• Compatible with Griffin Gate-LOK suppressors (M4SDK, M4SD2, 30SD, and 30SDK) as well as the QD Blast Shield
  • Combines the functions of muzzle Brakes, tactical compensators, and flash suppressors
  • Free of wear prone geometry
  • Flash tines help mitigate excessive flash
  • Precisely calculated porting to neutralize muzzle movement
  • Two Sacrificial baffles to extend the life of your suppressor
  • Pre-drilled 3mm hole for permanent attachment on 14.5" barrels needing 16.1"
  • Comes with muzzle shim kit and over-travel stop washer


  • Material: 17-4PH Stainless Steel
  • Finish: Melonite QPQ
  • Outer Diameter: 0.86"
  • Bore Diameter: 0.251
  • Weight: 2.65 oz.
  • Length: 2.21"
  • Thread: 1/2"-28 TPI


  • .223/5.56 barrel with 1/2"-28 thread pitch
  • Compatible with Griffin Armament QD Blast Shield
  • Compatible with Griffin Gate-LOK suppressors (M4SDK, M4SD2, 30SD, and 30SDK)


  • 1x Griffin Armament Gate-LOK 5.56 Flash Comp
  • 1x Over-Travel Stop Washer
  • 1x Shim Kit


This Griffin Armament Gate-LOK 5.56 flash compensator is compatible with Gate-LOK M4SDK, M4SD2, 30SD, and 30SDK model suppressors, as well as the QD Blast Shield. The Gate-LOK 5.56 Flash comp achieved a perfect score in National Tactical Officers Association testing and received the NTOA Gold Seal of Approval.

Enhanced Shooting Experience

The Griffin Armament Gate-LOK 5.56 Flash comp is an integration of the three separate classes of muzzle devices of brakes, flash suppressors, and compensators. These design features include sacrificial baffle design, lower flash signature, and reduced felt recoil for an unsurpassed shooter experience. The Griffin Armament Gate-LOK Flash Comp ambidextrous quick-detach mount allows attachments to quickly and easily be installed and removed with either hand.

Superior Craftsmanship

The Griffin Armament Gate-LOK Flash comp is machined from 17-4PH stainless steel and given a lustrous black nitride finish for superior strength and durability. Precisely engineered ports are designed to minimize muzzle movement, and two sacrificial baffles are configured to extend suppressor life. This M4SD Flash comp is lightweight at just 2.9 ounces and presents a narrow profile with an overall length of 2.2 inches and an outside diameter of 0.86 inches.

No Gunsmithing Required

This M4SD Flash Comp comes ready for installation on 5.56mm caliber firearms having a 1/2 x 28 thread pitch, and a shim set and over-travel stop washer are included. Note that the over-travel stop tab on the compensator should be positioned at the six- O'clock position during installation.

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