The Rapid Reloader is a barrel mod (fits on pistols, SMGs, ARs, and some shotguns) that provides two critical bonuses:
reduces the AP cost of reloading weapons by 10 AP . underrail rapid reloader
The verdict on Rapid Reloader depends entirely on your weapon of choice: The Rapid Reloader is a barrel mod (fits
However, heavy gunners have an alternative: and Smart Weapons . underrail rapid reloader
Investing in the Mercantile skill is highly recommended to unlock "special stock," where these rare parts are more likely to appear. Best Weapons for Rapid Reloader