Open Cockpit Mk1 (stockalike)
more images
http://imgur.com/a/ka5OW
Download
Kerbal Curseforge
Spacedock
also available in CKAN
MIT license
This mod add 7 parts
Main cockpit, Gunner seat, Small windshield, Big windshield, Headrest, All-In-One module and Drone core
Basically this "cockpit" is just only external seat in Mk1 size part
so all abilities and problems of external seat also exist
You can board from any side if Kerbal stay close enough, without any "grab" and "board".
Kerbal sometimes can survive even if cockpit explode due hard landing
But you can't load Kerbal in seat at launch without other mods ( "Take command" mod can do it ).
Also pilot take all Aero and Heat effects ( and it have absolutely insaaaaaaaaaaaaaane drag ).
I make it as a "chair" only by this reason, open Kerbal head without any heating looks very strange
Small windshield and Headrest is only decorative parts, but Big windshield have collision volume much larger than
it's visible size and can ( sometimes ) protect pilot from reentry overheating, so making spaceplanes and rockets
with this seat hard but posible. Main problem is a huge drag of Kerbal, so spaceplane with 1 pilot per 1 Rapier
just can't climb at speed faster than 300 - 400 m/s at low altitude
This mod tested with Kerbalism and works fine, just set priority of batteries and oxygen tanks on vehicle higher than
default to prevent discharge pilot spacesuit, and not forget reload it manually after EVA mission
Tested with Take Command, works fine
Thanks @linuxgurugamer for help