RS Regulate: The GKR-7MS is a 7a ^2 drop-in fit MLOK rail for most 1.0mm stamped \"AKM style\" Kalashnikov rifles with short-style sling loops (not full length or tall loops like East German or Yugo). It mounts similarly to the factory handguards; you will need a factory-style front handguard retainer. You can add your KVAR style stainless heat shields for added protection, and you can use your factory cleaning rod. This is a very technical upgrade to your AKM pattern rifle and requires a custom fit to your rifle. For that reason, We do not allow returns on this item if the seal on the box has been opened. We highly recommend a qualified gunsmith install this item. IS NOT COMPATIBLE with other types or makes of rifles at this time. Does NOT fit PSA rifles due to their unique cast front handguard retainer. Please click the \"SHOW MORE +\" button for more info on compatible rifle models.