[Brocktoon]

You have just picked up a nutshot. Your hand will also be very well disguised if you hit it and potentially be very valuable.

There are 2 players who you suspect may be slowplaying and who have already checked the turn, one was the preflop raiser making his checks even more conspicuous. The only player between you and a free river is a conservative player who seems to be out of his comfot zone and will not be taking stabs into 5-way pots with A-high boards.

Checking seems to be the OBVIOUS play here because there is no reason to allow yourself to be raised out of the hand by one of the checkers when a river could get you their stacks. Your implied odds here seem to outweigh any potential bluff EV by orders of magnitude.

Bluffing into this many players after the A hits seems unlikely to succeed and it may wind up with you having to fold before the river which could be disaterous, particularly if someone actually is slowplaying a big hand. IMO you should be more than happy to see a river for free with your 4 outs.

RIVER PLEASE...