FBI Director Christopher Wray revealed on Wednesday that the weapon used by the shooter at the Trump rally, Thomas Matthew Crooks, had a collapsible stock. Wray pointed out that the collapsible stock could have made it less noticeable to people, potentially explaining why it was not observed by many before the attack.
Wray highlighted that the first sightings of Crooks with the weapon were when he was already on the roof. He mentioned that there have been no reports of anyone witnessing Crooks walking around with the weapon before the incident.