I am looking for a yugo M70AB2 fixed stock lower reciver and trunion for M4 stock. i Have a underfolder and now want to change it into a magpul ctr. anyone have an idea of where i can find the trunion and mount as well as the lower

Do you realize how much work that is going to take?



You would have to completely rework the rear of the rifle over to a fixed stock configuration.  A lot of work and it's going to be expensive if you can't do it yourself.



You'd be way ahead to sell the AB2 and find a fixed stock B1 and then install a PWS adapter, ACE M4 stock (with or without folding mechanism), and then add the CTR.

That would be an undertaking of undertakings.  +1 on Liquidmetal's comments.