1911 & 2011 Main/ Hammer Spring by ISMI
CAD designed and built to Aerospace specifications from chrome silicon, corrosion resistant, stainless steel or chrome vanadium for maximum durability, consistency and reliable performance. Built to aerospace specifications; heat treated, shot peened and fully stress relieved to minimize spring set.
We offer 4 different mainsprings for 1911 style pistols (full sized and commander):
2 are designed primarily for competition use and are wound from chrome silicon alloy.
2 are designed primarily for duty/carry/ self defense and are wound from stainless alloy because
it provides superior corrosion resistance.
- Chrome silicon: 15MS (15#) & 17MS (17#)
- Stainless alloy: 19SS (19#) & 22SS (22#)
Important Warning: Modification to your firearm may nullify the manufacturers warranty. This product must be installed by a qualified gunsmith. No liability is expressed or implied for damage or injury which may result from improper installation or use of this product.
