Luth-AR Tacfire Carbine Lock Ring Castle Nut - Black TacFire Official AR15 Castle Locking Nut for .223/5.56 Rifle carbine stock used to tighten buffer tube to receiver. Finish: Maganese Phoshate Application: AR10, AR15, M-16, Carbine MSRP: $5.99 Was: Now: $4.99 Add to Cart
Luth-AR Luth-AR Carbine Lock Ring (Castle Nut) - CS-02 Threaded Steel ring used to retain the carbine buffer tube to the lower receiver Finish: Maganese Phoshate Application: AR10, AR15, M-16, Carbine MSRP: $5.99 Was: Now: $4.99 Add to Cart
