Like it says. How much longer is the extend 9mm buffer that I have noticed a few companies selling?
I don't have an actual 9mm buffer in my SBR AR yet I have been running a carbine buffer that I gutted and poured full of melted lead to bring up the weight to 4.Oz.
I have been wanting to turn a solid stainless buffer but if I'm going to build one I might as well make it the extended length right :)