Rep. Dan Crenshaw (R-TX) posted a lengthy infomercial diatribe on X Friday evening, promoting “Endex Fitness” brand concealed carry holsters for guns. This follows some other controversial product plugs by Republican lawmakers, including Gov. Kristi Noem (R-SD) promoting a Texas dental practice that fixed her teeth — which actually led to her facing a false advertising lawsuit. “No better way to celebrate Independence Day than stylishly exercising your 2nd Amendment rights,” wrote Crenshaw, accompanying the post with a video demonstrating the holster. “So many brands try to sell you ‘sleek’ ho…