Today a new acquisition of submachine guns by the Spanish Navy has become known, specifically the Sig Sauer MCX model.
The State Contracting Platform has published this morning the announcement of a contract for the purchase of 20 weapons of that model. The contract, for an amount of 223,997.57 euros, has been awarded to Viator Plus Ultra, a Spanish company based in Viator (Almería) and that sells weapons from the German firm Sig Sauer.
The contract, awarded by the Economic Management Directorate of the Navy's Logistics Support Headquarters, does not indicate which variant of the Sig Sauer MCX has been purchased, but everything indicates that it will be the MCX Rattle, since the document speaks of "submachine guns." In November 2022, the Civil Guard became the first Spanish user of this submachine gun, with the purchase of 15 SIG Sauer MCX Rattler caliber .300 BLK (7.62x35 mm), also through the aforementioned distribution company, surely to equip the Special Intervention Unit (UEI).
Everything indicates that these 20 MCX submachine guns will end up the Special Naval Warfare Force (FGNE), the special operations unit of the Spanish Navy, a unit dependent on the General Command of the Marine Corps and based at the Algameca Naval Station, in Cartagena (Murcia). Currently, the FGNE already uses Heckler & Koch HK416 and HK417 assault rifles. Surely, the MCX Rattle will serve to replace the already veteran Heckler & Koch MP-5 submachine guns used by that unit.
The Sig Sauer MCX Rattler was designed as a personal defense weapon (PDW). It has a 140 mm barrel and is available in both the aforementioned .300 BLK (7.62x35 mm) and 5 calibers. .56x45 mm NATO. It has a folding stock and takes up little space, and can be transported in a suitcase. The MCX Rattler belongs to the same family of weapons as the Sig Sauer MCX Spear , the new rifle of the US Army, designated as XM-5 in and with SIG 6.8x51 FURY caliber.
In May 2022 the MCX Rattle won a US Joint Special Operations Command (SOCOM) competition to supply personal defense weapons to its units, including the famous Navy and Force SEALs US Army Delta. The submachine guns supplied include variants with 5.56x45 mm and .300 BLK caliber, and also have SLX762C-QD suppressors.
The MCX Rattle has a short-stroke gas piston system with a multi-position adjustable gas block (you can see it on these lines), a mechanism that makes the weapon lighter, easier to maintain and less prone to dirt. The weapon is equipped with an M-LOK type handguard and has ambidextrous controls. It has folding mechanical sights and a Picatinny rail on the top to apply various types of sights. It has 30-round magazines and has two rates of fire (semi-automatic and automatic). Its weight is 2.5 kg (the .300 BLK version) and 2.63 kg (the 5.56 version). Its length with the stock extended is 584 mm (the .300 BLK version) and 603 mm (the 5.56).
You can see here the spectacular advertisement with which Sig Sauer unveiled this submachine gun six years ago:
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