StG M90
| Sturmgevär Modell 90 | |
|---|---|
 A modernised StG M90KA5 | |
| Type | Assault Rifle |
| Place of origin |  Acrea |
| Service history | |
| In service | 1983 - Present |
| Used by | See Users |
| Production history | |
| Designer | Stuhr Arsenalen GmbH |
| Designed | 1972-1983 |
| Manufacturer | Stuhr Arsenal |
| Specifications | |
| Cartridge | 5.56x45mm ACR |
| Action | Rotating bolt, short-stroke gas-operated piston |
| Rate of fire | 750 rounds per minute |
The StG M90, officially the Sturmgevär/Sturmgewehr Modell 90, is an Acrean 5.56x45mm select-fire rifle designed by the Stuhr arsenal for the Acrean Armed Forces. It was designed in the 1970s as a replacement for the StG M51, using a lighter intermediate cartridge. Entering service in 1983, the M90 was considered advanced for its time due to its use of primarily polymer construction and omission of iron sights in favour of the sole use of optical sights. In addition, the rifle has become known for its light weight, reliability, ease of maintenance, and modularity.
In addition to adoption by the Acrean Army, the M90 has seen widespread use among law enforcement agencies in Acrea and abroad. It is currently supplemented by the StG M6 in Acrean service, which has already replaced it fully in numerous divisions and and is expected to fully replace the M90 in frontline service by 2026.