Davidson Defense Garrison 16-inch Carbine-Gas 1:8 6.5 Grendel AR-15 Freefloat Tubular M-Lok Handguard Rifle Complete Upper Build

Garrison 16-inch Carbine-Gas 1:8 6.5 Grendel AR-15 Freefloat Tubular M-LOK Complete Upper

The Garrison is a 6.5 Grendel AR-15 Complete Upper built around a 16-inch carbine-length gas platform. The kit centers on a 16-inch M4 profile parkerized barrel with a 1:8 twist rate and 5/8x24 thread pitch, paired with a GI birdcage flash hider compatible with .308 Winchester, 7.62x39, .300 Blackout, and 6.5 Grendel, and a black crush washer. A micro low-profile steel gas block at 0.750 diameter and a carbine-length stainless steel gas tube are included on the front end. The 7075-T6 aluminum black anodized upper receiver features M4 feed ramps, an ejection port door with rod and spring, and a forward assist assembly, paired with a 15-inch freefloat tubular M-LOK handguard in aluminum with a suppressor-ready internal diameter of 1.77 inches. A complete 6.5 Grendel Type II QPQ nitride bolt carrier group and a Mil-Spec AR-15 M4 charging handle complete the upper component set.

Key Features

• 16-inch M4 profile parkerized barrel, 1:8 twist, 5/8x24 thread pitch, 6.5 Grendel
• Carbine-length gas system
• Carbine-length stainless steel gas tube
• Micro low-profile steel gas block, 0.750
• GI birdcage flash hider, 5/8x24, .308 Winchester and 7.62x39 and .300 Blackout and 6.5 Grendel compatible, black crush washer included
• 7075-T6 aluminum upper receiver, black anodized, M4 feed ramps, ejection port door with rod and spring, forward assist assembly
• 15-inch freefloat tubular M-LOK handguard, aluminum, 1.77-inch internal diameter, suppressor-ready design
• Complete 6.5 Grendel Type II QPQ nitride bolt carrier group
• Mil-Spec AR-15 M4 charging handle

Perfect For

• Builders sourcing a complete 6.5 Grendel AR-15 upper with a 7075-T6 anodized upper receiver, 6.5 Grendel Type II QPQ nitride BCG, and 15-inch suppressor-ready tubular M-LOK handguard ready to pair with their own lower receiver
• Shooters building a 16-inch carbine-gas 6.5 Grendel platform who want the BCG and charging handle covered in one complete upper with a suppressor-ready freefloat tubular handguard and GI birdcage flash hider at 5/8x24
• AR-15 builders who want a 6.5 Grendel complete upper with a suppressor-ready 1.77-inch internal diameter tubular M-LOK handguard without sourcing components separately

Barrel and Muzzle Device

The 16-inch M4 profile barrel is chambered in 6.5 Grendel and finished in parkerized with a 1:8 twist rate and 5/8x24 thread pitch, which matches the included GI birdcage flash hider. The flash hider is compatible with .308 Winchester, 7.62x39, .300 Blackout, and 6.5 Grendel. A black crush washer, a micro low-profile steel gas block at 0.750 diameter, and a carbine-length stainless steel gas tube cover the front end gas configuration on this carbine-length platform.

Upper Receiver and Handguard

The 7075-T6 aluminum upper receiver carries a black anodized finish with M4 feed ramps, an ejection port door with rod and spring, and a forward assist assembly. The 15-inch freefloat tubular M-LOK handguard is aluminum with a 1.77-inch internal diameter suppressor-ready design and M-LOK attachment points along the body for accessory mounting. The suppressor-ready internal diameter accommodates a suppressor body within the handguard on compatible suppressor configurations. These two components define the exterior structure of the upper assembly on this 6.5 Grendel platform.

Bolt Carrier Group and Charging Handle

The complete 6.5 Grendel Type II QPQ nitride bolt carrier group is compatible with the 6.5 Grendel platform. A Mil-Spec AR-15 M4 charging handle is included to complete the upper component set.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.