Sprinco USA Spring KIT-Xp Buffer &Enhanced 4COIL Bolt Extractor Spring
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Spro USA
Overview
The Sprinco USA Spring Kit-XP is designed to enhance the performance of your AR-15 by providing an XP (extra power) buffer spring. This heavier spring assists in reliable cycling and can improve extraction reliability by working more effectively with your bolt carrier group. Builders often incorporate this spring kit in setups that demand consistent performance under various conditions, particularly in tactical or competitive applications.
Specifications
Available Merchants(3)
Prices checked
Price Alert
Build history on GunPartPicker
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today 2 of the 3 retailers we track have it in stock. Prices barely moved in October 2026, holding around $26.99, with no real sale all month. Buying today, the lowest price is $23.59 at Palmetto State Armory, which matches the best price we saw in October.
Prices checked · refreshed daily across 37 retailers
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Builds Featuring This Part
See all builds →Builds in the community that include the Sprinco Usa Spring Kit-Xp Buffer &Enhanced 4coil Bolt Extractor Spring
| Build | Parts | Total |
|---|---|---|
 | 22 | $1718.63 |
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