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Colt
Overview
The Colt Carbine H2 Heavy Buffer is designed specifically for carbine-length gas systems, providing reliable cycling and improved recoil management. Its H2 weight helps to mitigate the harshness of the bolt carrier group’s movement, allowing for smoother operation during firing. This buffer is commonly found in builds utilizing the 5.56 NATO caliber, making it a suitable choice for builders looking to enhance performance in their carbine platform.
Colt Carbine H2 Heavy Buffer ranked #48 of the 88 buffers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #85 of the 177 buffers builders have added. Builds with this buffer are mostly chambered in 5.56 NATO (94%), mostly on carbine-length gas (79%, then mid-length 14%), and mostly AR-15 (75%, then AR-10 25%).
It was out of stock everywhere we track for all of August 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $40 at Primary Arms for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
We ranked every buffer by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Buffer Guide →Check it against the live catalog:
The part most often added in each category by the 43 builds that include this one
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Colt Carbine H2 Heavy Buffer
| Build | Parts | Total |
|---|---|---|
 | 17 | $1477.40 |
 | 22 | $1028.97 |
 | 14 | $1140.26 |
 | 20 | $1467.54 |
 | 14 | $1122.28 |
 | 18 | $794.05 |
 | 26 | $2744.69 |
1 global rating
Top reviews
colt H2 carbine buffer, weight feels right on a 14.5 mid length. install was a bit fiddly because the buffer detent on my tube was a touch sticky, cleaned the detent slot with a pick and it dropped in smooth. ejection moved to a tight pile after install
