Here is the full list of all 37 Gun Club VR achievements.
Shoot a fire alarm to set it off
Get a headshot on every target in a range
Get a perfect reload
Spend only one bullet per target in a range
Complete a sideshow range in under 25 seconds
Destroy the last target of the range with the last bullet in your clip
Equip overpressure rounds
Shoot off the leg of a zombie
Let every target fall over from time-out
Equip incendiary rounds
Equip explosive rounds
Equip Zombie Rounds
Equip armor piercing explosive rounds
Destroy 50 food items in the Sandbox
Destroy 2 targets with one round (requires AP rounds)
Fire 10,000 rounds
Attain at least bronze on every Warehouse range
Attain at least silver on every Warehouse range
Attain at least gold on every Warehouse range
Attain platinum on every Warehouse range
Equip armor piercing rounds
Have $1,000,000 cash
Equip hollow point rounds
Purchase a skinned version of a gun
Blow up more than one target at once using an explosive
Equip as many attachments as possible to an owned gun
Equip the largest magazine available to an owned gun
Use a grenade on the final target in a simple range
Own all of the available weapons
Own half of the available weapons
Complete 50 ranges
Get 10 headshots in a row
Attain at least bronze on every Allied range
Attain at least silver on every Allied range
Attain at least gold on every Allied range
Attain platinum on every Allied range
Destroy 500 food items in the Sandbox