Description

The Rock River Arms AR-15 Upper Receiver Assembly is designed to pin onto any mil-spec lower receiver. Just add an optic, or set of sights, and you are ready to send lead downrange!

FEATURES:

– Flattop upper receiver
– Mil-spec compatible
– Anodized finish

SPECIFICATIONS:

– Cartridge 5.56x45mm NATO
– Color Black
– Finish Anodized
– Material Aluminum
– Barrel Length 16 Inches
– Barrel Material Chrome Moly Steel
– Barrel Finish Black
– Twist 1:8 Inches
– Threads 1/2"-28
– Sights No
– Chrome Lined No
– Gas Block Diameter 0.75 Inches
– M4 Feed Ramps Yes
– Upper Receiver Type A4 Flat-Top
– Bolt Carrier Assembly Included Yes
– Muzzle Device A2 Flash Hider
– Country of Origin United States of America
– Compatible With
– AR-15

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