Well, there isn't enough infomation on the JS to make any judgement on it.
Nevertheless the longer barrel may improve accuracy at slightly longer range but not by much. Any improvement in longer accuracy without an increase in side could improve CQB capability in modern urban operteration as building and room nowaday can various in size greatly.
The barrel does make a difference in close quarter combat. For example the TMP which is widely consider very controllable and comfortable to fire, has a barrel lenght of 150mm and without a stock. Which we mean it a capable weapon within the 25 yard, though accuracy maybe comprise at that range or during high rate successive shots by a very small amount while the spread may help probability of hit at that range. Nevertheless, probaility of hit is normally is undesirable for any hostage rescue spealize, pin-point is what they need as probaility of hit also mean hitting the hostage.
Whereas the MP5 with a 225mm barrel, a trained personally can provide accuaracy pin point shot at 25 yard with little trouble. For my personally experience I found the MP5 very easy to handle at 25 - 50m with appropriate sighting you can achieve a very high level of accuarcy.
Nevertheless the longer barrel may improve accuracy at slightly longer range but not by much. Any improvement in longer accuracy without an increase in side could improve CQB capability in modern urban operteration as building and room nowaday can various in size greatly.
The longer barrel makes no difference in close quarter combat
The barrel does make a difference in close quarter combat. For example the TMP which is widely consider very controllable and comfortable to fire, has a barrel lenght of 150mm and without a stock. Which we mean it a capable weapon within the 25 yard, though accuracy maybe comprise at that range or during high rate successive shots by a very small amount while the spread may help probability of hit at that range. Nevertheless, probaility of hit is normally is undesirable for any hostage rescue spealize, pin-point is what they need as probaility of hit also mean hitting the hostage.
Whereas the MP5 with a 225mm barrel, a trained personally can provide accuaracy pin point shot at 25 yard with little trouble. For my personally experience I found the MP5 very easy to handle at 25 - 50m with appropriate sighting you can achieve a very high level of accuarcy.