|
||||||||||||||||||||||||||||||||||||||
I feel like a bit of an idjit for asking, but how does one measure the diameter of pin holes on a lower? I have a lower I think is out of spec and my non-scientific way of measuring was to use a 5/32 drill bit which went right through. 5/32" is 0.156, so unless I'm miserably misunderstanding tolerances, my lower's out of spec.
Unless you have machinist's measuring devices, you can't.
The trigger-hammer group is designed to retain the pins with two springs; the small spring staked into the hammer detents the hammer pin and the hammer mainspring detents the trigger pin.
If the small spring in the hammer is weak, or the detent groove in the pin is too shallow, the hammer pin will drift. If the hammer mainspring does not go into the detent groove on the trigger pin or the groove is too shallow the trigger pin will drift. If the spring in the hammer is doing its job, the hammer pin will generally rotate with the hammer.
Dave
Boonie Packer
With captive trigger groups, KNS pins make sense because spring tension isn't present (at least with most captive systems) to keep the pins in place.
I disagree with KNS pins for blowback/pistol caliber AR's because they don't let the user know immediately when a pin breaks (which could otherwise damage a system).
For most purposes, KNS pins are simple window-dressing. (Yes, I sport them on several AR's and I do not apologize)
Dave Merrill
Terrible Technical Writer. Awful Photographer. Lazy Instructor. Kind of a dick.
Loves Tacos.
Bookmarks