Aimpoint has Comp M5 which uses AA battery.
HK 433 is still in development and things may change but here is the gun itself.
SMGLee has some close up photos
https://www.instagram.com/p/BeWpqZGjzLK/
Chris Bartocci covers Beretta ARX 200, one piece bolt carrier group from LWRCi(10:20)
From: Vickers Tactical, Chris Bartocci
