The gripping surface of this grip is the same size at the 4045 Tactical Deluxe. The top has been made flat so it will fit onto chassis system stocks that take AR-15 type grips. Although this grip will fit on an AR-15 type rifle the back of the grip does not lay flush with the back of the receiver. This grip features hand filling palm swells for both left and right handed shooters. Fits medium to large hands best.