In X-Men: Apocalypse, after the X-Mansion (Xavier’s School for Gifted Youngsters) was incinerated by a blast and (almost) everyone was saved by Quiksilver, General Stryker arrives with his team and seizes the opportunity to capture Mystique and a few other mutants.
He did so by first knocking every mutant unconscious, and he does so by using something that originated from either the helicopter and/or the big gun-like things held by his soldiers.
Question: What is the device or technology on the helicopter and/or guns that he uses to knock down all the mutants, and how did it only manage to knock everyone, but leave Jean Grey, NightCrawler and Cyclops unaffected when they were in virtually the same space as the others?