AR pistol stiff hammer spring (help please)

[iRon sight SD]

I'm not sure if I have the section to post this question in so please move if necessary.

Story, I milled out an 80% lower some time last year and just began to put it together into an SSE pistol. Picked up a PSA lpk and Geissele trigger. Everything went in smoothly except the hammer pin. I think I may have milled it a little more narrow internally than optimal.

It took me a while to put the hammer pin into the lower, my hands simultaneously shoving a punch in one side while trying to shove the pin in the other. It finally worked however there seems to be some sort of binding causing the trigger to have a bit of a stiffer pull. The hammer actually requires more force to push down by manually by hand as well.

I haven't shot it yet but I'm wondering if this will cause any problems or if there is a workaround? (possibly using smaller pins?)

I can't go back to the shop to re-mill it because of the ATF letter but I'm looking for some ideas. Your help is appreciated.

[Dumas1012]

Sounds like your trigger pin holes are not aligned or are bit too small. I would take the 5/32 drill bit and go back and forth through both holes at the same time. See if that helps with the binding.

I had the same problem with the safety holes. That method worked for me.

[bohoki]

i run into this every time the radius of my 8mm endmill doesnt leave enough clearance for the little tubes on the sides of the hammer to rotate freely so i have to pull out the dremmel and clean those areas a bit

[iRon sight SD]

Perfect, thanks guys. I'll try those ideas.

[Dumas1012]

It's not the end of the world if your trigger pin holes become wider. You can always use anti walk pins.

[iRon sight SD]

It's not the end of the world if your trigger pin holes become wider. You can always use anti walk pins.

That's what I was thinking, but I've read that Bill recommends against using KNS pins with his triggers. But if it works better and makes my trigger feel less like a glock, I'll be happy.