AKA M870 Blaster Upgrade Spring 1.5mm

Unleash your shotgun’s full potential with this high-tension piano wire spring, engineered for aka m870 (R1/R2/R3) and ZS M870 models.

✔ Brutal 1.5mm Thickness – Maximum power for outdoor play
✔ Anti-Fatigue Design – Holds tension 3x longer than stock
✔ Non-Linear Coiling – Smother pump action with hard-hitting shots

Why Upgrade?

• +30% FPS over factory springs

• Eliminates weak/sagging spring syndrome

• Essential for competitive shotgun builds

Package Includes:
1x Silver Piano Wire Spring