[NL400] AK vs squeeze, std ?

[13_Xerxes]

BB is 19/17/8, looks very aggro, probably from 2+2.
CO is a TAG.
I am a TAG, almost nit (19/16).

Of course, when I 4 bets this small (to induce shove), I am snap calling a push.

Standard ?

No-Limit Hold'em, $4 BB (6 handed) Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($549.50)
MP ($238.80)
CO ($425)
Button ($64)
SB ($651)
BB ($457.80)

Preflop: Hero is UTG with A[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">Hero raises to $12</font>, <font color="#666666">1 fold</font>, CO calls $12, <font color="#666666">2 folds</font>, <font color="#CC3333">BB raises to $56</font>, <font color="#CC3333">Hero raises to $140</font>, CO folds, <font color="#CC3333">BB raises to $457.8</font>