End Plate Kit - Mil Spec - End Plate and Castle Nut

Mil-Spec End Plate and Castle Nut for AR Carbine Builds

This End Plate Kit pairs a mil-spec end plate and castle nut—the hardware used to secure a buffer tube assembly to the lower receiver on a carbine build. It's a common replacement when assembling a new lower or refreshing an existing one, and works alongside a receiver extension, buffer, and buffer spring. Because fitment varies between mil-spec and commercial components, confirm your buffer tube specification before installing. Proudly made in the USA.

Before ordering, verify your buffer tube is mil-spec rather than commercial diameter, have the correct staking or torque tools ready, and check whether your build also needs detent hardware. Builders stocking up can compare the mil-spec end plate five pack or a separate steel castle nut five pack.

For complete assemblies, see our build kits to round out the rest of your lower.