Davidson Defense Stoneveil w/Magpul BTR Brace 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit

Stoneveil Magpul BTR Brace 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-LOK Pistol Full Build Kit

The Stoneveil is a 5.56 NATO AR-15 Full Build Kit built around a compact 11.5-inch carbine-length gas platform. The kit centers on an 11.5-inch M4 profile phosphate barrel with a 1:7 twist rate and 1/2x28 thread pitch, paired with an A2 GI birdcage flash hider compatible with 5.56 NATO and .223 Remington, and a black 1/2-inch crush washer. A micro low-profile steel gas block at 0.750 diameter and a carbine-length stainless steel gas tube are included on the front end. The 7075-T6 aluminum hardcoat anodized upper receiver features M4 feed ramps, a forward assist, and an ejection port door assembly, paired with a 10-inch freefloat M-LOK handguard featuring a full-length Picatinny top rail and integrated QD sling mounts. A USA-made complete AR-15 bolt carrier group compatible with 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend, and a Mil-Spec M4 charging handle complete the upper side. The lower hardware includes a complete Mil-Spec AR-15 lower parts kit, a Mil-Spec heavy-duty 6-position aluminum carbine buffer tube, a standard 3 oz carbine buffer, a USA-made standard carbine recoil spring, an M16 Mil-Spec end plate, and a Mil-Spec AR-15 carbine castle nut. The Magpul BTR pistol brace in black, compatible with standard Mil-Spec AR-15 buffer tubes, is included. Lower receiver not included.

Key Features

• 11.5-inch M4 profile phosphate barrel, 1:7 twist, 1/2x28 thread pitch, 5.56 NATO
• Carbine-length gas system
• Carbine-length stainless steel gas tube
• Micro low-profile steel gas block, 0.750
• A2 GI birdcage flash hider, 1/2x28, 5.56 NATO and .223 Remington compatible, black 1/2-inch crush washer included
• 7075-T6 aluminum upper receiver, hardcoat anodized, M4 feed ramps, forward assist, ejection port door assembly
• 10-inch freefloat M-LOK handguard, full-length Picatinny top rail, integrated QD sling mounts
• USA-made complete AR-15 bolt carrier group, 5.56 NATO and .223 Remington and .300 Blackout and .350 Legend compatible
• Mil-Spec M4 charging handle
• Complete Mil-Spec AR-15 lower parts kit
• Mil-Spec heavy-duty 6-position aluminum carbine buffer tube
• Standard carbine buffer, 3 oz
• Standard carbine recoil spring, made in USA
• M16 Mil-Spec end plate
• Mil-Spec AR-15 carbine castle nut
• Magpul BTR pistol brace, black, Mil-Spec AR-15 buffer tube compatible

Perfect For

• Builders sourcing a complete 5.56 NATO AR-15 pistol full build kit with a 7075-T6 hardcoat anodized upper receiver with forward assist, 11.5-inch phosphate M4 profile barrel, USA-made BCG, 10-inch freefloat M-LOK handguard with full-length Picatinny top rail and integrated QD sling mounts, and Magpul BTR brace on a Mil-Spec carbine buffer tube already included, pairing it with their own lower receiver
• Shooters building a compact 11.5-inch carbine-gas 5.56 NATO platform who want the USA-made BCG, charging handle, complete lower parts kit, and Magpul BTR brace covered in one kit with a freefloat M-LOK handguard featuring integrated QD sling mounts and a full-length Picatinny top rail
• AR-15 pistol builders who want a 5.56 NATO full build kit with a USA-made BCG compatible with multiple calibers and a Magpul BTR brace on a Mil-Spec carbine buffer tube without sourcing components separately

Barrel and Muzzle Device

The 11.5-inch M4 profile barrel is chambered in 5.56 NATO with a phosphate finish, 1:7 twist rate, and 1/2x28 thread pitch, which matches the included A2 GI birdcage flash hider, compatible with 5.56 NATO and .223 Remington. A black 1/2-inch crush washer, a micro low-profile steel gas block at 0.750 diameter, and a carbine-length stainless steel gas tube cover the front end gas configuration on this carbine-length platform.

Upper Receiver and Handguard

The 7075-T6 aluminum upper receiver carries a hardcoat anodized finish with M4 feed ramps, a forward assist, and an ejection port door assembly. The 10-inch freefloat M-LOK handguard features a full-length Picatinny top rail and integrated QD sling mounts, with M-LOK attachment points along the body for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-15 pistol platform.

Bolt Carrier Group and Charging Handle

The USA-made complete AR-15 bolt carrier group is compatible with 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend. A Mil-Spec M4 charging handle is included to complete the upper component set.

Lower Parts Kit and Buffer System

The complete Mil-Spec AR-15 lower parts kit covers the internal lower receiver components. The buffer system includes a Mil-Spec heavy-duty 6-position aluminum carbine buffer tube, a standard 3 oz carbine buffer, a USA-made standard carbine recoil spring, an M16 Mil-Spec end plate, and a Mil-Spec AR-15 carbine castle nut. The Magpul BTR pistol brace in black pairs with the included Mil-Spec carbine buffer tube and covers the rear brace interface for this pistol lower build kit.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Verify local and state laws regarding pistol brace use and classification.