Z-M Weapons LR 300 Rifles

[Scocou]

The little ZM 300 Carbine with the underslung launcher platform on it always made me smile.

Me too!

Because of the way it's designed to be disassembled to expose the piston, I've always wondered about the ability of that top rail to hold a zero.

Interesting... I for one would be happy for the chance to confirm or disprove your suspicion. On another note, I didn't think this rifle used a piston, but a modified DI w/op-rod. Maybe I misunderstood...