Primary Weapon Systems Ratchet Lock Castle Nut & Endplate Set
- Machined from steel
- Hardcoat anodized
- Rock solid without staking
- Easy to remove
- QD sling attachment slot
The mission at Primary Weapons Systems is to provide the highest quality sporting/tactical rifles and accessories for sportsmen, military, and law enforcement at a fair, competitive price.
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
Such a simple yet ingenious device.
by HE Johnson
Staking the castle nut is a pain especially without the right tool, unfortunately the tool is a bit too expensive for me personally. This simple design not only eliminates the need to permanently deform both the carbine tube and castle nut you can also remove it if ever needed. Plus the price cannot be beat.
by John -
These castle nuts initially seemed awesome, but after having several for a while I have found that they eventually come loose. The problem is, they dont actually "ratchet" at all. There is a small metal dimple that is displaced by the force you use to tighten the nut down, and once displaced initially tends to allow the nut to back off with normal use. The remedy is to either A) keep checking and re-torquing these down, or B) just stake the castle nut like you should do in the first place. YMMV, but all 3 of mine have backed off.
Zero chance it comes loose
Not sure what the other reviewer did wrong on install, but there is zero chance this thing comes loose…ZERO
Quality part and functionality
by Jordan -
This is a quality end plate and castle nut. I used this on my very first build and have had no issues. I also enjoy the finish on these parts