Pro-Arms 140% Steel Recoil Spring for SIG AIR / VFC P320 M17 GBB

Pro-Arms 140% Steel Recoil Spring for SIG AIR / VFC P320 M17 GBB Steel Construction 140% Power Designed to increase the felt recoil impulse, durability, and cycling speed Suitable For SIG AIR P320 M17 GBB Pistol