Sprinco USA Spring KIT-Xp Buffer &Enhanced 4COIL Bolt Extractor Spring
Click to see full view
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
Build history on GunPartPicker
Builders on GunPartPicker first added the Spro USA Sprinco USA Spring KIT-Xp Buffer &Enhanced 4COIL Bolt Extractor Spring to a build in March 2026.
Today the one retailer we track has it in stock. Buying today, the lowest price is $26.99 at Ammunition Depot.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
Not sure which buffer spring to pick?
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:
Frequently Built With
Popular alongside buffer springs on GunPartPicker
Aero Precision Stripped M4E1 AR-15 Lower Receiver - Special Edition - Freedom
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Strike Industries Ambidextrous Magazine Release, Black - ARAMBIMRBK
Wilson Combat AR-15 Starburst Gunfighter Pistol Grip Black
CMMG AR-15 Carbine Buffer Assembly - 55CA977
Timber Creek Outdoors Ambidextrous Safety Selector - Black
Builds Featuring This Part
See all 1 →Builds in the community that include the Sprinco Usa Spring Kit-Xp Buffer &Enhanced 4coil Bolt Extractor Spring
| Build | Parts | Total |
|---|---|---|
 | 22 | $1801.97 |
No reviews yet. Be the first to review this product!