>The Seekins Precision Modular Combat Suppressor Rail (MCSR) V2 MLOK is a free float hand guard system designed to be compatible with the use of a suppressor. The MCSR is machined from 6061-T6 aluminum with cooling slots to helps dissipate heat from both the suppressor and barrel, as well as make the hand guard extremely lightweight. The rail features MLOK slots at 3, 6 and 9 O'clock positions allow mounting of accessory rails where needed. The integral top Picatinny rail is seamless with the rail on Mil-Spec upper receivers. The rail also has six QD sling attachments machined into the front and back of the hand guard at 3, 6 and 9 O'clock positions. The included aluminum barrel nut and mounting hardware has anti-rotation tabs and is Type III Hardcoat Anodized matte black.
Internal Diameter: 1.8"