TLDR: A 2 block thick door with an auto closing mechanism.
Statistics
Automatic closing time: 3 seconds
Resistant to small arms fire: yes
Resistant to explosives: no
Thickness: 50 cm (2 blocks)
Ability to delay closing: yes
Lock: yes
External lock: yes
Seals: yes
Warning lights when closing: yes
To open the door use the lever on the front of the door then look in the same place to open the second one.
Pressing the hold open button will delay the door closing for 5 seconds.
The lock will lock the door shut if either the internal lock is on or the external the door will be locked shut until both keys are off. (the external lock is located on the side)
this is designed to be modified for your own use please credit me in the description and ask if you can use it first if you decide to upload the vehicle.
feel free to ask questions in the comments.
(i hate that i have to say this but please don't upload this without modifying it)