how easily does the glock 27 conceal?

The slide and grip are quite a bit thinner on the 27 vs. the 30.

I pocket carry my 27, but I am big & fat & have huge pockets.

I have a 26, same external size as the 27 and it conceals quite easily. I can't compare it to a 30 since I've never held a 30.

I have, however, held a .30/30.

I have a 30SF and for Christmas I bought a 27. The 30 was my carry gun and since december 25 I've been carrying the 27. This past weekend I took the 30 again and WHAT A DIFFERENCE. The 27 is much more easy to carry and more lightweight. The 30 is going to spend more time in the safe than what i thought.

I put mine in a IWB holster at about 3-3:30 and it just disappears!

It still feels and looks like a brick when carried IWB. But it does the job.

I have a 26 i conceal IWB at about 4-5 o'clock ish its not noticable. However you will know your carrying it all day long.

I carry a Glock 26 all the time, IWB in this holster-
http://www.fist-inc.com/holsters/holster/1A.htm
made in Kydex.
It's an incredibly thin holster, I think the 26 is plenty comfortable.

My G26 is so concealable I don't notice it at all after a while.

Go get a Glock Combat Master holster. Best holster I have ever had. $15! It will tuck your 27 right into your side and make it very easy to carry.

I routinely carry my G26 IWB for 14-15 hours under a t-shirt or tank top. It conceals almost as well as my SP101 and it is a bit thinner and easier to hide than my G30 was.

27 for carry?

The 26 or 27 Baby Glocks are easy to carry IWB , and you forget you have the gun with you . I carry my 26 when I walk my dog ,and forget about the, Not so good neighborhood I'm in.

You could make it disappear wearing just about anything(florida weather).