Myself & another Gunco member (Nicoroshi) have been working this summer on a new instructional AK building ebook; particularly as the some new laws here in California may make things very dicey for the hobby. It has just released at Amazon:
BUILD YOUR OWN AK (Kindle version)
Vol. I - Headspacing & Virgin Barrel Population
NOOK (Barnes & Noble)
It covers all the needed steps for prepping a new virgin barrel and populating it with rear sight/gasblock/front sight on both a AK-47 and AK-74. Setting correct headspacing is also detailed.
No Kindle, just get the Free Kindle Reader app here first. Works on iPad/iPhone/Android/PC/MACs.
Comments / reviews are very welcome as we want to make this the best info source possible, and the ebook can be updated easily/frequently. Currently out just for the Kindle, but can be used on a iPad/iPhone/home pc etc. iTunes/ Nook versions will be out early next year, along with Vol. 2 that will cover a full flat build beginning to end.
Special thanks to some members here for their help/advice. I'm sending you guys out your free copies later today.