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Posted: 3/8/2006 10:32:32 AM EDT
I've searched and cannot find a fix for this. The trigger pin and hammer pin both spin w/ the respective part. They are not walking out, just spinning in the reciever w/ the movement of the hammer/trigger. So what / how do I fix it?
Link Posted: 3/8/2006 10:37:52 AM EDT
Buy a set of KNS anti-rotation pins.
Link Posted: 3/8/2006 10:39:12 AM EDT
Well , given the fact my eyes are generally on the scope, Aimpoint red-dot or front sight post, I have never in my life actually noticed, whether this occurs on any of the my AR15s I have owned over the decades.

How in the heck would one know this was happening in the first place?

As long as my pins ain't walkin, I could care less, YMMV.

Mike
Link Posted: 3/8/2006 10:52:57 AM EDT

Originally Posted By mr_wilson:
Well he
How in the heck would one know this was happening in the first place?

As long as my pins ain't walkin, I could care less, YMMV.

Mike



Well I had read something about it after discovering this forum. So today I took off the upper and released the hammer. My pins are slightly scarred from being taken out previously. I moved the hammer back and forth and the trigger, and could notice the marks on the pins moving w/ the hammer and trigger. So that is how I noticed.

Those KNS pins look like a good idea, however having those connecting pieces on the outside of the reciever is far less than attractive.
Link Posted: 3/8/2006 11:13:23 AM EDT

Originally Posted By 98hd:
Well I had read something about it after discovering this forum. So today I took off the upper and released the hammer. My pins are slightly scarred from being taken out previously. I moved the hammer back and forth and the trigger, and could notice the marks on the pins moving w/ the hammer and trigger. So that is how I noticed.

Those KNS pins look like a good idea, however having those connecting pieces on the outside of the reciever is far less than attractive.



It will grow on you. Most M16 owners use them to keep their holes from wearing out.... so you can pretend your toy has NFA cool factor.
Link Posted: 3/8/2006 11:25:36 AM EDT

Originally Posted By FALARAK:


It will grow on you. Most M16 owners use them to keep their holes from wearing out.... so you can pretend your toy has NFA cool factor.



I suppose it's better than letting the pins wear in a perfectly good lower.
Link Posted: 3/8/2006 3:37:14 PM EDT
Are the KNS anti-rotation pins really necessary? I plan to shoot a lot through my lowers. I just don't want it to wear out to the point the pins walk out and turn the rifle into a $800+ club.
Link Posted: 3/8/2006 4:32:45 PM EDT
Link Posted: 3/8/2006 9:03:11 PM EDT
Link Posted: 3/10/2006 5:17:54 AM EDT

What a coincidence!

I was going to ask this very same question yesterday.
Dano523 has a very good answer to this question. Thanks!

A possible solution that had occured to me was the use of pins that
are .155 in diameter rather than the standard .154.
These pins are available from Brownells or from Rock River Arms.
RRA refers to them as NM (National Match) hammer pins.

I wasn't sure if they would provide enough friction in a receiver
hole that has been somewhat worn.

A different possibility is to buy some ,174 pins and chuck them up
in a drill in order to "sand" them down to the exact size to fit snugly
into the receiver pin hole.
The newly sized pins would need to have the middle groove reground
as well. This would be a bit of work but not all that tough to do.

Any more thoughts on this?
Link Posted: 3/10/2006 8:36:30 AM EDT

Originally Posted By GFrancis:
What a coincidence!

I was going to ask this very same question yesterday.
Dano523 has a very good answer to this question. Thanks!

A possible solution that had occured to me was the use of pins that
are .155 in diameter rather than the standard .154.
These pins are available from Brownells or from Rock River Arms.
RRA refers to them as NM (National Match) hammer pins.

I wasn't sure if they would provide enough friction in a receiver
hole that has been somewhat worn.

A different possibility is to buy some ,174 pins and chuck them up
in a drill in order to "sand" them down to the exact size to fit snugly
into the receiver pin hole.
The newly sized pins would need to have the middle groove reground
as well. This would be a bit of work but not all that tough to do.

Any more thoughts on this?



I had thought of the same thing, only probelm for me is I have the larger pins, I was looking at the KNS setup on brownells, and they had .155 pin kits (w/o the anti rotation setup) and a reamer available. Might want to look into that.
Link Posted: 3/10/2006 10:30:59 AM EDT
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