![m39 stock crack top m39 stock crack top](https://gun.deals/sites/default/files/89c5228f3a9d5401797cfd4bd235be68_0.jpg)
The secondary propulsion system would be very useful on planets with thicker atmosphere since the bullet would be able to compensate for resistance. This gives the M39 a very distinctive sound, even the impression that it fires in two-round bursts. The secondary discharge creates a crack just like the bullet does when it initially leaves the barrel, but the secondary explosion happens so quickly that it creates a cra-crack sound with one sound overlapping the other. Users can use modified bullets (what other models would consider 'stock') that would be subsonic and thus suppressable, but it would very much diminish the gun's range.
![m39 stock crack top m39 stock crack top](https://s3.amazonaws.com/mgm-content/sites/armslist/uploads/posts/2020/02/25/11248430_04_finnish_mosin_nagant_m39_origi_640.jpg)
![m39 stock crack top m39 stock crack top](https://s3.amazonaws.com/mgm-content/sites/armslist/uploads/posts/2018/01/01/7773370_01_finnish_m39_640.jpg)
Because of this, the stock M-39 could never be suppressed because it produced a second supersonic crack after the bullet leaves the barrel. The M39 also had something that the MK-6A didn't have - a secondary igniter.Īfter leaving the barrel, the bullet would recieve an additional push from another explosion which would add even more velocity to the bullet which was located at the hind end of the round, pushing it to nearly twice the speed of sound, at over six hundred meters per second. While the MK-6A was capable of hitting targets harder, it didn't have the punch. The M39 was developed to hit targets at range farther than that of regular service pistols. The Model 39 Pistol was a gas-operated semi-automatic pistol that fired an 11x15mm pointed tip bullet from a 15 round magazine that could hold an extra round in the chamber.