Rugged Suppressors M249 Muzzle Device 9/18x24 LH Black. The M249 - 9/16x24LH Muzzle Device features a Dual Taper Locking System and is compatible with Rugged's Alaskan360" Surge762" Razor762 and Micro30. Specifications for Rugged Suppressors M249 Muzzle Device: Manufacturer: Rugged Suppressors Color: Black Threads per Inch: 9/16x24 LH Gun Model: M249 SAW Features of Rugged Suppressors Muzzle Device Flash Hider For M24: Designed for M249 Package Contents: Rugged Suppressors M249 Muzzle Device What firearm models does the manufacturer say Rugged Suppressors M249 Muzzle Device is compatible with? The manufacturer says that Rugged Suppressors M249 Muzzle Device is compatible with M249 SAWRugged Suppressors MD001: M249 Muzzle Device 9/18x24 LH Black