Davidson Defense Catastrophe 16-inch Carbine-Gas 1:10 7.62x39mm AR-15 KeyMod Rifle Upper Build Kit

Catastrophe 16-Inch Carbine-Gas 1:10 7.62x39mm AR-15 KeyMod Rifle Upper Build Kit

The Catastrophe Upper Build Kit is built around a 16-inch 7.62x39mm "Sagger" HBAR barrel with a carbine-length gas system and a 12-inch Trinity Force FW P1812 KeyMod handguard. BCG and charging handle are not included.

Key Features

• 16-inch "Sagger" HBAR barrel, 7.62x39mm, Enhanced Phosphate finish
• Carbine-length gas system
• 7075-T6 aluminum upper receiver with M4 feed ramps, black anodized finish
• 12-inch Trinity Force FW P1812 KeyMod handguard with anti-rotation tabs
• AR-15 birdcage flash hider on 5/8x24 threads with 5/8-inch black crush washer
• BCG and charging handle are not included.

Barrel and Gas System

The 16-inch "Sagger" barrel is built in a heavy HBAR profile with an Enhanced Phosphate finish, chambered for 7.62x39mm. It runs a carbine-length gas system through a stainless steel gas tube and a micro low-profile steel gas block with a .750-inch diameter, matched to the barrel's .750-inch gas journal. At the muzzle, 5/8x24 threads carry the included AR-15 birdcage flash hider, secured with the supplied 5/8-inch black crush washer.

Upper Receiver and Handguard

The upper receiver is machined from 7075-T6 aluminum with M4 feed ramps and a black anodized finish, and it includes the forward assist assembly along with the ejection port door, rod, and spring. It's paired with a 12-inch Trinity Force FW P1812 KeyMod handguard featuring anti-rotation tabs.

Follow all manufacturer instructions and safe handling practices.

Ensure compliance with all applicable federal, state, and local laws.