR profile, a 1:8 twist rate, and a 5/8x24 thread pitch. A stainless pistol-length gas tube and micro low-profile .750 O.D. barrel steel gas block are included. The 7075-T6 aluminum upper receiver carries an anodized finish with M4 feed ramps. A tubular M-LOK freefloat aluminum handguard and a GI birdcage flash hider with manganese phosphate finish and 5/8x24 threading complete the upper component set. The kit also includes a Magpul BTR pistol brace in black, a mil-spec heavy-duty 6-position aluminum buffer tube, a 3 oz carbine recoil buffer, a standard carbine-length spring steel recoil spring, a phosphate-finish metal end plate, a 9310 alloy steel bolt carrier group with a nitride finish, and an M4 mil-spec charging handle. Lower receiver not included.

Key Features

• 10.5-inch HBAR .300 Blackout barrel, 4150 CrMoV steel, phosphate finish
• 1:8 twist rate, pistol-gas system, 5/8x24 thread pitch
• Stainless pistol-length gas tube, micro low-profile .750 O.D. barrel steel gas block
• 7075-T6 anodized aluminum upper receiver with M4 feed ramps
• Tubular M-LOK freefloat aluminum handguard
• GI birdcage flash hider, manganese phosphate finish, 5/8x24 threading
• Magpul BTR pistol brace, black
• Mil-spec heavy-duty 6-position aluminum buffer tube
• 3 oz carbine recoil buffer, standard carbine-length spring steel recoil spring
• Phosphate-finish metal end plate
• 9310 alloy steel bolt carrier group, nitride finish
• M4 mil-spec charging handle

Perfect For

• AR-15 pistol builds in .300 Blackout
• Builders sourcing a complete component set around a 10.5-inch pistol-gas configuration
• Short-barreled .300 BLK platform builds requiring a Magpul BTR brace setup
• Gunsmiths pairing a nitride BCG with a fully specified buffer and brace package

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. A stainless pistol-length gas tube is included alongside the micro low-profile barrel steel gas block. The 7075-T6 aluminum upper receiver carries an anodized finish and M4 feed ramps.

Handguard and Muzzle Device

The tubular M-LOK freefloat handguard is aluminum construction with full-length M-LOK slot access around the tube for accessory attachment. The included GI birdcage flash hider carries a manganese phosphate finish and a 5/8x24 thread pitch, listed as compatible with .308, 7.62x39, and .300 Blackout configurations.

Brace, Buffer System, and Bolt Carrier Group

The Magpul BTR pistol brace in black pairs with the mil-spec heavy-duty 6-position aluminum buffer tube included in this kit. The buffer system consists of a 3 oz carbine recoil buffer and a standard carbine-length spring steel recoil spring. The end plate is metal construction with a phosphate finish in black. The bolt carrier group is 9310 alloy steel with a nitride finish, with compatibility spanning 5.56, .223, .300 Blackout, and .350 platforms. The M4 mil-spec charging handle is also included.

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