OK so I picked one of these up from Cabela's and it just came today. I have to say, I don't know how I managed without one of these.
I shoot 12ga, .38, 9mm and 22 so the 4 box system is perfect for me.
The cans are removable and perfectly sized. They may be a little smaller than you think so be sure to note the dimensions
Unit Dimensions: 23.5” x 11.3” x 7.5”(H); Made in the USA
Can Dimensions: Inside: 3.4”(L) x 8.9”(W) x 6.1”(H)
Outside: 5”(L) x 11.3”(W) x 7.2”(H)
• Water-resistant O-ring seal
What's really cool is that they are stackable so you can stack entire units on top of each other like legos.
At 32.99 + tax, Cabela's easily is the best price with some places charging double for these.
If you don't live near a Cabela's and can't pick it up, they charge $5 for reg shipping or $8 for express. I did the express cause I'm impatient af.
https://www.cabelas.com/shop/en/mtm-ammo-crate