The KLS-IL is a lite version of the KLS-3 stock for the FX Impact and Maverick. 
This is compatible with all versions of the Impact and Maverick.

KLS-IL comes in two configurations: Bench and PRS
Bench features our K&L adjustable butt pad. This features adjustable shoulder flaps and cant adjustment. This pad is best suited for those who want to dial in and maximize shooting comfortability.
PRS features a Magpul pad. This is best for all around shoulder positions without having to make too many adjustments.