Gate-LOK™ FlashComp .30cal (7.62mm) 5/8x24

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The Griffin Armament Gate-LOK™ muzzle devices interface with Gate-LOK™ suppressors (M4SDKM4SD2, 30SD, and 30SDK) as well as the QD Blast Shield.

The Gate-LOK™ Flash Comp 7.62mm provides high performance mounting options for Griffin Gate-LOK™ Silencers as well as a 30 caliber (7.62mm) interface for the QD Blast Shield. The Flash Comp was made with the same performance features as its 5.56mm counterpart but with a 5/8x24 threaded interface and integral overtravel stop. Pre drilled hole to aid in pinning and welding. The Gate-LOK™ Flash Comp .30cal (7.62mm) is included with the 30SDK silencer. CNC Machined and outside diameter ground from high strength, corrosion and wear resistant, 17-4 precipitation hardened stainless steel, the Gate-LOK™ Flash Comp .30 cal (7.62mm) is black oxide finished. 5/8x24 threads offer compatibility with most 7.62mm firearms on the market.

Diameter: .863"
OAL: 2.770"Added (2.15")
Weight: 3.2 ounces
Materials: 17-4PH Stainless Steel
Finish: Black Nitride
Attachment: 5/8x24 Thread


  • Ambidextrous QD Mount
  • Free of wear prone geometry
  • Functionally engineered for maximum performance
  • Sacrificial baffle to extend the life of your suppressor (excludes Flash Supp.)
  • 17-4 PH Stainless steel to withstand hard use
  • Griffin Laser Logo Marked
  • 5/8x24 industry standard Thread Pitch for most 7.62mm firearms
  • Shim set Included
  • Integral Over-Travel stop
  • Compatible with 30SD, M4SD series silencers, and QD Blast Shield
7.62mm (.30)
Thread Pitch:
Attachment System:
Type Of Part:
Muzzle Device

13 Reviews

  • 5
    High Quality

    Published by Neal Farmer on 11th May 2024

    Quality product. Looks great, functions great. These guys are also truly military friendly. I will definitely purchase from these guys again.

  • 5

    Published by Robyn H. on 5th Feb 2024

    Works great as both as a flash hider and comp, looks great with a 30sdk gatelock attached to it as well

  • 5
    Works well on Magnum.

    Published by David Bonomo on 7th Nov 2023

    Flashcomp is very effective on 7mm Rem Mag bolt gun . Recoil is reduced to an easy rearward push, with little to no muzzle clime. Noise and blast are less than other breaks I’ve shot.

  • 5
    Great product!

    Published by Steve Mosier on 9th Dec 2021

    Easy install, great quality!

  • 5
    30SD Flash Comp

    Published by Forest on 18th Nov 2020

    Fast shipping, excellently machined, and beautifully finished. Works well.

  • 5
    30SD Flash Comp

    Published by David Dutton on 12th Oct 2020

    Really appreciated the quick shipping. Installed the Flash Comp on my unfired PSA 10.5" 300 Blackout. Shot approx. 18 rounds through it to Zero the sights and red dot. The Flash Comp preformed flawlessly. It also accepted my recently purchased Gate-Lock Blast Shield. Could not be ,ore pleased.

  • 5
    30 SD mount

    Published by Steven Pinson on 25th Jul 2020

    None better out there, especially for the SD 30 suppressor.

  • 5
    30SD Muzzle Brake

    Published by Mark on 2nd Dec 2019

    Fine Craftsmanship/ includes shims Great product

  • 5
    flash comp

    Published by lee maxey on 5th Feb 2019

    Excellent I have one for my 5.56 and I'm planning to purchase a suppressor from you.

  • 5

    Published by Mike on 20th Nov 2018

    This is hands down my favorite muzzle device! Griffin has excellent muzzle devices. They have a super tough nitrde finish on them that holds up extremely well to heavy wire wheel cleaning after running a silencer on them. I wish they made a 30 cal hammer comp.