SOCOM-Approved, Free-Float, Quad-Railed Carbine Handguards
A machined aluminum multi-rail handguard specifically designed for the Special Operations Command (SOCOM) M4A1 carbine, the RIS II enables installation of an M203 40mm grenade launcher, while allowing the barrel to free float. The M203 attaches to the bottom rail quickly and easily, without special tools or additional parts. Full-length, MIL-STD 1913 Picatinny rails provide plenty of space to add other mission-specific accessories as needed. Top rail is designed to mate continuously with the receiver rail. All models come with all required mounting hardware, instructions, and three molded polymer, snap-on rail covers. RIS II requires the installation of a low-profile gas block.
You will also need the Lite Rail Barrel Nut Wrench for installation.
AR-15, Issue:09, Page:041
Big Book Catalog, Issue:67, Page:044
SPECS: 6061 T6 aluminum, hardcoat anodized, matte Black, or Flat Dark Earth (FDE). 2¼" (5.7cm) wide, 2¼" tall. RIS II – 12½" (31.75cm) long, 19.4 oz. (550g) weight.