Only have 6 hands from villain he 3bet 1 hand and that was the only hand he played.
4bet or shove? (flatting an option?)

I assume that you only played 6 hands vs BTN, but should also should provide reads on CO imo.

Anyway, I think BTN can be squeezing here a hell of a lot, and flatting oop will probably create too many problems in the long run, so I think I'd just pull the trigger now.

@Teamtrousers 6 hands also on the other villain he raised 1 and flatted 1...

Do you shove or 4bet?

shove for sure. 4betting would leave you with a really awkward stack out of position.

call and see 3

The reasons behind?

Flatting is less variance line.
Good if you have an edge vs other players.

I like 4b/c to let them spazz w 99-JJ.

Shoving KK+/Ak would continue only, since we`re blocking QQ. It`s 60bb.

That his get it in range in that spot has to crush QQ, or at least QQ wont be doing great against it, put it that way.

If you call he wont be able to put u in such a big hand and u can play postflop with ease, take a passive line and call down a couple streets, and soulread river if he fires a 3rd barrel. But it won't happen that often light deep in an mtt

edit: obv dependent on texture, if he double barrels aec hi i think i give up earlier

Indeed it's a pretty tough spot, specially when u have no read on your opponents. Depending on how active you have been, you could open pretty light here. And after a relatively weak flat call from MP3 it's a very nice spot to re-steal from the BTN, specially with the chiplead. And if he thinks you are aware of ICM (and shouldn't come over the top, light OOP) he can do that 3-bet with a relatively wide range. The fact that he made a 5x raise tells me he has some sort of strong hand, but vulnerable (maybe 88-JJ, AJs-AKo, KQs)
So I think you still have his (and MP3's) range crushed and you should go on by jammin. Me too think, you would loose value by flating OOP in the long. (against this particl. big 3bet and giving MP3 pretty good odds to call too or reshove himself)
A common 4bet here would be to 450-600K, leaving you with less then a psb behind if he calls. If the BTN would just made it about 150-180K I would opt to 4bet/f to about 350-400K, because after obvs. commiting yourself (or shoving) he could basically only continue with KK+.
Of course sometimes he tables AA, KK. But I think in the long run you will collect a very nice pot PF and overtaking the chiplead (and of course this action will prevent him or others to play back at you light any more)

But it's just my opinion. I'm interested in how others would play this spot.

Stacks suck for 4b anything other than all-in

I just put it in.

Id CIB if he made it smaller or if there was more of a dynamic but with only 6 hands id just jam.