Our forged upper receivers are a great complement to our forged lower receivers with a MIL-Spec bore.
The thermal fit inner dimension measures at .997 -0.0/+0.001" and requires the application of heat in order to provide a solid mate to the recommended barrel extension. By heat we mean more than Granny's hair dryer.
Features and Specifications:
- Forged 7075-T6
- Black Type III Hard Coat Anodized Finish
- For Use with M4 Barrel extensions
- Made in America on American-made machines
- Finish:
- Anodized
- Color:
- Black
