This newest model has a 1/16" hole drilled through the center of the back of it to further lighten the firing pin and shorten lock time.
The firing pin sits just flush with the breech face of the slide which makes it virtually impossible to have any primer blowback.
Only for Single Action models !
Overall length = 2.630"
Can be fitted to DA by shortening the pin.
Weighs 4.2 grams.