OE TECH/CONDOR 42" MOLLE gun bag
This is a gun bag, and a great one at that.

First impressions.
Seems fairly quality, haven't used the molle straps on the sides of the front but everything seems to have held together nicely, lots of pockets and room. It's flat when it's not full, so thats nice.
Practicality.
Pictures speak paragraphs here:

what the fuck, theres no way hes gonna fit all that stuff in there

woah holy shit he did
FYI: That was..
1x AK74U
1x JG M4 S-SYSTEM
1x DE M1014 Long barrel
9x M4 Magazines
6x AK Magazines
7x Shotgun shells
1x Stick battery
1x Mini battery
1x KJW M1911
1x KJW M1911 Green gas magazine
1x WG Sport 7 (6" barrel version)
And I had room for a bag of BB's and roughly 2 cans of green gas left over, and that was without putting my mag pouches on the sides of the front to hold the mags.
One thing i do NOT like however is the backpack straps.

worst thing about this bag, goddamn
The mounts for the straps like to slowly come undone when the big is heavy or full, so i always end up putting a sling on the areas where the backpack straps attach to the bag and carrying it that way.
Overall this is a great solution for transporting all your toys to the field, especially since it has room for an AK74U in the pistol compartment and because the insides are all padded it will keep em safe too.