Davidson Defense Longshot 18-inch Mid-Gas 1:10 .308 Win AR-10 KeyMod Rifle Full Build Kit

Longshot 18-Inch Mid-Gas 1:10 .308 Win AR-10 KeyMod Rifle Full Build Kit

Complete AR-10 rifle build kit in .308 Winchester with an 18-inch 4150 CrMoV barrel, 1:10 twist rate, and free-float 15-inch KeyMod handguard. This full build kit includes everything except the lower receiver, giving you the upper assembly, bolt carrier group, charging handle, lower parts kit, buffer system components, and Adaptive Tactical adjustable stock. The mid-length gas system delivers reliable cycling, and the nitride BCG handles .308 Winchester, 6.5 Creedmoor, and .243 Winchester ammunition.

Key Features

• 18-inch 4150 CrMoV barrel with 1:10 twist rate for .308 Winchester accuracy
• Free-float 15-inch KeyMod handguard for precision shooting and accessory mounting
• Nitride bolt carrier group compatible with .308 Winchester, 6.5 Creedmoor, and .243 Winchester
• Mid-length gas system with micro low-profile gas block for reliable cycling
• Adaptive Tactical adjustable stock with 6-position buffer tube for fit and control
• Steel flash can muzzle device with 5/8x24 thread pitch
• LR-308 high-profile upper receiver with black anodized finish

Perfect For

• Precision rifle builders looking for a complete upper assembly and lower parts kit in one purchase
• Shooters wanting a mid-length gas system for reduced recoil and faster target transitions
• Builders who prefer free-float handguards for improved accuracy potential
• .308 Winchester shooters seeking a reliable, adjustable carbine configuration

Longshot Barrel and Mid-Length Gas System

The Longshot barrel is a 4150 CrMoV steel tube with manganese phosphate finish, designed for durability in field conditions. The 1:10 twist rate stabilizes standard .308 Winchester loads effectively. Mid-length gas systems reduce felt recoil compared to rifle-length configurations while maintaining reliable bolt carrier cycling across a wide range of ammunition types. The micro low-profile gas block sits low on the barrel, preserving sight line clearance and minimizing profile.

Free-Float KeyMod Handguard and Accessory Ecosystem

The 15-inch KeyMod handguard floats independently from the barrel, eliminating contact that can affect accuracy. KeyMod slots run along the handguard, allowing you to attach lights, grips, and other tactical accessories without rail clutter. The handguard is specifically designed for the LR-308 platform and maintains compatibility with high-profile upper receivers.

Nitride BCG and Cross-Caliber Compatibility

The Recoil Technologies bolt carrier group features nitride finish for corrosion resistance and durability. This BCG handles .308 Winchester as the primary caliber while also supporting 6.5 Creedmoor and .243 Winchester ammunition, giving you flexibility if you decide to use alternative loads. The nitride coating reduces maintenance compared to standard phosphate finishes.

Complete Lower Components and Adjustable Stock

This full build kit includes the Recoil Technologies lower parts kit with all internal trigger and hammer components, the buffer system with 17-7 stainless steel extra-power spring, and the Adaptive Tactical adjustable stock. The 6-position buffer tube allows you to adjust length of pull for different shooting positions and gear configurations. The stock provides a solid cheekweld and comfortable controls.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. BCG and charging handle are included with this full build kit.