An ar-15 castle nut locks the buffer tube end plate in place on your AR-15 lower receiver. It threads onto the buffer tube and holds everything tight so your stock stays secure during use.

Daytona Tactical carries ar-15 castle nut options from top brands at fair prices. We stock standard and enhanced styles to fit most AR-15 builds.

Shop Daytona Tactical for all the small parts you need to finish your AR-15 build. Our team helps you find the right parts fast.