StG M90
| Sturmgevär Modell 90 | |
|---|---|
 A modernised StG M90KA4 | |
| Type | Assault Rifle |
| Place of origin |  Acrea |
| Service history | |
| In service | 1984 - Present |
| Used by | See Users |
| Production history | |
| Designer | Stuhr Arsenalen AB |
| Designed | 1975-1984 |
| 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 1985, the M90 was considered advanced for its time due to its use of primarily polymer construction and omission of primary iron sights in favour of the use of optical sights. In addition, the rifle has become known for its light weight, reliability, ease of maintenance, and modularity. It has continuously upgraded since its adoption. The M90 was never pressed into service as Acrea's standard service rifle, with the StG M81 instead supplementing the M51 in service, with its derivatives eventually becoming Acrea's standard service rifles in the form of the StG M8 and StG M6.
In addition to adoption by the Acrean Army, the M90 has seen widespread use among law enforcement agencies in Acrea and abroad.