ISMI premium springs are manufactured exclusively with certified aerospace spec alloys; stainless alloy and chrome silicon. Each spring has been heat treated, stress relieved and shot peened to enhance performance and durability. These extra steps and quality materials ensure consistency and longevity many times that of standard music wire springs. All springs carry a 12 month manufacturer replacement warranty.
perfect spring weight used with tungsten guide for my reloads
Home gunsmith/ open shooter
Perfect spring as labeled vs Wolf, Wolf is actually strong er as labeled and not as consistent.
Quick shipping, great products (STI 2011) Highly recommend Shooters Connection G. R .Gray
Its a spring. And ISMI. Been using them for a decade. Zero problems. Zero reason to use anything else.