MDT Rubber Short Buttstock Dampeners SRS Black. Simply apply some dry lube to the outer edge and press them into the buttstock openings. No need for tools or screws the MDT Rubber Dampeners will stay snug in place. Specifications for MDT Rubber SRS Short Buttstock Dampeners: Manufacturer: MDT Gun Type: Rifle Fabric/Material: Rubber Package Contents: MDT Rubber SRS Short Buttstock Dampeners MDT 106921-BLK: Rubber Short Buttstock Dampeners SRS Black