I've been issued several Pelican cases, my last one came new and cut out for the M4+M203 and M9 had slots for 12 rifle mags, 4 M9 mags, little circle cut out for an Otis cleaning kit and a few other little spots for misc items. My first experinces with Pelican was for the DMR, and that thing got tossed off the back of a 5 ton, then thrown into the back of a cargo hummer, Rifle still had a perfect 300 yrd zero, after surviveing 12 weeks in 29 palms and never haveing to re-zero, I was pretty impressed. The throwing of my rifle was when my back was turned, btw. If a Pelican case is Marine Proof, it's good enough for everyday life.
I have a 1750, I picked it up new off Ebay shipped for $215, think it was called the "box store", they're out of the LA area in CA I think, the guy cuts some great deals, it's a second job for him.
The Pelican warranty reads somethink like, 'guaranteed for life, but not against shark attack, bears and children under 7' LOL, I got a kick out of it, never had a problem and thier worth thier money in my opinion.