anyone quickly swapout anti walk pins without removing the trigger assy???
and if the pins are marked .156 for hole recievers, but are also marked oversize for less play??? how do you tell if you might need to ream out any internal parts if the trigger is a drop in???
I wouldn’t be too comfortable putting oversized pins in my receivers.
I don’t know how tight these things are, but I’d guess you’d be able to use the existing pins as slave pins.
In my opinion you’d be removing the better pins though.
really? you prefer the reg pins? no worry about them walking out unexpectedly?
i just put the ‘oversized’ small pins in an old cast receiver (registered MG) today. it didn’t require removing any trigger components. just push the new pins in and the old ones pop out. the ‘oversize’ ones fit in easily. i’d characterize it as maybe snug, but definitely not tight. it’s the only one i’ve done. none of my other ARs would benefit from the pins.
Greetings!
Still a greenie here and am curious to know how do I find out what size to order for a my Noveske.N4LR? I don’t have any precise measuring tools and such. With that in mind, would it be the large or small (1.54 or 1.55), were I to go with these KNS Precision Inc. anti-walk pins? I understand the “inexpensive insurance” part, but is it something to really consider for a new rifle? 
Thanks in advance!
Typically the anti walk pins are utilized in full auto’s. The over sized ones may be used for lowers that were set up for 9mm and maybe be enlarged or elongated because the bolt wasn’t ramped.
In my opinion, leave the stock ones in there and save your money.
if you must have, and the gun is new, go with the 154. If you ream the holes or force the 155’s, stock pins may never work again.
I’m sure it happens, but if your pins are walking on a semi auto lower, it probably wasn’t assembled correctly, you monkey with the lower by taking it apart all of the time or you have out of spec parts. I’ve never seen pins walk out.
1. Call Noveske and ask them what size pins they use.
2. Small and large does not refer to .154 and .155 pins. It refers to the Milspec FCS primarily in Colt and FN guns that are .155 in. or the .170 in. that are used on most Colt semi-auto guns.
Just stick with the standard parts and you’ll be fine. The hammer pin is held in place by the “J” spring in the hammer and I don’t think you’ll be seeing a problem anytime soon. The trigger pin is held in place by the hammer spring. If it starts walking out buy a new hammer spring.
Thanks for the head’s up!
Again, thanks for the information!
Since my gun’s new–like 35 days old today–I’ll leave it alone as is. Just curious about these “anti walk pins” and all anyhow. . .
Thanks again!