Yeah... no. This Pew poll doesn't say what the pro-gunners think it says.
They weren't conducting a poll on gun ownership rates.They were polling for opinions about guns, and the pro-gun press are misinterpreting the number of guns owned by people in the survey, with a claim about gun ownership rates for the public as a whole.
There are several different national polls on gun ownership rates. CBS/NYT shows constant drops, now at 36%; Gallup had 43% last October, also a drop from the 70s; GSS also showed declines since the 1970s, and is done on even years, and isn't published yet for 2016. (Pew's own writeups on gun ownership discuss both Gallup and GSS.)
Pew has done its own polling on gun ownership, but I don't see anything more recent than 2013, and closely followed GSS figures anyway. If their surveys showed a 10% increase in household gun ownership in the past 3 years, that would be front-page news. Pew is non-partisan, and has no interest in burying the lede like that.
Meanwhile, Pew's poll does very high support for universal background checks, creating a federal database to track gun sales, and barring purchases by people on the federal no-fly list. I wonder why
those findings are getting ignored by the pro-gun press...?