AR-15 H3 Heavy Buffer – 5.4 oz Carbine Buffer (V2 Reciprocating Design) weight may vary 5.2-5.4oz
Product Description
Upgrade the performance of your rifle with this H3 Heavy Buffer for AR-15 carbine systems, designed to deliver smoother cycling, reduced felt recoil, and improved reliability. Built with a V2 reciprocating internal weight design, this buffer helps slow down bolt velocity, resulting in more controlled operation and a noticeably smoother shooting experience.
BUILD IT IN A COMBO & SAVE $50
Get this with a matched buffer and M16-cut BCG — everything spec'd to run together, shipped in one order.
Build Your Combo →Ideal for shooters running carbine-length gas systems, suppressed rifles, or higher-pressure ammunition, the H3 buffer helps balance the action and reduce excess wear on internal components.
Whether you’re building a new rifle or upgrading an existing setup, this drop-in AR-15 heavy buffer provides a simple yet highly effective performance improvement.
Key Features
• H3 Heavy Buffer Weight: 5.4 oz
• V2 Reciprocating Internal Weight System for smoother operation, with multi weights
• Reduces Felt Recoil and Bolt Speed
• Improves Cycling Reliability
• Carbine Length Buffer Design
• Durable Black Finish
• Drop-In Installation – No Gunsmithing Required
steel body weight,
This carbine length H3 heavy collapsible stock buffer assembly provides smoother function and helps to noticeably reduce felt recoil.
Features:
Approx. 5.2 oz.- 5.4 oz
Length: 3.25"
Black finish
Drop-in installation
Steel Body
2 Reciprocating Weights
Fits: AR-15 .223/5.56 .300blk 7.62x39
Specifications
Why Choose an H3 Buffer?
An H3 heavy buffer is one of the most effective upgrades for AR-15 platforms. By adding additional mass to the buffer system, it:
✔ Helps slow down bolt carrier speed
✔ Reduces recoil impulse
✔ Improves reliability with hotter ammunition
✔ Enhances overall shooting smoothness
This makes it especially beneficial for shorter barrel rifles, suppressed setups, and high-performance builds.
Overall rating: 4.1 / 5 from 105 reviews.
I have not installed this buffer yet, but I think it will work great. it is a quality build with a solid rattle and deadbolt effect. 5.4oz on my scale.
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Store owner replied: Glad to hear it!!
Slid right in, easy.
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Could not get my frt to function properly until I installed this buffer 10/10
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
The buffer was easy to install and fixed issues I was having with tuning my partisan disruptor
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Runs Great woth the H3👍
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Installed an FRT and replaced the buffer during the job. Runs very smooth.
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Awesome for frt
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Costumer service was very helpful with telling me what I needed to order for my new build with a frt setup 👌
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Fit and finish seem perfectly fine. However, I am unsure of what the purpose of this buffer actually is It is advertised as an h3 buffer with shake weights reciprocating mass which is true however it is not enough reciprocating mass to be equivalent to an h3 or H2 buffer which is unfortunately what I need to operate my system therefore as stated previously, I'm just unsure what the application of this buffer would actually be. I sent an email immediately after placing the order to either cancel the order or swap this buffer for an actual h3 and charge me the difference however that email has went unanswered. Hopefully they will approve this return and we both can move on with our lives.. Not holding my breath
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
This is NOT a buffer with three tungsten weights as listed in the description. This is a solid steel buffer (magnetic, weighs 4oz empty) with two smaller than normal steel weights that slide in a narrower, shorter chamber. This buffer does not work with ANY of the three main styles of FRTs. You haven’t responded to my two emails.
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
It didn't fix my problem with the Partsan trigger and still no response from Partsan and still no help from Tackdown either!!
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Was unable to achieve the necessary BCG slowing to utilize my forced reset trigger. Need a smoother shake weight.
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Item arrived beat up. I will update review after field tests.
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Needed a heaver buffer to slow things down a bit ... they worked perfectly.... very happy 😊
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Works great with my Atrius FRT. Slowed the gun down to a manageable level. Great Product.
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
perfect weight and does exactly what it was meant to do reliable cycling and recoil management
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Buffer weighs properly, is functional, would prefer to have "H3" indicated (stamped in to) on the buffer to tell at-a-glance what buffer it is. I'm not in the habit of toting gram/oz scale around with me.
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Perferct buffer weight for using a SBR, or carbine style AR pistol in .300 blackout while utilizing a FTR set up. Clean feeding, no hangups.
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
With this heavier buffer, I was still not able to run my frt without the firearm jamming, any suggestions would be greatly appreciated
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Had a problem with my buffer and you guys jumped right on it and took care of me. I’m so very happy with your customer service. Thank you and appreciate you guys. I won’t be doing business with anyone else for my firearm needs. Thanks for being a great company.
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Very great product
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Works great recommend definitely
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Thumbs up!
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Y’all need someone better than usps
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Still working out other problems……the buffer works well.
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Thanks for the awesome buffer!
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Work great in my 10.5 300 blk out with the super safety
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
The weights barley move in the buffer and has a light primer on it has to get a better quality h3 for it to work on my set up
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Love it it works flawlessly if you don’t have one get one
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Its what I need
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Customer service stepped in and up. I will be a repeat customer. Thank you!
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
They were great to work with usps lost my buffer and they refunded me fully once they realized what had happened would definitely order again
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
I have a Windham AR15 I bought the FRT trigger from you and an H2.5 buffer the frt would fire 1 round and give a light primer strike on second round and it didn’t go off this happened over and over in frt mode semi it worked fine so I purchased H3 buffer from you 5.4 oz same thing light striker on second round I wish I could return then and get something that works
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Perfect fit and finish, seems well made and works great with the FRT trigger .
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Fit like it’s supposed to
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Great business to deal with. Only one complaint is i I wish there was an option other than USPS.
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
My ambi selector was nylon polymer and one side folded back and cracked before I even got the skrew in....everything else great but dunno what to do about my selector now...also now my safety is in the fire position, semi is in the safety position, and frt is pointing straight down....dunno where to get another ambi selector with the correct cuts
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
👍
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Hassle, free and fast delivery
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
Install was simple as a buffer should be works wonders with the partisan trigger
AR-15 H3 Heavy Buffer 5.4oz Shake weights (V2 Reciprocating)
