Davidson Defense DARCness 18-inch Rifle-Gas 1:7 22 ARC AR-15 Quad-Rail Handguard Rifle Full Build Kit

DARCness 18-inch Rifle-Gas 1:7 22 ARC AR-15 Quad-Rail Handguard Rifle Full Build Kit

The DARCness 22 ARC full build kit delivers a complete rifle platform built around the efficient and accurate 22 ARC cartridge. This kit pairs an 18-inch 416R stainless steel barrel with a 1:7 twist rate, rifle-length gas system, and a 15-inch free-float quad-rail handguard. You get a precision-focused upper assembly matched with mil-spec lower components, a complete bolt carrier group, charging handle, and an Adaptive Tactical adjustable stock. The lower receiver is not included.

Key Features

• 18-inch 416R stainless steel barrel with 1:7 twist for 22 ARC precision
• Rifle-length gas system with micro low-profile gas block for reliable cycling
• 15-inch free-float quad-rail handguard for stable shooting and accessory mounting
• 7075-T6 aluminum upper receiver with anodized black finish
• Complete mil-spec lower parts kit with Adaptive Tactical EX Performance adjustable stock
• AR-15 6.5 Grendel II bolt carrier group with QPQ nitride finish
• Mil-spec heavy-duty buffer tube with standard carbine recoil spring and buffer
• Linear compensator with 1/2x28 thread compatibility

Perfect For

• Precision shooters building a dedicated 22 ARC platform
• Builders seeking a complete upper and lower assembly solution
• Long-range target and varmint hunting applications
• Shooters valuing stainless steel barrel durability and accuracy

22 ARC Platform and Precision Focus

The 22 ARC cartridge delivers flat trajectory and minimal recoil while maintaining energy downrange, making it ideal for precision shooting and hunting applications. This kit builds that platform with a heavy-profile barrel and 1:7 twist rate optimized for the cartridge's ballistic performance. The rifle-length gas system ensures reliable cycling without excessive wear on components.

Free-Float Quad-Rail Design

The 15-inch free-float quad-rail handguard isolates the barrel from external pressure, which improves shot-to-shot consistency. Quad-rail geometry provides mounting points on all four sides for optics, lights, lasers, and other tactical accessories. The design maintains the handguard clear of the barrel, allowing natural vibration without mechanical interference.

Complete Lower Assembly with Adjustable Stock

This kit includes a complete mil-spec lower parts kit paired with an Adaptive Tactical EX Performance adjustable stock. The stock features adjustable length of pull, QD sling mounts, and a sling loop for field use. The mil-spec heavy-duty buffer tube, standard carbine recoil spring, and 3-ounce buffer provide reliable cycling matched to the rifle-length gas system.

Stainless Steel Barrel and Corrosion Resistance

The 416R stainless steel barrel resists corrosion and maintains accuracy over extended shooting sessions. The heavy profile absorbs heat and reduces barrel vibration, supporting precision at distance. The 1/2x28 muzzle thread accommodates standard 5.56 / .223 compatible devices, including the included linear compensator.

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.