
Kid Rock is all fired up amid Bud Light's decision to partner up with a transgender activist -- and we mean that literally -- 'cause he's out firing bullets over the whole thing.
The singer/rapper posted a video to his social media Monday, which was uncaptioned ... but was also self-explanatory in what was shown. Namely, it's him grabbing an AR-style rifle of some sort and firing a ton of bullets at a few cases of Bud Light off in the distance.
He starts his video by saying, "grandpa's feeling a little frisky today," and then proceeds to shoot up the beer ... which he had teed up for him on a table near a lake.

Finally, he hits his point home by once again talking to the camera ... this time saying, "F*** Bud Light and f*** Anheuser-Busch. Have a terrific day."
Now, if you're wondering why KR is all pissy about Bud Light ... it's no secret if you've been following the news lately. Dylan Mulvaney -- who's a transgender woman and a social media influencer who's been documenting her transition journey online -- has partnered with BL.
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