The Midwest Industries Gen-2 M-LOK Top Rail is specifically engineered for HK MP5 firearms featuring the versatile M-LOK mounting system in a sleek black finish.Midwest Industries Gen-2 M-LOK Top Rail for HK MP5M-LOK compatible mounting system for versatile accessory attachmentDesigned specifically for HK MP5 platformDurable black finish constructionSecond generation design for improved performanceEssential for MP5 owners looking to add optics lights or other tactical accessories with the reliable M-LOK attachment system.