That plays meaning cry " inclined mouth is prevented jump implement " , it is to be used reduce what jump on muzzle, be in commonly AKM musket (the 3rd model) on visibility arrives, following plan institute are shown, the inclined opening that can see muzzle is in apparently is prevented jump implement!
So, this what is inclined mouth can reduce the principle that jumps on muzzle? The principle lights the way that air gives from muzzle eject through changing high voltage namely, bring to muzzle inclined the counterforce that be down, achieve thereby reduce the goal that jumps on muzzle, probably analysis getting power pursues as follows, from inside the graph we can see: The eject direction that burns gas (gules arrowhead) be sideways up, again the interaction according to force, can bring a volume to muzzle at the same time the counterforce with equal, opposite way (blue arrowhead) , and of this counterforce is to be used reduce what jump on muzzle!
Everybody knows, AKM is AK-47 actually improve model (the letter inside " M " the abbreviate that is Modernizirovannyi, have improve model, modern meaning) , AK-47 has an apparent weakness is the raise on muzzle serious, this gunstock design that follows AK-47 is concerned, the gunstock of AK -47 is a bit inclined be down, the way that the direction that the consequence that this kind of design causes is recoil and gunstock support a shoulder to order active force is not in to go up point-blank, following plan institute are shown, the Huang Xian in the graph states the direction of recoil is linear, red line chooses the way of active force to touch a shoulder, can see these two do not have coincide point-blank apparently, so, the join forces direction that the consequence that cause is these two force is inclined up (everybody did an analysis getting power to understand) , so, this is one of reasons of bullish of AK-47 meeting occurrence muzzle!
And improve model AKM to raise precision, solve muzzle bullish problem, reduce thereby dispersed, besides add in muzzle part installed inclined mouth to prevent jump implement besides, gunstock design also is changed somewhat, that used straight gunstock namely (do not have at AK-47 relatively so tilt) , come so, the direction of the counterforce that the direction of recoil and gunstock touch a shoulder to nod is in probably same went up point-blank, following plan institute are shown, accordingly, used straight gunstock is designed and add installed muzzle to prevent jump implement AKM, be to be close friends on fire precision of the elder AK-47 at her!
