All metal construction and offers an alternative styled scope mount to H&K's quick release mount. Fits G3 A3/A4/SG1, MP5 entire lineup. This scope mount offers higher rigidity and is a cure for those who put their AEG's through lots of abuse. Those who do will know that under severe handling, the quick release type H&K MP5 scope mount may quick release by itself. This more rigid mount is the cure.
If your scope does not come with scope rings, or if it does not have a built in clamp to mount directly onto this scope mount rail, then you will need to purchase scope rings separately.