I looked at the wrong thing. They spent $22.6 million with 99% of it in support of the GOP. The full breakdown is here:
https://www.opensecrets.org/pacs/expenditures.php?cycle=2016&cmte=C00053553
About $17 million was on political ads, and another $2 million was on mailed out materials. Here’s the beakdown by candidate for that media:
https://www.opensecrets.org/pacs/indexpend.php?cycle=2016&cmte=C00053553
The other associated ad spending for the $52.6 million total is from the other NRA 501c which is the $35 million.
https://www.opensecrets.org/outsidespending/recips.php?cmte=C90013301&cycle=2016
$12.3 million of it was spent against HRC alone.
EDIT
And if you expand to outside the NRA alone, here is (most of) the money the gun lobbying industry donated to candidates in 2016:
And here is the total spent on gun controll:
