Which would lead me to beleive that the billet guide was not rvited in correct shape to the new receiver [or likewise, the new receiver was not fitted correctly to the billet guide]. Thus, one "size" mag would be "in spec" adn nother would be "out fo spec". Who did your build? HTH~
damn....
you just reinforced my theory. a local shop built it for me.
i had a few problems when it was first built.
the main problem was he used a 7.62 reciever, then he tried to tell me they were the same, when i knew the ejctors were different.
so he built up the 7.62 ejector to eject 5.45.
oh well, prolly not much i can do but use the bakelite mags.
it's a pity too, this bulgy is a fantastic shooter.