In the world of law enforcement Pelican is a company that is known for quality lights and heavy-duty protective cases that offer an awesome guarantee. While I've reviewed several Pelican lights, I have never looked at the company's protective cases until now.
As more and more agencies are authorizing patrol carbines and shotguns with optics, protecting them while sitting in the back of a patrol vehicle becomes an important issue. Your $5 zippered gun sleeve just won't cut it unless you want to rezero your red dot every time you take the weapon out to use it. This is not practical should you need the weapon to handle a situation.
I suggest a case built to handle the rigors of duty. I have a Springfield Armory M1A with a McMillan A4 stock and 4-16 scope that needed a happy home. For it I chose to use Pelican's 1750 case. It's constructed of heavy-gauge polymer with four double-throw latches to ensure the case stays closed. It also has two reinforced points for locks so the case stays secure.
The interior is closed cell foam padded with a customizable lower insert. Once I had cut out the areas for my M1A and spare magazines, I secured this insert to the base pad using silicone sealer/bonding glue. Now the foam insert keeps the rifle and its gear in place should I have a clumsy moment and allow the case to slide off the bench or down a driveway (not that I have done that, but I have heard it happens).
Since I am a trained professional (those who aren't should not try this) I tested the case by tossing it off of a shooting bench with my M1A in it, several times. The scope did not lose zero nor did the rifle shift in the case. While I don't suggest you try it, I have found the 1750 makes a good chair or elevated nap platform; the walls and locks are that tough. If Pelican's case can survive me, it will survive the trunk of your car and protect your firearm.