Duluth Trading Company fire hose cargo pants.
For summer wear they make a fire hose flex that is a little lighter weight.

The right front pocket even has a small muzzle pouch sewed into the bottom of the pocket.

Now, this is going to sound unbelievable but I'm going to list the firearms that I have carried in this front pocket:

Commander size 1911
Beretta 92
S&W 686 with a 4" barrel
S&W m65 with a 3" barrel
S&W J frames with 3" barrel

Ok, not all at once, just one at a time.
For pocket holsters I use old rough-out IWB holsters that I have removed the metal belt clip from. The rough-out holsters protect the trigger and also prevent hammer snag. They are smooth on the inside to protect the finish but the outside creates just enough friction to keep the holster in the pocket upon draw.

Duluth Trading Company fire hose cargo pants cost about $85 if you buy them new. I buy mine on flea bay for considerably less.

One word of caution, they run a little small, so I would recommend bumping up the waist and inseam sizing one size.

Ok, I love them. I've been wearing them for years and have never worn out a pair.