Denver Broncos star linebacker Von Miller was arrested Sunday at a gun club in Colorado ... but his arrest has NOTHING to do with firearms, TMZ has learned.
The 24-year-old All-Pro was trying to enter the Centennial Gun Store and Range just outside of Denver -- and submitted to a routine mandatory background check, as required by everyone looking to shoot at the range.
But the background check revealed a warrant out for Miller's arrest -- which was issued back in January after he failed to appear in court to face multiple traffic violations.
According to law enforcement, Miller had been charged with careless driving, driving without a license and having no proof of insurance back in October 2012.
Miller was taken into custody at the gun shop -- and was hauled to a nearby Sheriff's Dept. where he was booked ... and posed for a mug shot, obtained by TMZ.
Miller was eventually released on a $1,000 bond.
A rep for the Broncos says the team is aware of the arrest -- but didn't say if he will face disciplinary action from the team or the league.