KVP Pistol Caliber Carbine XP Recoil Spring

Features

1. 17-4 Stainless Steel Construction — Built from corrosion-resistant 17-4 PH stainless for long service life and consistent spring rate under heavy blowback cycling.
2. Extra Power Preload — Increased preload over standard carbine springs slows bolt carrier velocity and tames the violent impulse typical of blowback PCC actions.
3. Extended Dwell Time — Higher spring tension lengthens dwell, giving chamber pressure more time to drop before unlocking for cleaner extraction and ejection.
4. Pistol Caliber AR Optimized — Engineered specifically for 9mm, .40 S&W, 10mm, and .45 ACP blowback AR-15 carbines and pistol kits.
5. Carbine Length Buffer Tube Fit — Sized to drop into any mil-spec or commercial carbine-length receiver extension — no modification required.
6. Quieter Action Cycle — Reduced bolt carrier slap dampens mechanical noise, making it a strong pairing with a suppressor.
7. Reduced Wear on Internals — Lower impact velocity protects the buffer retainer, takedown pins, and lower receiver from accelerated battering common with blowback PCCs.
8. Direct Drop-In Upgrade — Swaps in for the factory carbine recoil spring in seconds with no gunsmithing or tuning tools required.