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Spro USA
Overview
The Sprinco USA XP Buffer Spring Kit includes an XP buffer spring and a dual extractor spring set specifically designed for the AR-15 platform. The XP designation indicates a higher power spring, which enhances the cycling speed of the action, making it ideal for builds that require reliable operation under varied conditions. This kit is often found in mid-length gas system builds chambered in 5.56 NATO, where optimal performance and reliability are crucial.
Prices checked
Spro USA Sprinco USA Spring KIT- Xp Buffer Spring W/ Dual Extractor Spring Set is the seventh most added buffer spring on GunPartPicker so far in October 2026, behind the Strike Industries AR Carbine Flat Wire Spring, with about 4% of all buffer springs added to builds. Down from #5 in September. Builds with this buffer spring are mostly chambered in 5.56 NATO (71%), split between mid-length (47%) and carbine-length (24%) gas systems, and mostly AR-15 (88%).
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 2 of the 3 retailers we track have it in stock. Prices barely moved in September 2026, holding around $23.99, so there haven't been real sales lately. Buying today, the lowest price is $23.99 at Brownells, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
We ranked every buffer spring by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Buffer Spring Guide →Check it against the live catalog:
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Sprinco Usa Spring Kit- Xp Buffer Spring W/ Dual Extractor Spring Set
| Build | Parts | Total |
|---|---|---|
 | 25 | $1750.95 |
 | 26 | $3198.47 |
 | 29 | $2716.76 |
 | 31 | $2784.92 |
 | 14 | $1675.57 |
 | 29 | $3921.40 |
 | 24 | $1525.32 |
 | 31 | $3525.91 |
 | 29 | $5346.79 |
1 global rating
Top reviews
Sprincos XP buffer spring with the dual extractor spring kit makes a noticeable difference in cycle smoothness. The chrome silicon spring resists fatigue compared to music wire. Dual extractor springs help with bolt grip on the case rim. Worth swapping during your next BCG service.
