hi,
i don't have the hand its on another pc but its easy:

AK in the bb, villain CO 50 hands playing 30/20 approx.

raise->3bet from me->4bet from him is 3.1x

can i shove AKo here? effective stack size is 120bb
flat?

shove, and its not close, im also shoving AQ for value as long as his 3b stat is as out of line as his vpip/pfr

he 4beted though a big amount

Can you show me why this isn't close with some stove/math?

I mean I think , 50 hands on villain is to little. Our 3b in BB looks strong, so his
range is what AQ+,TT+ , I would'n consider any 4bet bluff in my experience they bluff less in rush, but I could be wrong. Are we flipping vs that range or do I give to much credit vs. villain

i think there is less 4bet bluffing going on in rush too, but i haven't played much

flat pre or dont fold when he 4bets.

villain is 30/20 so i assume he stealing wide range in late position, so when we 3bet preflop its strictly for value. with not much history / 4bet stats i am shuving here always b/c i expect to have fold equity / maybe get it in against worse occassionally. I expect someone whos stealing pretty wide to have a 4bet bluff range to protect themselves against agro blinds 3-bets that are common in todays games. agreed his 4B sizing is ******ed but i never fold here, jus take a note and own him next time if he has a huge bet sizing leak. often i find TAGfish 4B large asa total bluff cos there scared of getting called and playing a flop

also i think shuving AQ for value here is pretty bad with no 4-bet stats to base your decision on