Re: AAC 300TM vs Cyclone
They are both thread on cans which I think is better then a QD model and you probably wont be able to use them on an AR-15 but you could use them on an AR-10 because the cans are both threaded 5/8x24, not unless you get an adapter for your ar-15. If I were you, I would get a dedicated thread on can for your 308 and a seprate qd or thread on can for your ar. If you get a QD mount can then there is the possibilty to use the can on both platforms.
I dont think there are many cons to geting any of the two. I have had some AAC cans and they are built very well. Only con is that they are thread ons which may make them less versatile for usage on two different platform with two different thread dimensions.
What is your purpose for the cans other than having a blast with them?Precision shooting,hunting?