I want to know how in scale these items are to Busou Shinki, figma, Revoltech, S.H. Figarts, SIC, Marvel, Halo 3 and other relating figures of. Any assistance is appreciated. Thank you.

http://www.hlj.com/product/YLS20014
http://www.hlj.com/product/YLS20015
http://www.hlj.com/product/YLS20018
http://www.hlj.com/product/YLS20019

Shinkis/Figma are about 1/12 scale, so 1/6 items will be 2x as big as they should be.. I'm not sure about the scaling on the others.

SIC is about 1/10. Figuart are all about Shinki size, so about 1/12.

Alrighty. So basically HUGE. Thanks, I was thinking about getting them if they were in scale, but as numbers in terms of scale and such to me is just... beyond me. Anyway, again thank you.

They may not be in scale for the Busous (they are designed with DML and the like in mind) but they are pretty good looking sets. I have a couple of different ones, and in particular the broomhandled Mauser is amazing.

if you want to get pedantic about it Shinkis are 1:1 so they are in scale to reality.
but if you want a ready supply of props and guns you could tray any regular action figure off the shelf

I should consider myself lucky. I have 1/6 scale weapons I was going to use on a lego mecha project that never made it off the ground.