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I don't think the original style pins are likely to rotate in the receiver. The springs put a bit of pressure against the pins and there is a bit of natural sticktion when it's steel & aluminum. It only makes sense to size the pins & holes so the harder hammer & trigger rotate around the pin than to have the pin to rotate in the aluminum receiver and cause fretting.
The pins fretting in the receiver isn't a problem, otherwise we'd be complaining about all the threads concerning the use of steel bushings to repair worn pin holes
INSIDE PLAN OF BOX
- ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
- MATCH SCRATCHES ON MATCH-BOX
- MATCH LIGHTS FUSE TO TNT
- BOOM!
- HA-HA!!
-WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"
I am American
Hmm, I'll have to go check mine. Still, I don't believe it to be a real problem
INSIDE PLAN OF BOX
- ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
- MATCH SCRATCHES ON MATCH-BOX
- MATCH LIGHTS FUSE TO TNT
- BOOM!
- HA-HA!!
-WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"
I am American
Im not really worried about my FCG holes egging out. Like you said, it takes more trigger pulls than I could ever put on it and is it ever did happen, there are fixes for it.
I can see why someone would want to use them on an 80% lower that was only Cerakoted and not Anodized. I don't think Cerakote is as hard as anodizing.
Sent from my SM-G900T using Tapatalk
Look closely at your pins as you cock the hammer and press the trigger. The hammer pin will rotate with the hammer due to the J-Spring inside the hammer that captures the pin.
When pressing the trigger, the trigger pin will rotate slightly but not nearly as much as the hammer pin. It pretty much just rocks back and forth.
Sent from my SM-G900T using Tapatalk
This is where I see KNS pins as beneficial. Not necessarily from wear issues but from out of spec issues. When people see the .156 pin hole spec and ram a 5/32 (.15625) drill bit through the lower that actually makes a .158ish hole not realizing that there wont be a level 3 anodize to build the surface back somewhat. Then they install .154 pins and wonder "why so much slop?" KNS pins will actually keep the trigger to hammer relationship at the right distance.
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