CMMG Upper Receivers have the following standard features. 7075 T6 aircraft grade Forged aluminum receivers T marked for return to zero capable scope mounts Hardcoat anodized per Mil-A-8625 with black Teflon coating for added abrasion resistance
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Ordered the 9mm striped upper to complete my carbine build. Turn around was less than a week and it accepted my wilson combat barrel like a glove fits a hand... Excellent product and excellent service ...thanks 9mmar!