I've searched for DIYbut the only thing im coming up with is the Ingalls instruction. I don't see how weapon r might be the same as it so does anyone have any tips and advices on how i could install it right?

 

I don't believe that there is a DIY out for the weapon-r. Plus, I don't think there are many people on the board who went with the weapon-r over the ingalls, so you're not going to find much help for that EXACT product. I would just read through the ingalls diy and use your mind for the rest. Its really not that hard of an install - you'll figure it out.