H&K HK433.

The HK433 was designed by Heckler & Koch to be familiar to operators with experience using the H&K G36 and HK416 platforms. All controls are ambidextrous, and major components are modular, allowing for rifles to be configured in the field as needed. Available barrel lengths will be from 11 “, 12.5”, 14.5 “, 16.5”, 18.9” up to 20”, cold hammer forged and hard chrome lined with a 178 mm (1 in 7 inch) right-hand twist, six-groove barrels with hard chromium plating. Modular and light design. Compact dimensions. Barrel length individually configurable. Easy barrel exchange at the operators or maintenance level. Fully ambidextrous weapon operation for both right-handed and left-handed shooters. Non-reciprocating charging handle, convertible from left to right without tools. Special material properties and surface treatments allow for a reliable and low-maintenance system suitable for the most extreme conditions. Lower receiver with double-sided operating concept for G36 or HK416/AR-15 users. Drop safety as per AC225/D14 when on or off safety. Monolithic upper receiver with STANAG 4694 profile at 12 o’clock position. Modular Slim Line handguard with HKey interfaces on 3 and 9 o’clock positions as well as Picatinny rail as per MIL-STD 1913 on 6 o’clock position. Maintenance-free round counter integrated in receiver, no energy supply required. Foldable, retractable buttstock with height-adjustable cheek rest. Weapon can also be used with the buttstock in the folded-in position. Tool-free assembly/disassembly of the main assemblies. Cocking in all safety positions possible. Wide variety of accessories available, such as training bolt group, bayonet, suppressor, drum magazine, brass catcher, blank firing attachment, forward grip or bipod. Infrared-absorbing coatings possible.