Details
Details
The KNS Precision PERMA PIN Firing Pin Retaining Pin replaces the standard cotter pin used in MIL-SPEC bolt carrier groups with a solid pin as originally designed by the great Eugene Stoner. The original cotter pins can be finicky to install, but the PERMA Pin is a fast and simple drop-in upgrade that makes reassembling your bolt carrier group a breeze. Each pin has been precision machined with high strength tool steel to ensure a reliable and long-lasting improvement you can depend on. Whether you have a single AR-15 or many, the PERMA Pin is a small upgrade that you'll appreciate every time you clean your rifle!
Features:
- Solid machined tool steel
- Snag free flat-cap design
- Durable finish
- Fast and easy drop-in replacement
- Replaces the firing pin retaining cotter pin
California Prop 65 warning
WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.Ratings & Reviews
27 reviews
Worth the few bucks for your firearm.
by Jacob -
My first time disassembling my AR's BCG was the first time I ever broke the stock retaining pin. This KNS is wonderful! I've taken the BCG apart dozens of times and it hasn't broken yet. About to buy some more as backups.
broke on install
by bob
prongs broke off on the first attempt to install in my anderson bcg.
KNS FPS pin
by anthony durning
fits well, have not ran in rounds yet. as for primary arms, price was right, shipping was fast as always.
KNS AR15 Firing pin retaing pin
by Larry Creech
worked great
Works well
by Matt Nelson
Very consistent tension, the cotter keys always seem all over the place, some are loose, some are tight, some don't line up real great. These fit right, and fit the same every time, picked up a couple more.
Perfect fit CMMG AR15
by brett
Replaced the original bent cotter pin in a CMMG AR15. Nice fit. Moderate pressure to fully seat.
Works great
by Andrew zajicek
Recently got a 7.62x39 AR pistol and it would destroy the firing pin retaining pins after every trip to the range. Replaced it with the perma pin and so far It's taken the beating without fail.
KNS AR15/M16 Firing Pin Retaining Pin
by K31Swiss
Quality part. Does what it's supposed to. Good fit.
KNS firing pin retaining pin.
by Paul Whitten
My first AR had these, but in Stainless Steel. Work just fine though, snug fit, ain't gonna fall out!
KNS AR15/M16 Firing Pin Retaining Pin
by R. Kim Woodman
much better than Mil-Spec..