Davidson Defense Nightwatch 16-inch Carbine-Gas 1:8 .223 Wylde AR-15 Freefloat M-Lok Handguard Rifle Upper Build Kit

Nightwatch 16-inch Carbine-Gas 1:8 .223 Wylde AR-15 Freefloat M-LOK Upper Build Kit

The Nightwatch is a .223 Wylde AR-15 Upper Build Kit built around a 16-inch carbine-length gas platform. The kit centers on a 16-inch straight profile 4150 steel barrel with a black nitride finish, 1:8 twist rate, and 1/2x28 thread pitch, paired with an A2 birdcage flash hider and a black crush washer. A micro low-profile steel gas block at 0.750 journal diameter and a carbine-length stainless steel gas tube are included on the front end. The USA-made slick side billet 6061 aluminum upper receiver features an anti-rotation cutout and no forward assist housing, paired with a 15-inch freefloat M-LOK handguard featuring a full-length Picatinny top rail and integrated QD sling mounts with no anti-rotation tabs. BCG and charging handle are not included.

Key Features

• 16-inch straight profile 4150 steel barrel, black nitride finish, 1:8 twist, 1/2x28 thread pitch, .223 Wylde
• Carbine-length gas system
• Carbine-length stainless steel gas tube
• Micro low-profile steel gas block, 0.750 journal
• A2 birdcage flash hider, 1/2x28, black crush washer included
• USA-made slick side billet 6061 aluminum upper receiver, anti-rotation cutout, no forward assist housing
• 15-inch freefloat M-LOK handguard, full-length Picatinny top rail, integrated QD sling mounts, no anti-rotation tabs
• BCG and charging handle not included

Perfect For

• Builders sourcing a complete .223 Wylde AR-15 upper build kit with a USA-made slick side billet upper featuring an anti-rotation cutout and a 15-inch freefloat M-LOK handguard with integrated QD sling mounts, pairing it with their own bolt carrier group and charging handle
• Shooters building a 16-inch carbine-gas .223 Wylde platform who prefer to select their own BCG while having the black nitride straight profile barrel, USA-made slick side billet upper with anti-rotation cutout, and freefloat M-LOK handguard with full-length Picatinny rail and integrated QD sling mounts covered in one kit
• AR-15 builders who want a .223 Wylde upper build kit with a clean slick side billet upper, black nitride 4150 barrel, and integrated QD sling mounts on the handguard without sourcing components separately

Barrel and Muzzle Device

The 16-inch straight profile barrel is chambered in .223 Wylde and constructed from 4150 steel with a black nitride finish. The twist rate is 1:8 and the thread pitch is 1/2x28, which matches the included A2 birdcage flash hider. A black crush washer, a micro low-profile steel gas block at 0.750 journal diameter, and a carbine-length stainless steel gas tube cover the front end gas configuration on this carbine-length platform.

Slick Side Billet Upper Receiver and Handguard

The USA-made slick side billet 6061 aluminum upper receiver features an anti-rotation cutout and removes the forward assist housing from the upper receiver body for a clean exterior profile. The 15-inch freefloat M-LOK handguard features a full-length Picatinny top rail, integrated QD sling mounts, and no anti-rotation tabs, 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 platform.

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