Discussion in 'On Topic' started by mtnbike4522, Sep 22, 2006.
If you assemble it right and it's not some sort of super sweet match rifle, you don't need em.
Pros: pins can't walk out or wear on receiver if one or the other is out of spec
Cons: none that I know of
I put them on my rifle after the hammer pin started walking out on me during a rifle class, no problems ever since.
good idea if you have a RR lower.
never built one.. Own a colt and bushy.
con is unnecessary expenditure
i installed KNS pins in the lower i just built....did i NEED them? no.....but i had the money and it never hurts to have em as an added feature....
u might be able to argue the need for a 20 dollar magpul triggerguard though....
if you have something like a registered receiver and want to maximize the life of it, sure, its $50 to protect a $14,000 gun.
To my understanding even if you buy the KNS set to be sure your trigger/hammer pins don't rotate, the pins joining the upper and lower can also wallow out over time.
At $30 I'm not sure you wouldn't be better to just buy a spare lower a few years down the road.
they make a pivot pin that expands for less movement. i think that helps.
KNS pins are useless for any lower that is unregistered. If you're shooting semi-auto, even at high volume, such as an individual who attends lots of classes or shoots on their own a LOT, you will still likely never see ovulation of the pin holes to any major degree.
If you shoot automatic fire through that reciever, however, the wear is much faster, as well as much greater per round. If you're a dealer, it's no big deal. Just as with any semi-auto lower, you can just purchase a new one when the old one wears out. If it's a registered lower, however, the cost of the KNS anti-rotating pins is well worth the investment. Given that ovulation of the pin holes would pretty much ruin the value of the reciever, the price of the KNS pins is worth it to save the life of a reciever that you actually shoot.
If it's a collector's piece, and you don't shoot it, then this doesn't even apply.