I just replaced 6 of my 24-year-old Uzi mag springs - (three 32-rd & three 25-rd) with Wolff gun springs. They are Xlnt & cheap! The +5% are perfect. Since the spring replacement, I've fired 2,600 rounds without a malfunction. Before replacing the springs, I was getting about 5 feed failures out of each 100 rounds. The 32-round springs are drop in (except for bending the tabs on the floorplate) & for the 25-rd, count the coils in your original spring & cut the replacement spring with a small bolt cutter. (a wire cutter won't do it).