There are a few kinds of buffers that Ive looked at for my saiga 7.62x39. Ive seen Wilson combat, black jack, one thats called 'power custom ak buffer?' and buffer technologies. The wilson combat and buffer tech. is $15 and the other two are $10. Also should I go with the more expensive c-clamp sight tool(which is $15) or a is the $10 one sufficient?