Davidson Defense Gladius w/SBA5 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 SB Tactical SBA5 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. The 7075 T6 aluminum upper receiver carries an anodized finish with M4 feed ramps. A tubular M-LOK freefloat aluminum handguard, a micro low-profile .750 O.D. steel gas block with a phosphate finish, and a GI birdcage flash hider with 5/8x24 threading complete the upper component set. The kit also includes an SB Tactical SBA5 pistol stabilizing brace in nylon-reinforced polymer, a bolt carrier group with a 9310 alloy steel bolt head, an 8620 alloy steel body, and a nitride finish, an M4 mil-spec charging handle, and a lower parts kit with buffer tube, buffer, recoil spring, castle nut, and end plate. 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
• 7075 T6 anodized aluminum upper receiver with M4 feed ramps
• Tubular M-LOK freefloat aluminum handguard
• Micro low-profile .750 O.D. steel gas block, phosphate finish
• GI birdcage flash hider, 5/8x24 threading
• SB Tactical SBA5 pistol stabilizing brace, nylon-reinforced polymer
• Bolt carrier group, 9310 alloy steel bolt head, 8620 alloy steel body, nitride finish
• M4 mil-spec charging handle
• Complete lower parts kit with buffer tube, buffer, recoil spring, castle nut, and end plate

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 an SB Tactical brace setup
• Gunsmiths and builders pairing a dual-alloy nitride BCG with a .300 BLK pistol kit

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 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 micro low-profile gas block measures .750 O.D. in steel construction with a phosphate finish. The included GI birdcage flash hider carries a 5/8x24 thread pitch and is listed as compatible with .308, 7.62x39, and .300 Blackout configurations.

Brace and Bolt Carrier Group

The SB Tactical SBA5 pistol stabilizing brace is nylon-reinforced polymer construction and pairs with the mil-spec buffer tube. The bolt carrier group uses a 9310 alloy steel bolt head and an 8620 alloy steel body, both with a nitride finish. Compatibility spans 5.56, .223, .300 Blackout, and .350 platforms. The M4 mil-spec charging handle and a complete lower parts kit with buffer, recoil spring, castle nut, and end plate are also included.

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