[mamelukesabre]

It would have to be about the size of a standard N frame smith and wesson. The N frame holds 8 rounds of .357 caliber ammo, or 6 rounds of 45 caliber ammo. 30 caliber is even smaller than 357 so you should be able to get at least 9 rounds of 30 into an N frame. I’d have to draw a true scale picture of the 30 caliber holes arranged circularly in a cylinder to prove it, but I bet 10 of them would fit in a standard N frame cylinder. If not then just go up to the X frame size cylinder.

My brainstorm was a cattleman carbine version of the mateba with a ten round cylinder shooting 30 carbine. Not sure how well it would work though since the barrel has to recoil along with the cylinder. Maybe the barrel would have to be fairly short to keep the weight down, like say a 12 incher.

Also, it would be cool if mateba could incorporate the Nagant gas seal mechanism into their design.

[Shooter 2.5]

Ok, have you any idea exactly how big that thing already is?

And you want to add a Nagant system?

Fuzzy dice hanging from the muzzle?