This fits my mid-length 39" AR15 with mounted Refield CounterStrike reddot just fine. Fits across the back seat of my compact hatchback. Too big too fit in the back of the car. Room for all my magazines and the firearm. Additional room for a hangun if desired. Interior middle layer of foam is made up of 3/4" squares that you pick out to make the case fit the firearm. If I don't sell my 20" AR (on consignment at local GS), it should fit it too.
Pros: Locks, sturdy, easy to fit foam interior. Weatherproof.
Cons: Heavy and bulky
This review was written in the old system and had content requirements that are different than reviews written today.