Davidson Defense Stoneveil 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit

Stoneveil 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-LOK Pistol Upper Build Kit

The Stoneveil is a 5.56 NATO AR-15 Upper 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. BCG and charging handle are 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
• BCG and charging handle not included

Perfect For

• Builders sourcing a compact 5.56 NATO AR-15 pistol upper build kit with a 7075-T6 hardcoat anodized upper receiver with forward assist, 11.5-inch phosphate M4 profile barrel, and 10-inch freefloat M-LOK handguard with full-length Picatinny top rail and integrated QD sling mounts, pairing it with their own bolt carrier group and charging handle
• Shooters building a compact 11.5-inch carbine-gas 5.56 NATO platform who prefer to select their own BCG while having the phosphate M4 profile barrel, hardcoat anodized upper receiver with forward assist and M4 feed ramps, and freefloat M-LOK handguard with integrated QD sling mounts covered in one kit
• AR-15 pistol builders who want a 5.56 NATO upper build kit with a 10-inch freefloat M-LOK handguard featuring a full-length Picatinny top rail and integrated QD sling mounts 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.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. BCG and charging handle are not included.