I know that's what you'd think, but I done this mod on several including TAPCO's with plastic followers and no rounded followers yet with dozens of lock ups. As long as you got a double stack bolt with a nice wide and deep face it mates way down on the follower nub. A besides, locking only half back it's not hitting with the force as full forward with the lack of momentum.
I couldn't tell ya one a Pmag, never owned one. The TAPCO's work killer cause the rear of the nub's nice big and square and extends all the way to the rear of the follower, lots of bearing surface. And on mine, even after many, many, many lock-ups, they're not even scratched. But my first convert, a steel Romanian, that I hastily squared the rear of it's tiny little hollow nub, free hand with a die grinder, is still going strong after hundreds of lock-ups, though it's not pretty lol. Since it's hollow the first couple of hits of the bolt face hammered its own nice little seat, but it hasn't budged since. It's pretty neat...it's like it was always there, but it took the Serbs to discover it lol. It would be real cool if you just happened to have cut your notch forward enough to synch with it, that's where it's at. I'm gonna get a surplus safety and try it out. Heck if it's too weak out there and snaps off, it's not like ya can't shoot the thing till ya pick up another one. Have to rely on your secondary safeties, brain and trigger finger lol.
