Here is the full list of all 18 Action Commando achievements.
Picked up the SMG
Got the Minigun
Got the Plasma Rifle
Got the Ultra Cannon
Got the Shotgun
Got the Super Shotgun
Got the HE-Launcher
Got the Railgun
Got the Kopis
Badger is available as a follower
Kennedy is available as a follower
Krieger is available as a follower
Vivien is available as a follower
Grinder is available as a follower
Hellcat is available as a follower
Get the Centurion Armor
Get the Dashing Shoes
Get the Backpack full of Ammo