The ROOK Tactical Smooth Operator Safety Plunger for  GLOCK 9mm/10mm/.40/.357  is machined from 17-4PH Stainless Steel and is designed to smooth out and lighten the trigger take-up thanks to its finely machined surface.  The Sooth Radius retains the correct firing pin timing while improving the interaction between the trigger beak and the safety plunger to turn your trigger into one SMOOTH OPERATOR. 
 
DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.