The UAC Match Grade Steel Hammer & Sear Set For TM M&P9 is constructed by precision CNC with carbon steel. The tight tolerance ensure the hammer & sear are in perfect shape. No burr is left behind, so no modify are needed. It was re-designed and resolve the sluggish problem that the stock hammer & sear have. It helps to smooth each cocking and lighten the trigger pull weight. Titanium carbon nitride (TiCN) coating is used on the finishing to reduce the galling and friction. This is the most professional hammer & sear set ever made for airsoft TM M&P 9 and perfect for competition or wargame.
*PS: Please note: installing parts / assemble /fitting airsoft gun will need intermediate knowledge; for expert or airsoft gunsmith. Please refer to your airsoft gunsmith for proper installation / fitting. Fitting may be needed as the condition of each airsoft gun might be different.