The Rustfire 16-inch AR-15 .300 BLK Rifle Full Build Kit from Davidson Defense provides everything needed for a complete assembly, catering to gunsmiths seeking a durable and reliable firearm. This kit features a 16-inch barrel made from 4150 Chrome Moly Vanadium with a phosphate finish, optimized in an HBAR profile with a 1:8 twist rate and a pistol-length gas system.
The micro low-profile gas block is designed for a .750 O.D barrel, paired with a GI Birdcage flash hider. The handguard is a 15-inch Air Lite ‘Honeycomb’ M-LOK type, constructed from T6 aluminum and anodized in bronze. The stripped upper receiver is made from 7075 T6 aluminum, complemented by a mil-spec AR-15 M4 charging handle. The kit includes a complete bolt carrier group made from 8620 alloy steel with a nitride finish and a collapsible SOPMOD style stock for customizable comfort and storage options.
Product Name: Rustfire 16-inch AR-15 .300 BLK Rifle Full Build Kit
Barrel Details:
Caliber: .300 Blackout
Barrel Length: 16 inches
Barrel Material: 4150 Chrome Moly Vanadium
Barrel Finish: Phosphate
Barrel Profile: HBAR
Barrel Twist Rate: 1:8
Barrel Gas System Length: Pistol
Barrel Thread Pitch: 5/8x24
Gas Block Details:
Gas Block Name: Micro Low-Profile Gas Block for .750 O.D Barrel Steel
Gas Block Size: 0.75
Muzzle Device Details:
Muzzle Device: AR-15/AR-10 .308 5/8x24 TPI GI Birdcage Flash Hider
Muzzle Thread Pitch: 5/8x24
Handguard Details:
Handguard Name: 15-inch Air Lite Series ‘Honeycomb’ M-LOK Free Floating Handguard
Handguard Material: T6 Aluminum
Handguard Color: Anodized Bronze
Handguard Style: M-LOK
Upper Receiver Details:
Upper Receiver Name: Stripped Upper Receiver with M4 Feed ramps
Upper Receiver Material: 7075 T6 Aluminum
Upper Receiver Finish: Anodized
Charging Handle: AR-15 M4 Charging Handle Mil-Spec Quality
Bolt Carrier Group Details:
Bolt Carrier Name: AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group
Bolt Carrier Material: 8620 Alloy Steel
Bolt Carrier Finish: Nitride
Stock or Brace:
Rifle Stock: SOPMOD Style Collapsible Stock with Storage Compartments
Stock Material: Nylon Reinforced Polymer
Stock Color: Black
Stock Type: Carbine
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