Thread: A barrel length question.

Seeing as alot of you are far more knowledgeable than myself on this topic, I thought I would ask the following:

What would be the ideal barrel length to shorten my barrel to before I would start to see any negative effects?

Of course this is a tough question without all the details so....
I have a CMMG evo .22 upper for my AR with a 20" barrel that I have finally got running reliably.
Now that I am looking to add a can to the end of it (probably a DPT due to weight/cost/positive forum feedback) the whole setup will be rather long.
I only use it to shoot rabbits/hares/possums on friends farms running CCI subs.

Thanks in advance.