AR15 M16 hammer pin roll

[sigfla]

Heard somewhere that you could get a kit that eliminated the hammer pin from rolling in the receiver and allowed the hammer to roll on the pin instead. Sounds like a good idea since it would stop wear on the receiver.

Not too worried about it with mine since it is a Bushmaster but the extra added insurance seems like a good idea.

[kanewtervalve]

I'm sure that Fulton Armory may have the answer. They are great people to deal with.

[UZI SBR AWC]

That item was argued at Subguns last week.

http://www.dsarms.com/images/triggerpinar.jpg


http://www.dsarms.com/item-detail.cfm?ID=KNS154&storeid=1&image=triggerpinar.jpg

[stymie]

sigfla...

Unless you switch to an open-bolt fire control system or do the 9mm conversion... you probably won't have an issue with receiver pin hole *egging* in a mil-spec M-16 5.56mm weapon.

[stymie]

Here's the poop on 9mm hammer/trigger pins...

Posted By: Charles Tatum <leantimesREMOVECAPS@aol.com>
Date: 3/18/03 14:51

In Response To: WTK: Newbie question re: M-16 hammer/trigger pins? (Will)

Colt designed the bolt carrier with a sharp face rather than the ramped type of bottom that you have on the .223 bolt carrier. There were reasons for doing this, but at any rate, this can cause trigger slap. What happens is that this sharp face hits the hammer and drives it back too violently so that it then strikes the disconnector, and then this metal to metal contact is transferred down into the trigger and into the shooter's finger. Having the bolt carrier ramped will alleviate this problem. Now, if you have this trigger slap, there is a lot of shock put on the trigger and hammer pins, and they would break. However, Colt then made some hardened stainless steel pins to keep this from happnening. Some people stated that these pins were so hard and the shock so great that it caused the holes in the receiver to elongate into the egg shape you described. If you have the bolt carrier ramped, you should not need the stainless steel pins. If you want to put them in for added insurance, that should be okay. If you have trigger slap and fire a lot of rounds through the 9mm, you can get egging of the pin holes anyway regardless of whether you are using stainless steel pins or not. So, I would get the bolt carrier ramped and go from there. I have seen trigger and hammer pins break in a .223. I have some stainless steel pins that I got from sawlesales.com also. I have not installed them in my .223 lower, but I got them after I was at the range and saw the guy with the .223 have both his trigger and hammer pins break at the same time. I posted on some boards, and no one had heard of this in .223, but I guess it does happen. So, if I were you, I would go ahead and buy a set of stainless steel pins to either install now or have on hand in case you have any problems, but I do not think you will once you have the bolt carrier ramped. You can ask the people at lawlesales.com. They are great people to work with.

Charles Tatum
Alamo Professional Arms