I started my 20" flattop build

[Big Frank]

The only pump I ever owned was a Mossberg 500 Bullpup and I didn't like it. I've always been a fan of semi-autos. 19+1 rounds of buckshot in this gun should intimidate anyone who's close enough to see it, and who knows what it is. But the 12-round mags are easier to handle than the 19s. The 7-round and 12-round mags are easier to carry in pouches on a belt too. I have 3 of each size mag and 6 mag pouches, so I can carry all 3 7s and all 3 12s while there's a 19-round mag in the gun. And I can toss it on the ground when I reload, instead of trying to put it in a mag pouch where it sticks out in the way.