The TacFire MAR040 Mil-Spec Buffer Tube is a receiver extension designed for AR-15 platforms. It is manufactured from 6061-T6 aircraft-grade aluminum and finished with a Type III Class II hard coat anodize for enhanced wear resistance. The tube is made to meet Mil-Spec dimensions and is compatible with Mil-Spec butt stocks.
Key Specifications
- Manufacturer is TacFire.
- Model is MAR040.
- Material is 6061-T6 aircraft-grade aluminum.
- Finish is matte black Type III Class II hard coat anodizing.
- Compatibility is Mil-Spec AR-15 butt stock.
- Fitment is engineered for zero-gap fitment with polymer stock and receiver.
- Application is as a receiver extension for AR-15 platforms.
Built for durability and consistent fit, this buffer tube provides a clean, Mil-Spec interface for builders and armorers who value precise tolerances and long-term wear resistance. Its straightforward design and rugged finish make it a practical choice for assembling or repairing AR-15 platforms where Mil-Spec compatibility is required.
This description was generated with AI and may contain errors. Verify specifications and legal restrictions with the manufacturer before purchase. Provided “as-is” without warranties or guarantees.




