i have used many cheap and used guns in the past month or 2. my A-5 is used and i still have not found a more reliable gun.
i have the a-5 with no mods exept for the extendable stock.
my friend has the same marker with mods like the e trigger, i like the response of his trigger but it is a little overkill. i recomend the rap4 spring kit. it is an interchangeable spring for added fps. the stock ratchet lasts but the aluminum ratchet hardly wares out.
The best strength would be the cyclone feed, it keeps from ball chopping.
I have not found a weakness at all with this yet.
This gun is a low maintanance gun and is verry cheap. the cyclone feed is very responsive and cuts back ball chopping. i haven't chopped a ball yet and i have sent thousands of balls through it. the gun has power; quick and easy put together and tear down great trigger response, as fast as you can hit the trigger the cyclone keeps up. mods are quick and easy. the main parts like the grip, the stock, and the co2 line are all pins. the cyclone feed is screws. there are small parts so a clear surface is a good place for teardown. it is smart to get some extra pins and screws just in case.
Get this gun. It has all of the power, if you make it right it looks good. The a-5 builder is a good place to set up your gun how you like it. You can make almost any us military gun off the a-5, but just stock is good too.