MDT Rubber Buttstock Dampeners SRS-X/SRS-X Premier 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-X/SRS-X Buttstock Dampeners: Manufacturer: MDT Gun Type: Rifle Fabric/Material: Rubber Package Contents: MDT Rubber SRS-X/SRS-X Buttstock Dampeners MDT 105734-BLK: Rubber Buttstock Dampeners SRS-X/SRS-X Premier Black