The Sidewinder utilizes an all new high efficiency mono-core baffle made from 7075-T6 aluminum that is class 3 hardcoat anodized. The outer tube is made from 6061-T6 aircraft quality aluminum which is also finished with class 3 hardcoat anodize. These materials offer high strength and longevity in a lightweight package. Our Adapter, Nielsen Sleeve, Blast Baffle, and Rear Cap are constructed from heat treated 17-4ph stainless steel. This type of stainless steel is extremely resistant to corrosion and wear, and will not degrade when exposed to extreme temperatures. The Sidewinder is user serviceable which allows both the baffle and Nielsen device to be removed for cleaning and maintenance using the provided disassembly tool. Our Nielsen device enables flawless semi-automatic operation on all relevant host pistols. The Sidewinder has 12 index points that allow you to adjust point of impact while remaining attached to the host firearm. Normally $665 from YHM! It's on a form 3 ready to roll. Insured shipping is on me. I can accept a certified check or cash.