KNS Precision Non-Rotating Pins AR-15 .154" - Black

I like the solid bars on this version. I used it on an Aero Precision M5 lower. It is maybe 1/32nd of an inch too wide for this so you can see a little daylight under the bars. However, it works as advertised and I may try trimming the pins so it will fit flush. Also, be careful tightening the screws as the threads are very fine and can strip with too much force.

I love KNS Pins on my higher end ar's. Does its job at retaining the trigger and hammer pins so they don't walk out. Easy to install every time, excellent packaging.

I ordered a small piece part under $10 and when i went to pick it up it was missing and on back order. As soon as they got some in they shipped it to me to save me a trip back to the shop and it came with a hat and stickers. Then called again to apologize. They have a customer for life now.

I purchased these for my 15/22 as the polymer receiver was not holding the fire control pins solidly after repeated removal tuning the fire control group to run my slide fire. These remove all possibility of the pins working their way out

I put these in every one of my builds. Easy install and added reliability. that plus Primary Arms great shipping and I get these every time

I review firearms and accessories for a living and I am very impressed with the quality and ease of installation of these pins. They compliment a drop in trigger perfectly. And primary arms has some of the fastest shipping I have seen. Thanks - chad from candrreviews

I use the KNS pins on all of my builds, and highly recommend them.In addition to keeping pin-walk from happening, they are also great at preventing pin hole elongation from extended wear on home-built non-anodized lower receivers.An added bonus of running one is that it gives a great place to keep your trigger finger indexed while doing dynamic shooting.Primary Arms has probably the best customer service anywhere. Every time I order something, the "it has shipped" email shows up rediculously fast!

I was very pleased with my first KNS non rotating pin set, I had to order another set for my newest AR15. Very easy installation.

I was very pleased with the quality of the anti-walk/non-rotating pins. Primary's price on these was awesome as well and fast shipping made it even better!

If you have a tired or high round count lower and you want to make sure your pins stays in its place, with a small investment this will help you with that issue or soon to be an issue.