Sprinco USA AR-15 4-Coil Extractor Spring Upgrade Kit, 3-Pack

About this product

```html Upgrade Your AR-15’s Reliability with Sprinco’s 4-Coil Extractor Spring Kit Extractor spring failures cause most AR-15 malfunctions—weak ejection, stovepipes, or double-feeds. Sprinco’s 4-coil upgrade kit reinforces your bolt’s extraction power with precision-tempered springs that outlast factory components. This 3-pack ensures you’ll always have spares for high-round-count range days or tactical use. Ships discreetly to all 50 states. Key Specifications Material: Chrome silicon steel (heat-treated for fatigue resistance) Design: 4-coil configuration (vs. standard 2-coil) for increased tension Compatibility: Fits mil-spec AR-15/M16 bolts (5.56/.223) Contents: 3 extractor springs + 3 D-follower inserts Finish: Black oxide corrosion protection Why This Upgrade Matters The extractor claw is only as strong as the spring behind it. Factory springs weaken after ~1,000 rounds, losing the clamping force needed to grip spent casings. Sprinco’s 4-coil design maintains consistent pressure even with hot loads or fouled chambers—critical for defensive use or competition where failures aren’t an option. Chrome silicon steel handles repeated compression cycles without taking a set, unlike cheaper music wire springs. The D-follower insert prevents spring binding during bolt rotation, a common point of wear. This kit doesn’t just fix extraction issues—it prevents them before they happen. Three springs mean you can rotate them during cleaning (extending service life) or outfit multiple bolts. The black oxide finish reduces friction against the bolt carrier while resisting carbon buildup. No modifications needed—drop-in installation takes under a minute. Range tests show these springs maintain tension through 5,000+ rounds with proper maintenance. While no spring lasts forever, this kit gives you the margin of reliability needed for hard-use rifles. Compatibility Notes Works with all mil-spec AR-15 bolts (5.56/.223) Not for use with .300 BLK bolts (different extractor geometry