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Expo Arms
Overview
The Expo Arms AR-15 Carbine Buffer is designed specifically for AR-15 platforms, featuring a carbine weight that ensures reliable cycling and optimal performance in your build. This buffer is essential for managing the recoil impulse in carbine-length gas systems, particularly with 5.56 NATO calibers, allowing for smoother operation and improved accuracy. You’ll commonly find this buffer in builds that prioritize reliability and function in standard carbine configurations.
Expo Arms AR-15 Carbine Buffer With Red Bumper ranked #33 of the 88 buffers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since January 2026. All time, it ranks #25 of the 171 buffers builders have added. Builds with this buffer are mostly chambered in 5.56 NATO (63%, then .223 Wylde 13%), split between carbine-length (50%) and mid-length (50%) gas systems, and mostly AR-15 (74%, then AR-10 26%).
It was hard to find in August 2026, in stock on only 1 of the 12 days we checked, and today the one retailer we track is out of stock. Prices barely moved in August 2026, holding around $9.95, so there haven't been real sales lately. Listed prices start at $9.95 at Primary Arms for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 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 91 builds that include this one
Rise Armament AR-15 Magazine Release Button - Rise Red
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Rise Armament Advanced Performance Trigger, Red - RA-535-RED-ARP
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Timber Creek Outdoors AR-15 Takedown Pin Set - Red
Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Expo Arms Ar-15 Carbine Buffer With Red Bumper
| Build | Parts | Total |
|---|---|---|
 | 30 | $3715.46 |
 | 22 | $961.79 |
 | 25 | $901.39 |
 | 30 | $3715.46 |
 | 28 | $3402.57 |
 | 21 | $597.83 |
1 global rating
Top reviews
swapped in for a stock carbine buffer on a 16 inch carbine gas build, recoil impulse smoothed out and brass ejects at 3 oclock now instead of 1. the red bumper looks sharp once installed in a clear tube
