No drilling, tapping or major alteration. Guaranteed to hold zero. Can be removed and reinstalled easily. Made in the USA of top grade military allan aircraft aluminum. Rings not included - accepts Weaver rings.

Instructions for the installation of the M-1 Carbine

We would like to congratulate you for your choice of an S&K insta mount and assure you that we guarantee a properly installed insta mount to be as strong and in most cases stronger than any other mount. To properly install your mount simply do the following:

Drive the rear sight out of it’s dovetail in the carbine receiver ( Drive  left to right ), and replace the sight with the dovetail nut included with the insta mount. Put the base in proper location on top of the receiver with mount projection forward. Put cap screw in place and tighten as tight as possible. (DO NOT USE AN EXTENSION ON KEY )