AMG Magazine Spring For Umarex/ VFC HK416/ M4 GBB Airsoft (Winter Use)

AMG Magazine Spring For Umarex/ VFC HK416/ M4 GBB Airsoft (Winter Use) Metal Construction Airsoft Magazine Spring Design For Replace the Original Parts Improves feeding performance in colder weather and temperatures Suitable For Umarex/ VFC HK416/ M4 Gas Blow Back GBB Airsoft