The Sig Sauer M11-A1 is an upgraded variant of the classic double action / single action P229, enhanced with features required by professionals. The internals of the M11-A1 are coated with a corrosion resistant phosphate coating, durable enough to surpass the military's 240 hour salt corrosion testing. The SRT (Short Reset Trigger) reduces travel by 60%, allowing for faster follow-up shots. Sig Sauer's black hard-coat finish over a stainless slide enhances the M11-A1's resistance to the elements and provides less friction with the slide moves. Shipped with a factory threaded barrel and night sights, the M11-A1 is suppressor ready without any additional upgrades.