Increase your MK IV's accuracy and reliability with the Volquartsen MK IV Bedding Gels. This easy to install product eliminates any play between the frame and upper of your MK IV and ensures you get the most from your pistol. These MK IV Bedding Gels are an adhesive-backed gel custom designed for the MK IV frame. The unique properties of Technogel make it conform to any frame and upper combination and ensures perfect lockup every time you assemble your pistol. Each package contains two Bedding Gels.