Police - Contract over 200 rifles with accessories (version HK437 in .300 Blackout) In popular culture The weapon is featured in Call of Duty: Modern Warfare and throughout the franchise as the Kilo 141. References External links Heckler & Koch: Product Overview - HK433 H&K HK433 at SHOT Show 2017 Heckler & Koch HK433 modular assault rifle 5.56 mm assault rifles 5.56×45mm NATO assault rifles Short stroke piston firearms Heckler & Koch rifles Post–Cold War weapons of Germany