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Low fps: m700 aics pcs bolt problem?

5K views 18 replies 4 participants last post by  cerboknight 
It could be several things. Weak knocker spring, mushed plate on the back of the mag. I could also be that are over filling your mags. Crummy seals which includes the valve seating to the bolt. You might want to take the valve out a little to see if your velocity increases. This also might include a weak spring supporting the brass rings that interfaces with he bolt.

Those are the correct plate but G&G has replacement parts that eliminate the need for that part altogether. I would suggest trying to simplify a overly complicated system. Any worn part could affect performance negatively but it should be very visible for you to loose 100+FPS. Have you tried chronoing the joules of heavier BBs. Usually gas gun can see some serious advantages with heavier ammo. 390FPS with .4g BBs is roughly 550FPS with .2g BBs.

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