Davidson Defense Starlance 18-inch Mid-Gas 1:10 .308 Win AR-10 Freefloat M-Lok Handguard Rifle Upper Build Kit

Starlance 18-inch Mid-Gas 1:10 .308 Win AR-10 Freefloat M-LOK Rifle Upper Build Kit

The Starlance is a .308 Winchester AR-10 Upper Build Kit built around an 18-inch mid-length gas platform. The kit centers on an 18-inch contour profile 4150 CrMoV steel barrel with a manganese phosphate finish, 1:10 twist rate, and 5/8x24 thread pitch, paired with a nitride flash and sound forwarder and a black 5/8-inch crush washer. A micro low-profile steel gas block at 0.750 diameter and a mid-length stainless steel gas tube are included on the front end. The AR-10 high profile black anodized upper receiver features a forward assist and an LR-308 ejection port door assembly, paired with a 15-inch Crest Series high profile LR-308 freefloat M-LOK handguard with a continuous top Picatinny rail, a partial bottom Picatinny rail section, and M-LOK slots at the 3, 6, and 9 o'clock positions. BCG and charging handle are not included.

Key Features

• 18-inch contour profile 4150 CrMoV steel barrel, manganese phosphate finish, 1:10 twist, 5/8x24 thread pitch, .308 Winchester
• Mid-length gas system
• Mid-length stainless steel gas tube
• Micro low-profile steel gas block, 0.750
• Nitride flash and sound forwarder, 5/8x24, black 5/8-inch crush washer included
• AR-10 high profile upper receiver, black anodized, forward assist, LR-308 ejection port door assembly
• 15-inch Crest Series high profile LR-308 freefloat M-LOK handguard, continuous top Picatinny rail, partial bottom Picatinny rail section, M-LOK slots at 3, 6, and 9 o'clock positions
• BCG and charging handle not included

Perfect For

• Builders sourcing a .308 Winchester AR-10 upper build kit with an 18-inch manganese phosphate 4150 CrMoV contour profile barrel, AR-10 high profile black anodized upper receiver with forward assist, and 15-inch Crest Series LR-308 freefloat M-LOK handguard with continuous top Picatinny rail and partial bottom rail section, pairing it with their own LR-308 bolt carrier group and charging handle
• Shooters building an 18-inch mid-gas .308 Winchester AR-10 rifle platform who prefer to select their own BCG while having the manganese phosphate contour profile barrel, AR-10 high profile black anodized upper receiver with forward assist, and Crest Series high profile LR-308 freefloat M-LOK handguard covered in one kit
• AR-10 builders who want a .308 Winchester upper build kit with a nitride flash and sound forwarder and a 15-inch Crest Series LR-308 freefloat M-LOK handguard without sourcing components separately

Barrel and Muzzle Device

The 18-inch contour profile barrel is chambered in .308 Winchester and constructed from 4150 CrMoV steel with a manganese phosphate finish. The twist rate is 1:10 and the thread pitch is 5/8x24, which matches the included nitride flash and sound forwarder. A black 5/8-inch crush washer, a micro low-profile steel gas block at 0.750 diameter, and a mid-length stainless steel gas tube cover the front end gas configuration on this mid-length platform.

Upper Receiver and Handguard

The AR-10 high profile upper receiver carries a black anodized finish with a forward assist and an LR-308 ejection port door assembly. The 15-inch Crest Series high profile LR-308 freefloat M-LOK handguard features a continuous top Picatinny rail, a partial bottom Picatinny rail section, and M-LOK slots at the 3, 6, and 9 o'clock positions for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-10 platform.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. BCG and charging handle are not included. Verify compatibility with your specific .308 Winchester AR-10 lower receiver and bolt carrier group before use.