GUNTECH USA AR15 ALUMINUM .750 GAS BLOCK HEIGHT RAILED GAS BLOCK CLAMP ON STYLE. RAIL ON TOP IS LOWER THAN YOUR UPPER BY A TOUCH. SO IF YOUR PUTTING IRON SIGHT ON MAKE SURE TO GET THE FRONT SIGHT A LITTLE TALLER. COMES WITH ALLEN WRENCH AND POLL PIN. WILL WORK WITH BOTH AR15 AND AR308 PLATFORMS.
 
 
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