KAC-Knight's Armament SR-25 Magazine Spring, 20 Round (94181)
Replacement magazine spring for Knight's Armament SR25 20 round magazines
To purchase magazine click here
These springs are heated treated steel and may show some surface rust, it will happen when introduced to some humidity. Per KAC, you can use green Scotchbrite and CLP (Break free) to remove it. Please know this before ordering