Sprinco USA M4 Carbine Reduced Power Buffer Spring
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Spro USA
Overview
The Sprinco USA M4 Carbine Reduced Power Buffer Spring is designed specifically for the AR-15 platform, offering a reduced power option that enhances the cycling of your firearm. With a carbine length, this spring helps to mitigate recoil and improve reliability, especially in builds that utilize a carbine gas system. This buffer spring is typically found in 5.56 NATO caliber configurations, making it a solid choice for those looking to optimize their lightweight builds.
Specifications
August 2026 on GunPartPicker
Spro USA Sprinco USA M4 Carbine Reduced Power 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 #27 of the 97 buffer springs builders have added. Builds with this buffer spring are nearly all chambered in 5.56 NATO, split between carbine-length (33%) and mid-length (33%) gas systems, and nearly all AR-15.
It was in stock most days in August 2026, but today only Palmetto State Armory has it in stock. It dipped to $16.96 at AT3 Tactical for a stretch in August 2026, well under its usual $19.95, so sales do come around. Buying today, the lowest price is $21.59 at Palmetto State Armory, above August's low of $16.96, so a better deal may come back.
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 15 builds that include this one
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 4 →Builds in the community that include the Sprinco Usa M4 Carbine Reduced Power Buffer Spring
| Build | Parts | Total |
|---|---|---|
 | 29 | $3842.37 |
 | 27 | $3384.99 |
 | 16 | $885.41 |
 | 27 | $3307.85 |
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