XCOM 2
87 Achievements
GOG
Locked and Loaded
Upgrade a weapon
67.1%
How to unlock the Locked and Loaded achievement in XCOM 2 - Definitive Guide
Once you have obtained a weapon item (a scope for example) go to the armory on your ship. Once there select VIEW SOLDIERS, choose a soldier and scroll to weapon upgrade. Select the upgrade you want to attach to the weapon and the achievement is yours.
1 Comment
I think you ought to add that you must research Modular Weapons first.
By Lt Davo on 19 Nov 2016 17:57
Upgrades are permanent modifiers that can be attached to a soldier's weapon from the Loadout screen. Upgrades are unique to the weapon on which they are attached and can be replaced by another upgrade but not reused. Higher tier weapons have additional upgrade slots. You can obtain upgrades as random loot from slain items or by purchasing them from the Black Market. You only need to add a single upgrade to a weapon for this trophy but you should be equipping upgrades every time you find one.
For a list of available upgrades: LINK