Secure Checkout | TacFire SS-RK556 Lower Parts Kit Unassembled Rifle Kit

Specifications

Material—-Nitride-treated steel barrel; aluminum upper/handguard/buffer tube; steel components for standard AR-15 fire-control and latch parts

WARNING: This product can expose you to chemicals including arsenic, which is known to the State ofCalifornia to cause cancer. For more information, go toWWW.P65WARNINGS.CA.GOV

Product Overview

TacFire’s SS-RK556 unassembled rifle build kit is designed for the AR-platform using a .223 Rem / 5.56x45mm NATO configuration. It includes a 16-inch nitride-treated M4-contour 5.56 NATO barrel, a 15-inch MLOK free-float handguard, and the required AR-15 lower components to complete a mil-spec lower build, along with compatible upper components for a 1:8 twist setup.

Key Features

• 1/2-28 tpi muzzle threads with included birdcage flash hider and crush washer
• 16-inch 5.56 NATO M4-contour nitride barrel for AR-platform builds
• AR-15 mil-spec compatible lower parts kit components for standard builds
• 15-inch MLOK free-float handguard for modern accessory mounting
• 1:8 twist for .223 Rem and 5.56x45mm NATO applications
• Aluminum components for key parts such as the buffer tube and charging handle body

Build your AR-platform rifle with this SS-RK556 kit made for mil-spec lower compatibility and .223 Rem / 5.56x45mm NATO performance.