I want to change my PWA Commando AR-15s fixed stock (M-16 standard style). I really know nothing about rifles as this is my first. I have been watching a lot of videos and from what I have gathered I will need a new buffer, buffer tube, spring, nut, receiver end plate and stock; would it be better to buy a complete kit like this http://www.brownells.com/rifle-part...carbine-buttstock-mounting-kit-prod27068.aspx I would like a Magpul stock like this http://www.brownells.com/rifle-part...stocks/ar-15-m16-moe-buttstock-prod26706.aspx Like I said, this is all NEW to me. I know I need some tools and a book might not be a bad idea either. My rifle is .223/.556. What do you all recommend?