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Most parts-kit castle nuts and end plates do the job and disappear. This Strike Industries combo does the job and gives your AR lower a real upgrade in both looks and function. The kit pairs a lengthened steel castle nut with an extended end plate that carries a Quick Detach sling swivel socket, all wearing a red hardcoat anodized finish that stands out against a black lower.
The standout feature here is where the QD socket lives. Instead of sitting flat against the receiver like a standard QD plate, the mount is pushed rearward and centered so it works the same for righties and lefties. That placement keeps the sling loop away from the webbing of your primary hand, which means no startling pinch when you're running the gun in tight spaces or under pressure. It's a small change that you notice every time you sling up.
The steel castle nut is lengthened to match the end plate and grab more of your receiver extension's threads. More thread engagement means a more solid lockup and a cleaner, matched profile from the buffer tube back. It also simplifies dropping in your takedown pin detent thanks to the set screw. One thing worth knowing before you install: because the castle nut is longer, you'll lose the fully collapsed position on most stocks, and your buffer tube needs at least 30mm (about 1.18 inches) of thread length to work with it. A quality receiver extension with generous threading is the way to go here.
Installation is straightforward for anyone who's timed a castle nut before. Reach for a proper spanner wrench rather than a multi-tool to avoid marring the finish, and keep torque at or under 35 ft-lbs. If you're running a mil-spec tube with full-length threads, you'll be set. Slap it on, snug it down, clip in a QD swivel, and you've got a carry-ready sling point plus a splash of color that ties a build together.
It needs a receiver extension with at least 30mm (roughly 1.18 inches) of thread length where the tube meets the lower. Standard mil-spec tubes with full-length threading generally work fine, but some proprietary or short-threaded tubes may not leave enough room for the longer castle nut. If you're running an aftermarket tube, check your thread length before ordering.
Yes. The QD sling swivel socket is positioned in the center of the extended end plate, so it functions ambidextrously. Whether you sling on the left or right side, the mount sits back from your support hand to keep the sling out of the way.
You'll lose the fully collapsed position on most stocks. Because the castle nut is lengthened to grab more thread and clear the QD socket, the stock won't slide all the way in against the receiver. For most builds this is a non-issue, but it's good to know going in.
A proper spanner wrench is the right tool for the job. A standard AR multi-tool can work but may scratch or damage the castle nut, so a dedicated wrench is worth it here. Torque the castle nut to no more than 35 ft-lbs.
| UPC | 708747545609 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | ARECN&EEPRED |
| Product Type | Castle Nut/End Plate |
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