Brownells M4 Buffer Spring
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Brownells
Overview
The Brownells M4 Buffer Spring is a buffer spring. Compare prices from multiple merchants and find the best deal.
Specifications
Build history on GunPartPicker
Builders on GunPartPicker first added the Brownells M4 Buffer Spring to a build in July 2026.
It was hard to find in August 2026, in stock on only 3 of the 11 days we checked, and today the one retailer we track has it in stock. The best price drifted down from $7.99 to $2.92 over August 2026 without a real sale. Buying today, the lowest price is $2.92 at Brownells, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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