Gate-LOK™ Hammer Comp 5.56mm 1/2x28

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The Griffin Armament GATE-LOK™ muzzle devices interface with Gate-LOK™ suppressors (M4SDK, M4SD2, 30SD, and 30SDK) as well as the QD Blast Shield.

The GATE-LOK Hammer Comp provides a sacrificial baffle that reduces recoil and ensures maximum service life of your suppressor. Slanted compensating features provide tuned muzzle stability. CNC machined from a solid bar of heat treated 17-4ph stainless steel, the Gate-LOK Hammer Comp is built to last.

Includes shim set and features an integral over-travel stop to maximize ease of attachment with GATE-LOK™ suppressors. 

This muzzle device should be timed with the Griffin logo in the 6 o'clock position to ensure proper functionality and compensation.

Diameter:  0.863"
OAL:  1.75"
Weight:  2.4 ounces
Materials:  17-4PH Stainless Steel
Finish:  Nitride QPQ
Attachment:  1/2x28 Thread
  • Ambidextrous QD Mount
  • Free of wear prone geometry
  • Tuned slots compensate for muzzle rise
  • Sacrificial baffle to extend the life of your suppressor
  • 17-4 PH Stainless steel to withstand hard use
  • Lustrous Black Nitride QPQ finish
  • Griffin Laser Logo Marked with mini hammer for Hard users!
  • 1/2x28 industry standard Thread Pitch for 5.56mm carbines
  • Shim set Included
  • Integral over-travel stop
  • Compatible with M4SD series silencers
5.56mm (.223)
Thread Pitch:
Attachment System:
Type Of Part:
Muzzle Device

10 Reviews

  • 5
    hammer Comp

    Published by ChadK on 18th May 2024

    Love it!

  • 5
    Hammer comp

    Published by SHAWN on 12th Jul 2023

    Excellent product. My second one.

  • 5

    Published by JIM FRIEDLUND on 30th May 2022

    I ordered this mount at the same time I called in a problem with my M4SD II. It has been almost 2 weeks and my system is still out of service to me!

  • 5

    Published by Terrence Krogh on 12th Oct 2021


  • 5
    Great Mount for 30SD-K

    Published by David on 14th Jun 2021

    Allows for easy mounting of a 30SD-K while adding minimal length. Works well with the can off as well.

  • 5
    M4SD Hammer Comp

    Published by David Dutton on 12th Oct 2020

    I purchased two of the M4SD Hammer Comps to put on my 10.5" 223/5.56, and my 20" 223/5.56. Both weapons functioned flawlessly with this devices installed. Between the two weapons I fired 24 rounds checking zero and functionality. The Hammer Comps preformed perfectly on both. I am very pleased with this purchase. Thanks again for the quick shipping.

  • 5
    Hammer Comp

    Published by Jared on 22nd Apr 2019

    My favorite muzzle device. I have the hammer comp on two 11.5 inch carbines, and a 10.3 inch PDW. My M4SDII suppressor mates perfectly with the hammer comp, and the sacrificial baffles that it provides gives me extra piece of mind.

  • 5
    M4SD Hammer Comp 1/2x28

    Published by Bear State Tactical Ronald Hernandez on 4th Apr 2019

    One of the best CA compliant muzzle devices on the market. Not only does it mitigate muzzle rise, it also does that other thing CA looks down upon. Very effective, priced extremely well, same dimensions as an A2 birdcage and is a suppressor mount! You can't go wrong with anything from Griffin Armament, but with confidence.

  • 5
    Best Muzzle Device on the Market Hands down!!!!

    Published by James on 5th Sep 2018

    Keeps the muzzle completely neutral during fire, lessens the perceived recoil, isn't overly concussive, offers sacrificial baffles, rock solid suppressor host, looks awesome, super durable finish, made locally by a veteran owned company, and does a pretty good job with flash reduction. Keep up the great work Griffin!!!

  • 5
    Title of review 93

    Published by Bryan Pryce on 9th Aug 2018