There is a screw in the front of the original mount that is located underneath the handguard. The handguard must be removed and then this screw must also be removed before the original mount can be removed. Removing the original mount may be a difficult task. Please use caution when removing the original mount and when installing EGW mount. EGW always recommends having their products installed by a competent and qualified gunsmith. Metric screws are only available with hex heads. EGW recommends measuring the hole spacing in your receiver to confirm it matches with the dimensions they have published. Picatinny cross slots run the full length of the rail, which gives the Mfg: Egw
