Davidson Defense Detention 16.5-inch Mid-Gas 1:7 .223 Wylde AR-15 Freefloat M-Lok Rifle Upper Build Kit

Detention 16.5-inch Mid-Gas 1:7 .223 Wylde AR-15 Freefloat M-LOK Extended Quad Rail Rifle Upper Build Kit

The Detention is a .223 Wylde AR-15 Upper Build Kit built around a 16.5-inch mid-length gas platform. The kit centers on a 16.5-inch 4150 steel barrel with a nitride finish, 1:7 twist rate, and 1/2x28 thread pitch, paired with an A2 GI birdcage flash hider and a black 1/2-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 7075-T6 aluminum anodized upper receiver features M4 feed ramps, a forward assist, and an ejection port door assembly, paired with a 15-inch freefloat M-LOK extended quad rail handguard in black with a clamp-on G-style design. BCG and charging handle are not included.

Key Features

• 16.5-inch 4150 steel barrel, nitride finish, 1:7 twist, 1/2x28 thread pitch, .223 Wylde
• Mid-length gas system
• Mid-length stainless steel gas tube
• Micro low-profile steel gas block, 0.750
• A2 GI birdcage flash hider, 1/2x28, black 1/2-inch crush washer included
• 7075-T6 aluminum upper receiver, anodized, M4 feed ramps, forward assist, ejection port door assembly
• 15-inch freefloat M-LOK extended quad rail handguard, black, clamp-on G-style design
• BCG and charging handle not included

Perfect For

• Builders sourcing a .223 Wylde AR-15 upper build kit with a 16.5-inch nitride 4150 steel barrel, 7075-T6 anodized upper receiver with forward assist, and 15-inch freefloat M-LOK extended quad rail handguard in a clamp-on G-style design, pairing it with their own bolt carrier group and charging handle
• Shooters building a 16.5-inch mid-gas .223 Wylde rifle platform who prefer to select their own BCG while having the nitride 4150 steel barrel, anodized upper receiver with M4 feed ramps and forward assist, and freefloat M-LOK extended quad rail handguard covered in one kit
• AR-15 builders who want a .223 Wylde upper build kit with a 15-inch freefloat M-LOK extended quad rail handguard in a clamp-on G-style design without sourcing components separately

Barrel and Muzzle Device

The 16.5-inch 4150 steel barrel is chambered in .223 Wylde with a nitride finish, 1:7 twist rate, and 1/2x28 thread pitch, which matches the included A2 GI birdcage flash hider. A black 1/2-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 7075-T6 aluminum upper receiver carries an anodized finish with M4 feed ramps, a forward assist, and an ejection port door assembly. The 15-inch freefloat M-LOK extended quad rail handguard is black with a clamp-on G-style design and 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.