Strike Industries AR Enhanced Castle Nut and Extended End Plate Flat Dark Earth Anodized Steel

The Strike Industries AR Enhanced Castle Nut and Extended End Plate combo is a matched upgrade for the AR-15 lower receiver, supplying both the locking nut for the buffer tube and an extended end plate with an integrated Quick Detach (QD) sling mount. The steel castle nut has been lengthened beyond the standard profile so it supports more of the receiver extension's threaded area, improving strength and aesthetics, while the extended end plate positions its central QD socket slightly aft of the receiver to keep the webbing of the primary hand clear during manipulation in tight spaces and to accept a QD sling swivel for either right- or left-hand use.

Both pieces are steel construction, finished in a durable Flat Dark Earth (FDE) anodize for a uniform, color-matched look on FDE builds. The set replaces the factory castle nut and standard end plate as a direct drop-in upgrade with no permanent modifications, giving the rear of the lower a cleaner, more deliberate appearance alongside the improved sling geometry.

Designed and produced by Strike Industries, this Enhanced Castle Nut and Extended End Plate combo is built for the AR-platform and installs using a standard castle-nut wrench.