Sigma Precision Stripped Mil-Spec Upper Receiver M4 Feedramps - 7075 T6 Aluminum
Sigma Precision's flattop upper receiver is carefully machined to mil-spec to serve as a great foundation for a quality AR rifle.
- Made from 7075 - T6 aluminum forging
- Type III hard coat anodized
- Matte black finish
- Can be used for all Calibers on the AR15 Platform.
- M4 Feed Ramps
- Made in the USA