It is made from solid

no special processing

and radiolucent

Made from carbon steel with a nickel finish

Featuring a Disc-O Tech module

Midwest Industries AR15 Drop-In Trigger 3.5lb Single Stage Curved SWAT It is made from solidMidwest Industries AR15 Drop In Trigger 3. 5lb Single Stage Curved Interior parts are S7 tool steel with heavy hit hardening then black nitride finished for enhanced strength and corrosion resistance. Lightened trigger pull (3. 5 lb. pull weight). Lightened hammer. Drop safety feature. Self contained design makes it easy and quick to install with no fine tuning needed. 3. 5lb Single stage trigger system Allows you shoot more accurately with less