Secured my buffer tube on my new 5.56 build with absolutely zero issues. This thing is built solid and the anti-rotate feature is a smart addition. Couldn't ask for more from a basic AR component like this.


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Strike Industries
Overview
The Strike Industries End Plate and Anti-Rotate Castle Nut is a standard steel component designed to secure the buffer tube to the receiver while preventing any rotational movement. This combination provides a reliable foundation for your AR-15 build, ensuring that the buffer tube remains aligned during operation. You will often find this end plate and castle nut set used in mid-length gas system builds chambered in 5.56 NATO, where durability and stability are essential.
Based on build data

Rise Armament Ar-15 Magazine Release Button - Rise Red

Strike Industries Cobra Billet Aluminum Trigger Guard - Red

Timber Creek Outdoors Ar-15 Takedown Pin Set - Red

Strike Industries Carbine Length Pistol Buffer Tube - Red

Strike Industries Ar-15 Ambidextrous Safety Selector Switch - Red

Strike Industries 7075 T6 Aluminum AR Pistol Buffer Tube, Red - ARSPRESLICKRED
Aggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Rise Armament Ar-15 Magazine Release Button - Rise Red | 142 | |
| Strike Industries Cobra Billet Aluminum Trigger Guard - Red | 136 | |
| Timber Creek Outdoors Ar-15 Takedown Pin Set - Red | 119 | |
| Strike Industries Carbine Length Pistol Buffer Tube - Red | 113 | |
| Strike Industries Ar-15 Ambidextrous Safety Selector Switch - Red | 100 | |
| Strike Industries 7075 T6 Aluminum AR Pistol Buffer Tube, Red - ARSPRESLICKRED | 84 |
| Platform | Percentage |
|---|---|
| AR-15 | 60% |
| AR-10 | 40% |
| Caliber | Percentage |
|---|---|
| .223 Wylde | 33.3% |
| .308 Win | 16.7% |
| .450 Bushmaster | 16.7% |
| 300 Blackout | 16.7% |
| 5.56 NATO | 16.7% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 60% |
| Pistol | 20% |
| Rifle | 20% |
Builds in the community that include the Strike Industries End Plate and Anti-Rotate Castle Nut for Receivers, Red - SI-AR-UL-MFEP&ACN-RED
| Build | Parts | Total |
|---|---|---|
![]() | 30 | $5221.96 |
![]() | 27 | $2127.33 |
![]() | 28 | $2601.51 |
![]() | 37 | $6257.33 |
![]() | 22 | $2911.07 |
![]() | 19 | $660.63 |
![]() | 25 | $1889.81 |
![]() | 22 | $1989.10 |
![]() | 34 | $4624.85 |
![]() | 24 | $1519.18 |
![]() | 22 | $1231.53 |
![]() | 19 | $493.53 |
4 global ratings
Secured my buffer tube on my new 5.56 build with absolutely zero issues. This thing is built solid and the anti-rotate feature is a smart addition. Couldn't ask for more from a basic AR component like this.
It's an end plate and castle nut set. Does what it's supposed to do by keeping the buffer tube in place. The steel feels standard, not premium but not flimsy either. The red color adds a bit of pop.
Was looking for a reliable way to keep my buffer tube from spinning during installation and operation. This SI set does the job perfectly. The castle nut staked well and the end plate design prevents any wobble. Great for AR builds.
This Strike Industries end plate and castle nut feels sturdy enough. The red color is a nice touch for my build, though it was slightly darker than I expected from the photos online. Overall, it holds the buffer tube securely.