The MSAR STG-556 was a American bullpup semi-automatic rifle designed by Tony Marfione and produced by Microtech Small Arms Research from 2007 to 2015.
History[]
First revealed at the 2007 SHOT Show, the STG-556 was manufactured by a subsidiary of Microtech Knives, Microtech Small Arms Research. Production was discontinued in 2015 due to the closure of Microtech Small Arms Research, with founders Tony and Susan Marfione opting to focus more on their line of knives.
Design Details[]
Despite being regarded as a Steyr AUG A1 clone, the STG-556 is not truly a clone of the AUG due to some differences. One notable difference is that the STG-556 has the bolt release mechanism from an AR-15 located on the left side of the rifle. Another difference with older versions of the STG-556 is that its magazines are not STANAG-compliant; instead, it uses proprietary clear-sided magazines that resemble the ones used by the AUG. However, later versions of the STG-556 are able to accept STANAG magazines.
Variants[]
- STG-556 Limited Edition
Limited edition run of the STG-556; this version is very much like the standard STG-556, except that it uses a Steyr AUG A3 body. 1000 weapons were made, all finished in black. 232 more were made with a 18.5 in (47 cm) barrel after it was discovered that the 18 inch barrel had better barrel harmonics than the standard full-length 24 in (61 cm) barrel.
- STG-556 Gebirgsjäger
Limited edition run of the STG-556; this version is the exact same as the STG-556 Limited Edition except that all weapons had a drab green finish. 500 produced.