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This upper features a 1913 top rail, M4 feed ramp
Hard-coat anodized to MIL-A-8625 type III class 2
Precision machined to mil-spec from a 7075 T6 aluminum forging.
Ejection port cover, rod, spring, and c-clip are installed along with forward assist, spring, and pin.
Forging marks may vary
No machined or painted t-marks.
Made in USA