Stern Defense SD AR15 Assembled Upper Receiver Black 12.5x3.5x3.5in 010-UPPER RECIEVER-KK-P. Machined from 7075-t6 aluminum and hard-coat anodized. Mil-spec dry film lube in the bore. Specifications for Stern Defense SD AR15 Assembled Upper...
Stern Defense SD AR15 Assembled Upper Receiver Black 12.5x3.5x3.5in 010-UPPER RECIEVER-KK-P. Machined from 7075-t6 aluminum and hard-coat anodized. Mil-spec dry film lube in the bore. Specifications for Stern Defense SD AR15 Assembled Upper...