#Ausa17

DefenceWeb recently released a video overview of the new Steyr / Rheinmetall RS-556 assault rifle. The rifle, a sort of hybrid between an AR-15 and a Steyr AUG, was submitted to the Bundeswehr’s System Sturmgewehr Bundeswehr trials, competing against both Heckler & Koch’s HK416 and the new HK433 assault rifles. The RS-556, mechanically, is substantially different from a basic AR-15, and therefore occupies an interesting spot in-between being an AR-15 variant and a completely different weapon. The upper receiver is a single piece forged unit, with an AUG-style fixed extension/trunnion and quick change barrel. An AUG-style short stroke tappet gas system and connecting operating rod replace the AR-15’s direct impingement system. In the upper, a steel insert, rather than the aluminum receiver itself, guides the bolt carrier group. This feature is supposed to increase upper receiver life, and improve its maintenance characteristics, although it does make the rifle significantly heavier.

It is easy to forget, what with all the hubbub about SIG’s selection for M17, Glock’s protest, and SIG’s subsequent recall, that the M17 program was intended to procure a “total system package”, not just a handgun. This meant, besides the handgun, ammunition, magazines, spares, accessories, holsters, and eventually optics and suppressors as well. While much ink has been spilt, and many glam photos taken of the XM17 and M17 MHS handguns themselves, we have not yet seen or heard very much about the ammunition it is intended to fire. From second-place finisher Glock, we have already seen the Federal-engineered Enhanced Barrier Ammunition. Partnered with SIG for the competition was ammunition heavyweight Winchester/Olin, and so it was reasonable to expect their entry to be something based on Winchester’s existing product line. At the 2017 Association of the United States Army annual meeting, that expectation was confirmed:

Representatives of the German gun manufacturing company Heckler & Koch confirmed today that the company has submitted both the HK416 assault rifle and the new HK433 modular assault rifle to the Bundeswehr’s System Sturmgewehr Bundeswehr (SSB) rifle trials,  which are scheduled to be completed by the end of 2018.

At the 2017 Association of the United States Army annual meeting, Heckler & Koch brought out a weapon much talked-about but not seen on a US show floor until now: The HK433 rifle. Designed on the heels of the G36 controversy and intended to add a modern, inexpensive modular rifle to the Heckler & Koch lineup, the HK433 melds the features of the HK416 and G36 together into a single platform. From the G36, it takes its basic operating mechanism, polymer lower receiver, and basic disassembly procedure, while from the HK416, it takes the AR-15-compatible magwell, barrel design, aluminum receiver construction, and AR-15 fire control group.