YHM STRIPPED BILLET UPPER AR-15YHM STRIPPED BILLET UPPER RECEIVER FOR AR 15 FEATURES Made from 7075 T6 aluminum (billet) M4 style feed ramps Inside coated with dry film lube Accepts standard upper receiver parts (dust covers, forward assists, etc.) Accepts Mil Spec lower receivers Fit & function with your standard lower receiver Hardcoat anodized matte black to Military Specifications or better
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