Sylvan Arms RAPID ATTACH MOUNTING SYSTEM R.A.M.S Competition Rifle Weights OD Green. Adding weight to a rifle can cut down recoil allow for easier spotting of shots and balances a riffle. These weight mounts on any chassis or stock that is m-Lok compatible. The Sylvan Arms Q.D. attachment system allows the shooter to add or remove weight instantly without the need for tools or screws. One set of weights adds 13.5oz to your build. Features of Sylvan Arms Competition Rifle Weights Contains 1 Set of 2 weights (6.75oz each). Quick Detach. Competition shooting compatible. Package Contents: Sylvan Arms Competition Rifle Weights Sylvan Arms RWODG: Competition Rifle Weights OD Green