Strike Industries AR-15 Enhanced Castle Nut & Extended QD End Plate

SKU# 1874 | by Strike Industries
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Yet another first, the Enhanced Castle Nut and Extended End plate combo represent Strike Industries' dedication to thinking outside the box. The SI Enhanced ECN and EEP stand out from the generic parts kit units in both aesthetics and function. The steel castle nut has been lengthened to match the extended end plate, supporting more of the receiver extension's threaded area, and improving aesthetics. The extended end plate features a Quick Detach sling swivel mount, pushed back away from the webbing of the primary hand. This allows weapons manipulations in tight spaces and under stress, without the startling pain that can result from a pinched hand when using a sling attached to a standard, flat QD end plate.

 Note: Due to dimensional tolerances between some manufacturer's receiver extension collar lengths and differing amount of true threads on various buffer tubes, some may experience difficulties installing.  Please contact for a replacement castle nut if you cannot install.

Package includes:
- 1x Enhanced Castle Nut
- 1x Enhanced End Plate (Black, Blue, FDE, Red, Grey)
- 1x Set Screw

- Aesthetic upgrade
- Centrally placed QD for right or left hand sling use
- Easy drop in installation
- Simplified installation of takedown pin and detent via set screw.


Black - Blue - FDE - Red - Grey


-First position will be lost

-Recommended torque value 40 inch pounds

 -Weight: 1.87 oz.

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United States

nice look

Nice looking and I like the set screw for the spring/detent. Had a problem with the nut cracking when tightened in one small little cutout. Sent them a picture. Strike was great and got one out to me within a week or so.

Victor R.
United States

castle nut

exelente. me encantó como se ven mis rifles ahora!!!!!!!

Victor R. verified customer review of Strike Industries AR-15 Enhanced Castle Nut & Extended QD End Plate
Edward E.
United States

Great products

Great product!!! Looks Great Please carry more Strike industries product

John C.
United States

Great Addition

I really like this product. Especially the quick release and more so the detent spring *****.. I attached everything dropped my spring into the hole followed with the allen adjust tension BINGO. I would recommend this to my very best friend.

Ches C.
United States

Great site for AR equipment

These guys have A LOT of stuff. Went through a build of 3 guns. Found everything here that I couldn't find elsewhere and at great pricing. I dumped my shopping carts at other sites when I found this site. I just bought everything here at the AR one stop shop. Was a perfect find at a perfect time. Fast deliveries. Great quality items.

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