Sako M23

[2] The M23 is based on the AR-10 and AR-15 design by Eugene Stoner[2] but features an AR-18 short-stroke gas piston system,[4] similar to Heckler & Koch HK416, SIG MCX Spear, CZ 805 BREN, FN SCAR and other modern assault rifles.

[8] As of March 2023, the Swedish Defence Materiel Administration intends to buy the M23 in both 5.56 and 7.62 variants of different barrel lengths, as part of a larger project to replace their current small arms inventory.

The Sako M23 is based on the American AR-10 and AR-15 (originally designed by Eugene Stoner), with a proprietary self-regulating short stroke gas piston.

[2][10] As displayed in the announcement of the adoption of the rifle system by the Finnish Defence Forces, and confirmed by Major Mika Mäenpää, the rifle features a telescoping Magpul CTR stock,[11] green ceramic surface treatment, ambidextrous controls, has a full length NATO Accessory Rail (STANAG 4694) on top of the receiver and handguard for sights and M-LOK rail on the handguard for various accessories.

[4] The Finnish Defence Forces also has signed a letter of intent with Nammo Lapua Oy for developning a domestically produced 7.62 cartridge for the Sako M23, the MG 3 and FN MAG which FDF uses.