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Griffin Armament M4SD Hammer Comp
$94.95 $89.95 Save $5.00
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Most Helpful Positive Review Griffin Armament M4SD Hammer Comp
Great durable finish on this muzzle device, should last a long time. Perfect length as well, same as stock A2 birdcage. Noticed a reduction in muzzle flip shooting out of my 11.5" AR-15 pistol. Would recommend!
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Solid product for the price, especially for the gate-lok feature

by James, Verified Owner from NJ, United States Written on November 23, 2025
The hammer comp works well to reduce the felt recoil, with the gate-lok compatibility being the key point of this version of the tapered. Easy to install, performs well, no issues so far.
Would recommend: Yes
Was it helpful to you? Yes | No

Hammer Comp

by Mak, Verified Owner from MA, United States Written on November 4, 2025
Changed out a King Comp with the Griffin Hammer comp in 5.56 and found increased control and tightened group. Easy install with avid action rod. I used the stop washer with one thin and one thick washer supplied with the comp and torqued to time at 35 lbs. Get what you pay for with this one,beautiful piece.
Pros:
  • Quality product & Fit
  • Great upgrade all around
  • Fit function and finish
Cons:
  • Almost don't want to get it dirty
Would recommend: Yes
Was it helpful to you? Yes | No

hammer comp

by DRz, Verified Owner from MI, United States Written on April 17, 2024
I really like this as a mount for the qd shield from griffin armament. Great fit and functions well. Everything ive ever gotten from griffin has not disappointed
Would recommend: Yes
1 of 1 found the following review helpful.
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Excellent.

by JC Smith, Verified Owner from MO, United States Written on November 27, 2020
Put this muzzle device on two of my AR15 uppers and it is compatible with the QD Blast Shield from my 300 AAC upper. Purchased the 300 muzzle device and blast shield used and liked them so much i ordered two of them for my other uppers.
Would recommend: Yes
1 of 1 found the following review helpful.
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Great upgrade

by Bennet Moore, from WV, United States Written on November 22, 2020
Besides the badass looks, this item noticeably reduces muzzle lift. I recommend this to anyone looking upgrade their AR platform. It is a quick an easy install. Get instant props from your buddies at the range.
Would recommend: Yes
1 of 1 found the following review helpful.
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Great Compensator, Highly Recommended

by Steven, Verified Owner from CA, United States Written on June 21, 2020
I wanted an A2 sized compensator to go along with a build of mine, and this device works great in terms of controlling the muzzle rise and reducing the felt recoil back into my shoulder. This isn't a full on muzzle brake either, so the flash was present albeit not overwhelming. Concussion was not over the top either and indoor shooting was not much of a hassle. I'm satisfied with the performance of this device for the cost.
Would recommend: Yes
2 of 2 found the following review helpful.
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Griffin Armament Hammer Comp

by jkdniel, Verified Owner from KS, United States Written on April 7, 2020
Item came as described and shipped fast. Looks and feels high quality. Installed to the 1/2 x 28 threads easily once the proper combination of shims were found. I haven't shot it yet but if any problems I will advise.
Would recommend: Yes
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awesome comp

by Brett Car, Verified Owner from NJ, United States Written on March 23, 2020
great comp for the price and looks really cool on the ar-15. I used it on a .223 wyld barrel and it really sets off the look of the muzzle. its a little short so needs to be on a barrel over 16 inches. works great/ looks great
Pros:
  • Works great
  • Looks cool
Cons:
  • short for 14.5 barrel
Would recommend: Yes
0 of 1 found the following review helpful.
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One the best muzzle devices on the market

by Max, from FL, United States Written on April 10, 2019
This is one of the best muzzle devices I have had on my rifle. It keeps the muzzle in an almost neutral position. Although it is a bit concussive when shooting as long as you're shooting outside or not next to someone in an indoor range you should be fine. One of the aspects I love is how easy it is to install one of Griffin armaments suppressors.
Would recommend: Yes
Was it helpful to you? Yes | No
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