RAP4 Walk-In Super Store
The Foregrip Integrated Rail System (F.I.R) is designed to fit mil-spec flat top receivers and allows multiple attachments tailored to the needs of the user's specific mission. Installation of the selective rails is easily accomplished with a coin, and are easily installed onto the RAP4 markers. The F.I.R. unit has an upper component made out of cast aluminum, and lower component made out of durable plastic.