These receivers are M4A4 mil-contract upper receivers. The finest upper receivers on the market, period.
Features:
Machined from 7075 aluminum forgings,
M4 feed ramps,
Marked ‘M4’ above gas tube inlet hole,
Hard black-anodized finish.
NON T-Marked. 100% USA Made
WARNING: THIS PRODUCT CAN EXPOSE YOU TO CHEMICALS INCLUDING LEAD, WHICH IS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER AND REPRODUCTIVE HARM. FOR MORE INFORMATION GO TO WWW.P65WARNINGS.CA.GOV
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