B&T APC9 pistol. Flip up iron sights, tri-lug barrel and telescoping brace. All ambidextrous controls. 

"In 2011, B&T began work on a modernized H&K MP5 replacement, for while the MP5 has enjoyed a tremendous legacy, the platform is simply no longer compatible with the modern needs of its end users. Those needs include an updated manual of arms, improved shooter ergonomics, the ability to accept mission-critical electro-optics and, most importantly, modularity." - B&T