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Griffin Armament Griffin Stock Mounting Kit
$89.95 $85.00 Save $4.95
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Most Helpful Positive Review Griffin Armament AR15 Stock Mounting Kit
I first used a Griffin Armament SOB and mounting kit on an 18in scoped AR for 3 years and it really helped tune my rifle and reduce felt recoil significantly when used in conjunction with an adjustable gas block. Long target shots and hunting are what this extension assembly are made for. The holes ...
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Most Helpful Negative Review Cracked end plate
I torqued the castle nut to 28 ft lbs, using an anti-seize, then attempted to stake the castle nut when the end cap cracked, splitting it.
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Great Kit From a Great Company

by Don, Verified Owner from PA, United States Written on May 28, 2025
Folks, let me tell you — this Griffin Armament Stock Mounting Kit? TOTAL WINNER. One of the BEST investments you can make for your firearm — and I know INVESTMENTS. Tremendous quality. Made right here in the USA too, I assume — because that’s the kind of company Griffin Armament is. They build them tough, they build them smart, and they build them like we do: BIG and BEAUTIFUL.

This kit is EASY TO INSTALL — believe me, if I can do it, YOU can do it. Upgrades your rifle like you wouldn't believe. More stability, better ergonomics, and looks? SHARP. Looks like something ONLY a TRUE PROFESSIONAL would use. The best part? It's BUILT TO LAST. No cheap parts, no flimsy materials — just SOLID AMERICAN ENGINEERING.

So if you want to take your rifle from GOOD to GREAT — and who doesn’t? — then DO YOURSELF A FAVOR and get this Griffin Stock Mounting Kit. You'll wonder how you ever shot without it. FIVE STAR PRODUCT. Total winner. Believe me.
Pros:
  • Air flow
  • built like a rock
Cons:
  • None
Best Used for:
  • ar 15
Would recommend: Yes
Was it helpful to you? Yes | No

All In 1 Little Box

by Chris, Verified Owner from NV, United States Written on December 8, 2024
This is the Go To stock completion kit for all of my builds, regular AR’s, suppressed, SBR’s etc. that little extra weight in the buffer makes for a flatter smoother shot. Even if you don’t need the entire kit, the SOB buffer is worth a look. It’s quality stuff as usual from Griffin Armament.
Pros:
  • All you need is to add your favorite stock
  • Not all shiny and pretty. This kit was made to take a beating.
  • Every Mil-Spec stick I have tried has been spot on. Nice and tight.
Cons:
  • I have yet to find anything wrong with the 15+ kits I have used.
Best Used for:
  • What it was designed for.
Would recommend: Yes
Was it helpful to you? Yes | No

Buffer replacement

by Duke, Verified Owner from SC, United States Written on July 9, 2024
Optic planet always come threw with the great product.
Would recommend: Yes
Was it helpful to you? Yes | No

Solid lower extension and recoil kit

by CH, Verified Owner from VA, United States Written on May 14, 2024
I purchased because I wanted to try the SOB weight on a GA MK-2 lower receiver, for a 10.3" 5.56 upper. I wanted to see how it compared to the kynshot. I also needed an endplate and receiver extension, so this kit made sense. There is nothing special about the tube, spring, nut or plate. It would be nice if they had an offering for a blue spring, but they don't so, whatever.
Would recommend: Yes
Was it helpful to you? Yes | No

Good and bad.

by BFPD, Verified Owner from WI, United States Written on November 7, 2023
Great buffer system all around, however mounting hardwear for the end plate looks to be hardened and I have flattened 3 punches trying to stake this.
Pros:
  • Great weight and operation
Cons:
  • Endplate
Would recommend: No
Was it helpful to you? Yes | No

Works good all around

by Ryan, Verified Owner from WA, United States Written on June 25, 2023
Handles MANY calibers and gasses without adjustment. Flawless on my .300blk. I like Griffin Armament, and they do not let down. There was only one thing to mention, it was noisey (springy sound), and I just greased up the spring with white lithium and that helps.
Would recommend: Yes
1 of 2 found the following review helpful.
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A great combo

by Lefticus, from OH, United States Written on May 13, 2022
All of the extra features with a bundle price. Typical Griffin flawless fit and finish. Fitment to POF lower is great. SOB gives more dwell with less weight, yet plenty enough weight to cycle properly.
Would recommend: Yes
Was it helpful to you? Yes | No

Griffin Armament: for the win!

by Jonathan, from TX, United States Written on July 7, 2020
Great kit to optimize my suppressed 300 BLK. Love the AR-SOB, for shooting unsurpassed. Maritime receiver gives additional piece of mind. Using with a Recce 7; this kit is a must have! Looking at the bolt next and even another GA suppressor! Griffin Armament for all your suppression needs!
Pros:
  • Smoother cycling
  • Cycling without supressor
  • Maritime receiver
Cons:
  • None
Best Used for:
  • Supressed rifles
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Awesome. Highly recommend.

by Dustin Miller, Verified Owner from TX, United States Written on June 27, 2020
Used this on my latest 300blk build and works phenomenal!!! I have used several other buffer systems and this system operates flawlessly. Definitely one of the better buffer weight and spring set ups. Also pulled this out and ran it on a suppressed 5.56 and also ran flawlessly. As with multiple other griffin armament items I run on my guns, this is one of the better choices that I made. So as usual, I’m not disappointed. Great product, nice job fellas.
Would recommend: Yes
1 of 1 found the following review helpful.
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Great set up

by Nick, Verified Owner from MS, United States Written on June 13, 2020
Got it in today. Installed on my DD MK18. It feels great. Seems like it does slow the bolt down when fired without the suppressor, but runs great with the can on the gun. Would definitely recommend. Will probably buy another one for my 300blk.
Pros:
  • Great product from a great company
Cons:
  • None
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No
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