Source: @rukalee on X™.
It is probably a bad idea to leave a poor tip at the local maid café when the wait staff have access to firearms. This “meido” (メイド) is sighting in on a cheap customer with a 6mm airsoft version of the SIG Sauer MCX-Rattler chambered for the .300 AAC Blackout (300 BLK) cartridge. There are several airsoft manufacturers of the MCX-Rattler to include Cybergun, PROW, and Salvo Precision. This particular airsoft is a custom build as it is using a SIG Air low-profile retractable stock along with a dummy suppressor styled after SIG Sauer's SRD762 series suppressor. The frame hardware is also custom as it features a foregrip which the real MCX-Rattler doesn't come with as standard. Her weapon is using a Unity high-profile, fast micro-mount upon which is an Aimpoint T2 micro red dot sight.
As for the actual MCX-Rattler, the model shown is the pistol version that uses a 5.5” barrel. The barrel is made of cold hammer forged steel while the forend uses metal alloy to keep weight down. Empty, the weapon has a weight of 5.1 pounds and a overall length of 1.9 feet. The civilian version is semi-automatic and uses a gas-operated, short-stroke piston action. The gas system is adjustable. The trigger is a flat, SIG blade match style while a top Picatinny rail is standard. The weapon is fed using a 30-round box magazine.
The .300 AAC Blackout round, produced by the Advanced Armament Corporation (AAC), has a caliber of 7.62x35mm and can be used in any 5.56mm NATO compatible box magazine. The cartridge is designed as a intermediate round that falls between the standard 5.56x45mm round and the 9x19mm Parabellum pistol round. Its primary use is in shorter barreled weapons (such as the M4 Carbine) where it delivers improved muzzle velocity similar to the Russian 7.62x39mm round and while the 300 BLK round's accuracy drops off faster than the 5.56mm cartridge, the 300 BLK has the same energy at 700 meters as the 5.56mm round does at 500 meters. The 300 BLK subsonic round variant permits usage of silencers and suppressors. Out of a 9 inch barrel, the effective range of the 300 BLK cartridge is 440 meters with a muzzle velocity of 2,050 feet per second.
Since 2022, the U.S. Special Operations Command (USSOCOM) has utilized the SIG Sauer MCX Rattler chambered for both 5.56mm and 300 BLK as PDWs (Personal Defense Weapons). Other countries that utilize the 300 BLK cartridge include the Netherlands (used by the Dutch Maritime Special Operations Force), Germany (by the Schleswig-Holstein state police and the Kommando Spezialkräfte [Special Forces Command]), and the United Kingdom.
