TacFire MAR039 Castle Nut AR-15 Stocks and Forends Steel Black Fits .223/5.56 Rifle Carbine Buffer Tube.

TacFire’s MAR039 Castle Nut is a steel component designed for securing the buffer tube to the receiver in AR-15 style carbines chambered for .223/5.56. This part maintains stability for the stock assembly and is manufactured for reliability and long service life. Its durable construction is compatible with standard carbine buffer tube setups found on most AR-15 platforms.

• Black steel construction for durability and corrosion resistance
• Designed for AR-15 .223/5.56 carbine stock buffer tubes
• Ensures secure attachment between buffer tube and receiver

TacFire’s castle nut is a fundamental part for assembling or maintaining AR-15 carbines. It provides the necessary strength and precision for secure buffer tube installation.