^^ Sig also has .22lr conversions, for a good price.
Muzzle flip is related to the height of the barrel conpared to your hand, a Sig has a higher barrel compareg to a glock, Glocks have less muzzle flip than Sigs. It may not be easy to see, because people think weight makes how the muzze moves, but it's the height relation of the barrel to the frame/hand that decides if muzzle flip is more pronounced or not.
People don't hold the gun the same way one to another, so it is another variation to think about, weak hands will make for a more pronounced muzzle flip, and strong hands and wrists will make for a very low visible muzzle flip and overall gun movement.