They're collecting them to turn in en mass. They're putting them in places Republican voters are more likely to already be going to make it easier for Republicans to vote.
This is arguably legal under California's ballot harvesting law.
This is arguably legal under California's ballot harvesting law.
What guarantees do you have that a random gun store is going to deliver your vote to the proper authorities?
How can you be sure that all of the people using these boxes know they are handing their ballots to someone not involved in the election at all?
If one was a little more motivated, one could also get FEC donation records and also purge GOP voters whose donation history in the current cycle indicate that they were likely to vote out of line with the party endorsements.