I'm intrigued by the keltec PMR30, and was wondering if anyone has ever made anything similar (20+ rds) in 22lr. What would be the constraint - reliability (feeding?)
A .22MAG is easier to stack than .22LR without curving.
You can "almost" stack .22 MAG straight up and down while .22 LR will curve like a bananna.
This is why George Kellgren was able to make the P30 Grendel and now the PMR-30.
Hopefully the PMR doesn't flop like the P30 did.
Shortly after they were introduced, Clinton banned so-called "high capacity" magazines. Didn't help. Far less novelty when the mag is limited to 10 rnds.