behind the striker. Looking at HDD instruction on a 13xx and it looks like the face is what engages the striker.
goer on ebay and BuyMyJunk on GunBroker for BOI and for sales that either didn't sell on the classifieds or couldn't. Search Scarboro on the BOI or BuyMyJunk.
if the striker. Changing the angle of the sear changes the engagement. Angle with a gentle slope makes a lighter trigger .. easily made unsafe with too flat of an angle.
Unknown to many modders, the notch cut about 1/3" behind the face of the striker face is a "safety notch" designed to catch the striker if the sear were accidently jarred free from the striker WITHOUT the trigger being pulled rearward. This prevents the striker from hitting the valve stem in case the gun is dropped or otherwise bumped. You can feel this notch by pulling the bolt reaward slightly and heaing the slight "click".
That safety notch is also why a trigger job on the 22xx trigger doesn't stay consistnt. If the sear isn't pulled far enough away from the striker barrel, the safety notch can "clip" the sear, putting a nick on the sear face, and actually causing a harder trigger pull.