I've seen a number of pictures that show what looks like safety wire between the pins for the trigger group.
What is the purpose of this?
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I've seen a number of pictures that show what looks like safety wire between the pins for the trigger group.
What is the purpose of this?
I'm pretty sure you're seeing KNS anti-rotation pins, not safety wire. These pins prevent the hammer/trigger pins from rotating.
I agree with Mark with regards to their supposed utility. Over the years, I've heard more than a few NFA folks say the pins might help keep the pin holes on your non-replaceable registered lower from "wallowing" out over time. I've yet to see a receiver that was ruined by "wallowed" pin holes, so it's likely just a myth. On a semi-auto rifle, I'd imagine they are simply bling.
However, there is little doubt that these pins will lighten your wallet...which usually leads to higher speed and lower drag on TOS.
useless.
I've seen a lot of well worn Colt 613 and none of them need those KNS pins after many years of abuse
Yep slowly disengage the hammer to relieve some tension. Get a good punch and a gunsmith hammer if you have one. I like to tap from the left to the right, and then right to the left when installing. First the hammer than the trigger.
As Kimbo stated there is a proper way and you just proved my point. When you get a monkey (that's a general term and doesn't necessarily apply to you) with no training trying to pound the trigger pin out while the hammer is still in place it becomes evident. That's because they don't know know that the trigger pin is held in place by the hammer spring. They also don't line up the hammer pin correctly and just try to pound it in because as we all know a bigger hammer is always the right answer.
Add to the mix people using the wrong size punches and other incorrect tools and you can see just how it happens.
Removed
If KNS pins were necessary, the Army would be using them.
Just my $0.02.
I have read that some people install them on their NFA weapons as cheap insurance/piece of mind that they won't have problems with their registered lower.
I had one lower that had slightly oversize pin holes. I added the KNS set on that one for that one issue. It worked so no worries. On most carbines they are a waste of time.
Tacticool bling.
Nope...I personally have had my trigger pin walk out and create a total stoppage on an LMT semi-auto lower that was properly assembled, and fairly new (leass than 2,000 rounds). It does happen and it is "insurance". Just like all "insurance" it's there IF you need it even though you may never need it., and an inexpensive preventative maintenance modification.
NFA and 9mm.
As some folks posted, cheap insurance on a $12K+ receiver. Mind you, you might be taught that there are very limited times you ever would need to go to Full Auto, the folks that tend to own NFA items own them just so they CAN go Full Auto and my unscientific observation is that they fire Full Auto a hell of a lot more than semi-auto.
Why: BECAUSE ITS FUN!
9mm conversions tend to be hard on the hammer, directly effecting the trigger pin. Lots of issues with trigger slap, etc. A lot of folks years ago had issues with the hammer pin holes egging out, typically on less than stellar recievers. This tends to be from the geometry on the BCg(really just 1 unit in 9mm) The BC is not ramped in 9mm as it is for a regular carriers. So the pins do not fix the issues. Having your 9mm bolt "ramped" would. Again - very big issue if you like firing your M16 in 9mm Full Auto.
This mod is more in line with the folks on subguns.com than on this site.
I have them on my rifles. I use to have issues with the pins on my LMT SBR so I installed the KNS pins and !poof! no more issues. People are right in that 99.99% of the worlds shooters will never even realize the need for them. However for only $35 I just install them from the get go for insurance...........a just cuz item.
Besides I only put them on there for the same reason I put other shit on my rifles....CDI man, CDI!! :cool:
I have had pins walk both here and abroad and look at it like others have said as cheap insurance so I use them on all my lowers.