Primary Weapons Systems Ratchet Lock Castle Nut and End Plate Set

Primary Weapons Systems Ratchet Lock Castle Nut and End Plate Set

Product Code:
Calculated at Checkout
$29.95 $25.46



  • Integrated QD mount
  • Compatible with both Mil-Spec & commercial buffer tubes
  • Eliminates the need for staking


  • Material: 4140 Steel
  • Finish: Black
  • Weight:
    • Ratchet Lock Castle Nut: 0.55 oz.
    • QD End Plate: 0.6 oz.


  • AR-15 and AR-10


  • 1x PWS Ratchet Lock Castle Nut
  • 1x PWS QD End Plate


Most of us are guilty of a false belief that for something to be important it needs to be big and flashy. We all fall under the spell of a hot new manufacturer or succumb to the wiles of the do-hickey of the month now and then. The fact is that evolution isn’t just something that happens in big leaps. Sometimes it’s a small change that gives you a new leg up on the game. Primary Weapons Systems understands that. When they say they believe in strength through evolution, they’re talking about the whole package, not just the big expensive components. Case in point: The PWS Ratchet Lock Castle Nut and End Plate Set. Yes, it’s just a castle nut and end plate. It’s a pretty simple combination, yet the Ratchet Lock Castle Nut raises the bar in buffer tube attachment.

Primary Weapons Ratcheting Castle Nut: No More Staking

The Primary Weapons Systems Ratchet Lock Castle Nut and End Plate Set allows the armorer to attach either commercial type or Mil-Spec Buffer Tubes to your weapon system without the pain-in-the-neck of staking. Yes, it’s secure, and guess what PWS created this option considering the possibility that you might want or need to change a buffer tube before your weapon deadline. You’re not married to the installation and it won’t require you to destroy anything to get it apart. You might even do it without any colorful language.

The end plate includes and integrated QD mounting point for your sling swivel so you can get hooked up and get on with it. Is it a huge thing? That depends on how bad you need it today. Is it an evolution? Definitely. Why do we need it? Because It's Time we stop suffering over the small stuff and evolve.

Write a Review

10 Reviews

  • Easy Peasy

    Posted by Gary on 9th Mar 2020

    My first build, I was slightly intimidated by torquing and staking of the castle nut. Who knows, is it 40 ft. lbs or 40 inch lbs., LOL. Anyhow, this ratcheting castle nut eliminated any trepidation I had. It's a but pricey, but for my first build, it was worth it. I just spun it on and tightened it good and snug. It's not backing off.

  • Primary Weapon System Ratchet Lock & Castle Nut & End Plate

    Posted by James L. on 20th Feb 2020

    Primary Weapon System Ratchet Lock is a whole lot best then staking you castle nut and you can take it off and on, and it looks better on your rifle.

  • Ratchet lock castle nut and end plate

    Posted by Roger Burns on 29th Sep 2019

    Works great no more steaking the castle nut

  • Easy

    Posted by Dan Upchurch on 9th Sep 2019

    easy to install and works great

  • nice

    Posted by Dale on 7th May 2019

    It works great!

  • Recommended

    Posted by Pete on 17th Mar 2019

    I agree with the other reviewers completely. It looks very good on the gun as well.

  • switching everything over to this

    Posted by Unknown on 28th Jul 2018

    Great set up easy to install locks everything down couple it with the PWS buffer tube and you have a rock solid platform for any stock.

  • Great design.

    Posted by Eric on 24th Feb 2018

    This is perfect for someone who is always tweaking their rifle and don’t take the finality of staking your castle but. I would buy this again

  • Easy install.

    Posted by Unknown on 7th Feb 2018

    Does what it’s supposed to do. Looks sharp.

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