I assume he had two guns: the long gun (assault rifle) described by the witness in the parking lot, and this handgun, described by the man ( Boubonnais) who put down his hamburger to see what was going on (and was HE ever surprised!)
Investigators will have it all sorted out soon, including which gun he used at the YWAM mission house.
On KKTV earlier today (Colo Sprs TV station), they managed to get a reporter up to the front door very quickly, before the cops had a chance to clear all the reporters well away from the church. And she had a really short interview, that was interrupted by the cops, with a man who had been wounded in his left arm with what he was fairly certain were shotgun pellets. Of course, it could have been ricocheting plaster or concrete, right? Anyway, he was planning to go seek medical treatment eventually, to get the pieces removed, but didn't seem in a hurry to leave. He didn't consider it a very serious wound. (Unless you leave them in longterm!)