I use KNS hammer and trigger pins in my transferable M16s as they are cheap insurance against wear on the hammer/trigger pin holes on a receiver that cannot be replaced.
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I use KNS hammer and trigger pins in my transferable M16s as they are cheap insurance against wear on the hammer/trigger pin holes on a receiver that cannot be replaced.
I want everyone to forget anything they think or know about KNS pins and the alleged relevancy.
Now lets' look at the situation with clear eyes and ask yourself the following;
1. If the movement of the hammer and trigger pins was so critical, doesn't it seem logical the military would have addressed it after almost 50 years of service? After all, all U.S. military M16's/M4's are either full auto or 3 round burst.
2. If this was in fact an issue, the U.S. military would have to have gone though alot of lower receivers and someone would have identified this as a serious issue (these are serial numbered items).
3. Can anyone provide credible proof of hundreds or thousands of M16/M4 lowers that have been scrapped due to this design flaw?
4. There are some U.S. military units that shoot thousands of rounds in a week. This would mean that these weapons shoot more in a short period of time than most AR owners in a lifetime, to include those with registered Pre-86 guns. Yet, no one has stepped forward to validate any claims of the vast trigger/hammer pin conspiracy being covered up by the U.S. military.
I have said this numerous times and I will say it again. Most all damage that can be traced back to the holes of the trigger and hammer can be traced to people hitting on pins with hammers and other blunt objects. Sticking punches and other objects into the holes and damaging them or they are using old or out of spec parts (after all, if it is old and it wears that means it is in fact no longer in spec) and in some cases as we have seen first hand here on M4C personnel who have assembled the FCG incorrectly and the parts are not performing as they should. Additionally we can have lowers with holes that are out of spec as well. Then we combine all of these issues and we hear the dreaded Nightmare on M4 Street tales about needing KNS pins because their parts will not stay in place.
Owner/Instructor at Semper Paratus Arms
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Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com
As promised earlier in the thread, here are pics of the bolt. I don't know hardly anything about 9mm AR's. Is this ramped or not? (looks not to me, but I don't really know what I'm looking for).
635 bolt 3 by ASH556, on Flickr
635 bolt 2 by ASH556, on Flickr
635 bolt 1 by ASH556, on Flickr
Semper Paratus Certified AR15 Armorer
They do look pretty snazzy though ...
Is the Colt still in rental service with a broken hammer pin? Personally, I would have replaced the broken pin with a new one, rental unit or not.
I can't see your pictures to well so here is what you should be looking for:
The old style 9mm bolts were reverse ramped. This design acted as a speed break to slow the bolt down. In doing so, an incredible amount of energy was transfered to the hammer pin.
The new style 9mm bolts are ramped the same direction as 5.56 bolt carrier.
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