Im starting a build for my son and he got a box of AK parts and barrels and stuff for Xmas. it will be a 243 0r 260 remington loaded to light pressure.
Its going to be a light weight sporter and I want it as light as i can make it besides the heavy m70 trunion. this will be a outside the box build over the next year were he helps build it. He is 9 and will be able to shoot deer next season. I plan on letting him do as much on it as he can including some of the machine work that way he will know whats going on and how it all works and get some Shop time with Dad. It will have gas shut off as well and he will be shooting this as a non semi auto at first. Baby steps here.
Hes pretty sharp and noticed I had three barrels in the box, a 243, Win 260 Remington and 308 WIn there all model 700 take offs. he asked why there were three barels and I told him we were only going to use one but I hadent decided what one and that id keep the other two. Well hes not one to give stuff back that he just got, so he says way not use them all and just change them.
I have thought of several differant switch barrel assembly set up's in the past but they all required seperate trunions on a screw build. So got to thinking about a threaded barrel set up.
it looks like a 1"-12 thread can be used on the 23mm trunion if the bore is opend up to .9219"
that is .016 more than the factory bore. thats not much metal to get things right with with the boring bar if it dont cut good on the first try. the Yugo bore is not interupted like other trunions were there are hollow spots between the barrel and the trunion. aside from the barrel pin there is no interuptions. I really wish I had a virgin trunion to work with. the RSB will need to be removable or able to slide forward or you will not be able to unscrew the barrel. I was thinking of useing a barrel nut like the savage bolt actions and all barrels will need to be timed but that should not be a issue as once there head spaced correctly they will always be reinstalled in the same place every time.
I have seen were a guy threaded a 410 Saiga in conversion to a 500 S&W so I know it can be done. I think the model 70 Win uses a 1" thread .
this build is going to have a custom Aluminum RSB and likely a GB so I a dont have to worry about traditional looks in fact the less it looks like a AK the better for this build. people get nervious with kids shooting AK,s for some reason LOL.
I was even thinking with a differant bolt I could even do a 410 SG barrel for it.