Sprinco USA M4 Carbine Buffer Spring
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Spro USA
Overview
The Sprinco USA M4 Carbine Buffer Spring is a carbine-length spring designed specifically for the AR-15 platform. This buffer spring plays a critical role in the cycling of the action, ensuring reliable function and helping to manage recoil in builds utilizing a carbine gas system. It is commonly found in 5.56 NATO caliber builds, making it a go-to choice for those looking to enhance the performance of their rifle.
Specifications
August 2026 on GunPartPicker
Spro USA Sprinco USA M4 Carbine Buffer Spring ranked #18 of the 58 buffer springs builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #34 of the 96 buffer springs builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 2 of the 4 retailers we track have it in stock. Prices barely moved in August 2026, holding around $19.95, so there haven't been real sales lately. Buying today, the lowest price is $19.95 at AT3 Tactical, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Frequently Built With
The part most often added in each category by the 7 builds that include this one
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Phase 5 Extended Bolt Release V2 .308
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 1 →Builds in the community that include the Sprinco Usa M4 Carbine Buffer Spring
| Build | Parts | Total |
|---|---|---|
 | 24 | $1073.69 |
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