This is a Wilson Combat Sear known as the Bullet Proof, model 417.
The Bullet Proof Sear Spring has the perfect balance of materials and temper to allow the pistol smith the flexibility necessary to do a top quality trigger job which will continue to maintain its tension long after factory springs would have died. For a Bullet Proof trigger job" get a Bullet Proof Sear Spring.
Features:
Maintains Tension
Perfect for Custom Trigger Job
