I use a Shark 308 can on my shorty AR and a SF 338 can on my Whisper bolt gun.

I purchased a Coastal MIMMS 9mm can on my Whisper and this high volume can works great. Plus with the various thread adaptors that can be purchased seperate, it can be used for other platforms such as a 9mm AR upper, UZI, etc.

http://coastalgun.com/products/mimms/