This submachine gun (sometimes referred to as Roham Puska - Sturmgewehr, also called 'Machine Carbine') was designed in 1937 and adopted for service by the Honvédség (Hungarian Army) on 8/12/1939. The weapon had a 500mm [19.7"] carbine-length barrel to increase accuracy. The design of this weapon, which is chambered for the 9mm Mauser CARTRIDGE, is credited to Danuvia's engineer, Pál D. Király and resembles in many respects that of the Swiss SIG MKMO and MKMS (shown on the left) submachine guns. Any resemblance to the Beretta M1938 is only skindeep. Previously Pál Király was an engineer at SIG and he was the co-designer of the MKMO. The folding magazine system of the Model 39 is similar to that of the SIG MKMO. The magazine, even when loaded, can be folded forward into a recess in the stock, where a plate then slides over it. The folded in magazine was liked by the troops, because enemy spotters could not differentiate between regular rifles and machine guns from the distance.
In 1940 1566 39.M's were ordered for the Police [Rendõrség] and Gendarmerie [Csendõrség], however the Honvédség liked it so much, that they withheld this first shipment for their own use. The gun functioned well under subzero conditions on the Russian front. The only complaint was the inconsistency of ammunition supply, because this was the only weapon on the front issued with the 9mm Mauser cartridge. A total amount of between 11.000-50.000 39Ms were produced.
The standard Model 39 submachine gun has a one-piece STOCK. A version with a folding wooden butt was produced for paratroopers as the Model 39/A (or 39/AM). These guns were supplied with a special carbine sling. 276 folding stock guns were delivered in 1940.