Youth gun

[HANDGUNNER]

What are your opinions on youth guns. My son is eleven and has two single shots, on old hand me down .410 and a H&R 20 guage. I'm want to upgrade his 20 guage to a pump and I'm looking at the Mossberg, Win, and Rem 870. I want to be able to put a red dot sight on it for Turkey and Deer. I'm going with a pump because the lightweight H&R is brutal with the heavy loads and I can't mount a red dot on it. I've been a Rem & Browing man, but I've heard good things about the Mossbergs.