The one to rule them all - Geissele Premium Mil-Spec Buffer Tube Assembly With Super 42, H1

The spring, buffer, and tube are a fantastic build quality and is noticeable better and smoother over a stock mil spec spring. The buffer is nicely finished and the buffer tube is also nicely finished with tight tolerances with all the parts in the kit are far better then a standard mil spec kit. I would recommend to anyone who wants a quality build