The Sabal Arms M4 flat top upper receiver is machined from a Mil-Spec 7075 T6 forging, then coated with a Type 3 Hardcoat Anodized finish. Also includes M4 feed ramps that are cut into the receiver before the anodizing takes place to avoid future feeding issues.
Features / Specifications
- Mil-Spec 7075 T6 aluminum
- Type 3 Hardcoat Anodized Finish
- CNC T-Markings
- M4 Feed Ramps
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