The ALG AK Trigger Ultimate with Lightning Bow is a single stage trigger designed for use with the AK47 and AK74 variant platforms. It was designed to be used with most AK variants without fitting. With AK variants that have a rivet for the rear of the trigger guard that commonly acts as an anti-slap feature, this rivet should be no greater than 0.062 inches tall. ALG AK triggers are designed to work with rivets that are 0.062 inches in height or less. If this rivet is higher than 0.062 inches then the rivet will have to be shaved down to allow for more clearance. Improper clearance can in damage to the disconnector itself. Note: It is recommended to have a qualified gunsmith install and perform all fitting of fire control groups.