-Comes LH and RH shells and 4 self threading screws
-Screws are T10 Torx size
-No need to stretch the apring
-Do not exceed 12 in/lbs screw torque
CAUTION: These magazine extensions will allow you to get +7, we do not recommend this as this is putting the spring in a completely compressed state and will compromise the spring tension when you have only single round left in the magazine.
