Presma Aluminum Castle Nut for .223/5.56/.308 Buffer Tube Receiver End Plates Blue

Presma Aluminum Castle Nut for .223/5.56/.308 Buffer Tube Receiver End Plates Blue. This durable receiver end plate/buffer tube castle nut is machined from 7075 T6 aluminum for a strong lightweight platform. The machined receiver end plate/castle nut helps prevent any unwanted nipples from forming and is a crucial part of overall receiver installation. This receiver end plate/buffer tube castle nut should be installed at each end of the buffer tube instead of each individual end of the buffer tu