The Arc Raiders Gunsmith Bible: Blueprints, Stats, and The $7,000 Trap
There is nothing quite as humbling as resetting your account, upgrading a fresh Rattler to level 4, and realizing you can’t hit the broad side of the Matriach because you forgot how important a muzzle brake is.
If you are fresh off the Expedition reset, your weapons probably feel terrible. They kick, they sway, and alert every enemy within a 50 mile raidus. To fix this, you need attachments, but the game doesn't hand them all to you on a silver platter. You have a mix of starter gear, blueprint-locked upgrades, and "found only" Legendaries that are worth a pretty penny but are priceless in a firefight.
I have compiled the complete database of every attachment in Speranza. I’m breaking down what you can craft immediately, what you need to hunt down blueprints for, and the legendary items you absolutely must not sell to the trader.
Tier 1: The "Duct Tape" Phase (Unlocked)
These are the only attachments unlocked by default. You do not need to find a blueprint to craft them, you just need the junk in your pockets.
Availability: Unlocked immediately.
Crafting: Cheap (Plastic, Rubber, Metal).
My Advice: Put a Vertical Grip I and Compensator I on everything. It is practically free recoil control.
Tier 2 & 3: The Blueprint Grind
Here is where it gets tricky. You cannot craft Tier 2 or Tier 3 mods until you find the Blueprint (BP) in the world. Once you extract with the BP, the recipe unlocks at your crafting bench.
Availability: Locked until Blueprint is found.
The Trade-off: Tier 3 offers massive stats but comes with penalties (usually Slower ADS Speed or Durability Burn). Bigger isn't always better. If you value snap-aiming, stay on Tier 2.
The Legendary "7K Club" (Loot Only)
These are the items with a $7,000 Sell Price. You cannot craft them. There are no blueprints. You have to find them in crates or on dead Raiders.
Kinetic Converter: Increases Fire Rate.
Anvil Splitter: Triples your projectiles (Shotgun mode).
Horizontal Grip: The laser beam mod.
Warning: Do not sell them. You cannot just "make another one" if you regret it. This isn't Tarkov; there is no loyalty level to grind. If you sell it, it's gone.
What to Equip on What
Using the raw data, here is the meta breakdown for your specific loadout.
The "Spray and Pray" (Stitcher / Bobcat / Tempest) These guns climb walls when you shoot them. You need Muzzle Brake II immediately. It handles both vertical and horizontal recoil. If you have the blueprint, upgrade to Tier 2, but be careful with Tier 3 attachments that ruin your ADS speed.
The "DMR" (Arpeggio / Renegade) The Arpeggio fires in bursts with a gap between shots. You want a Stable Stock. This reduces the "Recoil Recovery Time," meaning your crosshair settles back to center faster between bursts. For the Renegade, slap an Extended Barrel on it to turn it into a hit-scan laser at range.
The Bottom Line
Check your workbench. If it's a Tier 1 item, craft it with trash. If it's a Tier 3 item, make sure you have the Blueprint and are willing to accept the penalty. And if it's a Legendary item you found in a crate, keep it safe. The credits aren't worth the regret.