Extremely lightweight"" suppressor compatible and infinitely adaptable because of the M-LOK or KeyMod attachment system"" the Modular Combat Suppressor Rail is perfect for tactical or competition use. Precision machined from 6061-T6 aluminum"" it features a seamless top picatinny rail and M-LOK or KeyMod slots at 3"" 6 and 9 O'clock positions for solid mounting of accessories where needed.