What does Blow Back mean?

[Tacier]

What makes it differant/better/worse than a blow forward gun like a mag? Thanks in advance :agree:

[Sked Finger]

I don't know mags that well. But I would think they're the same except one blows back and one forward

[Koreanyo]

i dont really know much about it but i think it means that for semis, every time you pull the trigger the rear cocking knob thingy pops out, and goes back in. so when you pull the trigger lotsa times, it goes back and forth and back and forth :agree:


i guess :|

[UTLadiesMan]

Originally posted by UTLadiesMan
Open bolt blow back:
Bolt is at rest in the open position.
Trigger is pulled, bolt and hammer lunge forward powered by the main spring.
Hammer smacks valve pin, air pushes ball, air blows back hammer and valve.
Repeat.

Open bolt blow forward:
Bolt is at rest in the open position.
Trigger is pulled, valve is opened, bolt is propelled forward by the air from the valve.
Bolt fully closes, air pushes out ball.
Main spring returns bolt to the open resting position.
Repeat.

Closed bolt:
Bolt is at rest in the closed position.
Trigger is pulled, hammer smacks valve pin, air pushes ball out.
Something pulls back the bolt, and resets the hammer. (can be A/C pneumatics or pump rod, or something else)
Something closes just the bolt.
Repeat.

Electros:
Most are rather different and I don't feel like getting into them.