The Strike Industries Multi-Function End Plate With Anti-Rotation Castle Nut for AR-15, Black is a end plate that fits AR-15.
The SI Multi-Function End Plate and Anti-Rotation Castle Nut are designed to modernize and improve the often overlooked castle nut and endplate system. While the traditional endplate and castle nut work very well in securing your receiver extension, peening the castle nut is not ideal for rebuilds. The MFEP and ACN include an anti-rotation QD socket or sling loops. Instead of peening the endplate to secure the castle nut, a set screw performs this task, allowing for multiple uses as you upgrade or update your build.
How It Compares
Also compare the Enhanced Castle Nut w/ QD for AR-15, Ultra Light Takedown Pins for AR-15 and Extended Magazine Plate for Glock 17/22 Magazine. Browse all AR-15 Parts and the full Strike Industries range. New to this? Read our guide: AR-15 Upgrades: Charging Handles, Safeties, Buffers and Muzzle Devices.
Ideal For
- AR-15 builders who want to avoid peening or staking the castle nut
- Rebuilds and upgrades, since a set screw secures the castle nut instead
- Sling users who want an anti-rotate QD socket or sling loops
- Easier installation, with a set screw retaining the takedown pin and detent
Key Features
- Set screw to retain takedown pin and detent for ease of installation
- No peening or staking needed with the Anti-Rotation Castle Nut/End Plate design
- Anti-rotate QD socket
- Multiple sling attachment points
Compatibility & Fitment
Fits AR-15. Not sure it fits? Contact us before you order and we will check for you.
Technical Specifications
Brand | Strike Industries |
Type | End Plate |
Description | Fits AR15 |
Platform | AR-15 |
Color | Black |
MPN | SI-AR-MFEP-ACN |
UPC | 708747546309 |
US Shipping & Support
Genuine Strike Industries, brand new and covered by the manufacturer's warranty. Shipping is free on US orders of $99 or more, and smaller orders ship from $6.95. Questions about fit, mounting or which option suits your setup? Our team is glad to help before and after your purchase.
Frequently Asked Questions
What does the Multi-Function End Plate With Anti-Rotation Castle Nut fit?
Fits AR-15.
Is this a genuine Strike Industries product?
Yes. It is a new, genuine Strike Industries product sourced through an authorized US distributor.
How much is shipping?
Shipping is free on US orders of $99 or more. Orders under $99 ship at a flat rate from $6.95 to $9.95, depending on the order total.
