The ACI 4 stage expansion chamber is great. It was worth the money. I used to have ice coming out of my barrel, and now thats gone. The rate of fire is good and when i used to shoot without the expansion chamber my gun froze a lot, and now thats gone and im happy with this expansion chamber
Weaknesses:
There is nothing wrong with this expansion chamber. I say it is worth the cash.
Conclusion:
This expansion chamber is worth the money and I think ACI made a good expansion chamber, and I reccomend this expansion chamber to anyone.
