SIG AIR P320 M17 Expansion Spring / Striker Ping Expansion Spring (# 02-7, 03-22)

SIG AIR P320 M17 Expansion Spring / Striker Ping Expansion Spring (# 02-7, 03-22) Metal Construction Design for Replace the Original Parts Suitable for SIG AIR P320 M17 Series Airsoft Gas Blow Back GBB Psitol