HK MP5 .22 25 round magazine SPRING for the MP5-A5 & MP5-SD .22 rifle

HK MP5 .22 25 round magazine spring for the MP5-A5 & MP5-SD .22 rifle. A good supply of spare mag springs is a must. These are ideal to have on hand as the spring can become damaged or worn out. New fresh production mag spring for your HK Umarex MP5 .22 magazine. Please note: This spring can also be used to convert the 10 round magazine to a 25 round magazine. It has come to our attention that Walther has made changes on any new production 10 round mags that prevent them from being converted so this applies ONLY to the older style 10 round magazine without a permanent block installed.