MPN: Bolt Catch Retaining Pin


  • Replacement for the standard bolt catch roll pin
  • Tool-less installation - eliminate the risk of scratching you lower receiver during instillation
  • Made in the U.S.A.


  • Material: Steel
  • Finish: Black Nitride


  • Mil-Spec AR-15 lower receiver


  • 1x KNS Precision Bolt Catch Retaining Pin
  • 3x C-Clips


The Armorer’s job is simple: assemble a variety of parts into a working firearm. Okay, it’s not that simple. Especially when some of those parts have a mind of their own, or so it seems. Traditional bolt catch roll pins are the sort of wicked little parts that seem to exist just to make ordinarily even-tempered guys into foul-mouthed lunatics. If there’s any doubt in your mind, just try to send one of those little devils home and wait until that pretty lightning strike scratch appears on your new receiver when the punch slips. Fortunately, KNS Precision elected to take on the problem of installing bolt catch roll pins by designing one that you can install without destroying anything. The KNS Bolt Catch Retaining Pin is here to make you love building guns again.

Simple Installation and Secure Retention

It’s time to install the bolt catch retaining pin, forget the hammer and punch, KNS made life better than all that nonsense. Simply place your KNS Bolt Catch Retaining Pin though it’s proper holes in the receiver and the bolt catch after placing the catch, it’s spring and detent. After the pin is placed you’ll simply install the included c-clip to secure the KNS Bolt Catch Pin and you’re done. No cussing, no scratches, no problem.

KNS Precision Produces Quality Parts That Make Sense

KNS Precision manufactures parts that solve problems. From anti-rotation pin sets and pivot pins that don’t require special tools or an act of Congress to install properly to the KNS Bolt Catch Retaining Pin, everything KNS manufactures makes shooting life easier and more secure than the traditional parts they replace. When you want a change for the better, upgrade to a KNS Bolt Catch Pin.

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Reviews (3)


    Posted by Mark Gierke on 20th Mar 2021

    Another innovative product from KNS. If you have a steady hand and a needle nose pliers you can skip the hammering in of ordinary bolt catch pins. They give you 3 "e-clips" in case you lose any. If you do this on a white or light surface you probably won't. Just put the open side of the clip on the pin groove and push. It will snap on. Double check to make sure the pin is in the groove and you are good to go.

  • KNS bolt catch pin

    Posted by joseph on 22nd Dec 2019

    Too short for my lower, wont reach through for clip

  • Bolt catch retaining pin

    Posted by Steve on 25th Apr 2018

    These are awesome. A brilliant answer to a difficult, and time consuming problem in assembling AR lower receivers. I can have the bolt catch installed in less than 20 seconds. Only negative being the extremely small size of the c-clips. But they give you a couple extra in case you lose one!

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