The Tiger Rock Inc. ST007-D 223/5.56 Rifle M4 Six Position Buffer Tube Kit is engineered for optimal performance and exceptional durability. Made from lightweight 6061 T6 aluminum, this commercial specification kit is a perfect combination of affordability and functionality. This versatile kit includes an end plate, castle nut, aluminum carbine buffer tube, buffer, and a steel spring, ensuring reliable operation for your rifle. With its sleek black finish, it enhances both the aesthetics and performance of your firearm. Commercial Lightweight Construction Includes Buffer Castle Nut and End Plate Durable Aluminum Carbine Buffer Tube Steel Spring for Enhanced Reliability Ambidextrous Sling Plate for Versatility Transform your rifle setup with this essential buffer tube kit-ideal for any shooting enthusiast.