PSA pistol buffer tube

[gimmejr]

Am I going to have to purchase a castle nut separately because I don't see one in the pic of included parts?

http://palmettostatearmory.com/index.php/catalog/product/view/id/16933/

[gimmejr]

Actually have just watched two different vids, one brand that used a castle nut and one that didn't.

[uglyduckling]

It doesn't need one.