Pws Ratchet Lck Castle Nut/End Plate

The Primary Weapons Systems Ratchet Lock Castle Nut and End Plate is a smart upgrade for any rifle build or AR platform project. If you're tired of staking castle nuts or want a faster, more reliable way to secure your buffer tube, this assembly solves that problem with a simple ratcheting design that works on both mil-spec and commercial tubes—no special tools or gunsmithing required.

The ratcheting mechanism eliminates the need for traditional staking, which means no drilling, no peening, and no risk of damaging your tube finish. Installation is straightforward: thread it on, engage the ratchet, and you're done. Whether you're building a new upper or swapping components on an existing rifle, this end plate cuts assembly time while keeping everything locked in place under recoil and hard use.

The integrated QD sling slot on the end plate lets you attach your favorite quick-detach sling without adding bulk or extra hardware. It's the kind of practical, no-nonsense upgrade that gets noticed once you use it—the kind that makes you wonder why you didn't do it sooner.

Key Features

• Ratcheting design eliminates the need for staking
• Compatible with both mil-spec and commercial buffer tubes
• Quick-detach sling slot for fast sling attachment
• Easy installation with standard hand tools

Frequently Asked Questions

Will this work on my AR with a commercial buffer tube?

Yes. The PWS Ratchet Lock Castle Nut is engineered to work with both mil-spec and commercial diameter buffer tubes, so compatibility isn't an issue regardless of your tube type.

Do I need to stake it like a regular castle nut?

No. The ratcheting design locks it in place without staking. Once you thread it on and engage the ratchet, it stays secure—no drilling or peening required.

Can I attach a sling directly to this end plate?

Yes. The end plate features a QD sling slot, so you can mount your quick-detach sling hardware directly without needing a separate mount.