Precisely machined out of 7075 aluminum, the PWS buffer tube delivers rock-solid connection of your buttstock to your lower receiver with the bonus of the innovative ratcheting castle nut system included. Available in both carbine and pistol models, the PWS enhanced buffer tube for sale features an extended carrier support lip for smooth cycling, six-position stock adjustment, innovative lightening cuts to reduce weight, and a fluted design that incorporates engraved position numbers and drain holes for clearing of debris. The PWS buffer tube MOD 2 includes the innovative ratcheting castle nut and QD endplate set, which locks the buffer tube on and keeps it tight no matter how much use your weapon gets. When your goal is to build the best AR possible, Primary Weapons Systems parts deliver the quality you need.