Expo Arms AR-15 Carbine Length Buffer Spring
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Expo Arms
Overview
The Expo Arms AR-15 Carbine Length Buffer Spring is designed specifically for the AR-15 platform, providing the right tension and performance for carbine-length gas systems. This spring plays a crucial role in the cycling of the action, helping to ensure reliable feeding and ejection by absorbing the recoil energy and returning the bolt carrier group to battery. It is commonly found in builds that utilize a carbine gas system and are chambered in 5.56 NATO, making it a staple for those looking to optimize their AR-15's performance.
Specifications
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Price Alert
September 2026 on GunPartPicker
Expo Arms AR-15 Carbine Length Buffer Spring ranked #33 of the 57 buffer springs builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #64 of the 101 buffer springs builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today the one retailer we track has it in stock. Prices barely moved in September 2026, holding around $3.95, so there haven't been real sales lately. Buying today, the lowest price is $3.95 at Primary Arms, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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