So, I will create the new one and eventually delete this guide.

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Some can be applied but some cannot, depend on what category of weapon such as
“Ammunition” for all shotgun only and some special weapons (both primary and secondary weapon)
“Sight” cannot be applied for all Akimbo weapons
“Gatget” cannot apply the compact laser to “Castigo.44 Revolver”
And more…

Mainly benefit for these things below

























-Weapon Skin: custom color etc.
-Barrel
-Barrel Ext
-Boost: Accuracy, Stability, Concealment
-Custom: Single Fire, Auto Fire
-Foregrip: Stability
-Gadget: Flashlight, Compact laser etc.
-Grip: Accuracy, Stability, Concealment
-Magazine: Magazine size, Reload time etc.
-Upper Receiver
-Lower Receiver
-Sight
-Stock


Damage+Extra (some may require DLCs)

+000 Buckshot = Damage +15
+Flechette (long range armor piercing): Damage (-3), Accuracy (+8)

+AP Slug: Total ammo decreased by a few, Damage +15, Accuracy +8
Benefit: Fire a single lead slug that penetrates body armor, enemies, shields and walls


















+HE Round= Total ammo decreased by a few, Damage +3, Accuracy (-13)
Benefit: Fire one explosive charge that kills or stuns targets.
Caution: can damage your teammates too

+Dragon’s Breath Round: Total ammo decreased by a few, Damage (-6), Accuracy (-4)
Benefit: Fire pellets that go up in sparks and flames. Burns through shields and body armor.
Cannot damage your teammates.

Adding to the weapon may decrease total ammo and damage
+Poisoned bolts/arrows
+Explosive bolts/arrows (similar to HE round)
+Incendiary Round: Fire a round that causes a fire at point of impact

Modify, buy a few weapons and grab a specific weapon to complete the requirement.
Some achievement requires more than just equipped the right weapon but you have to wear the right mask and pick the right difficulty. Check it out by go into “ACHIEVEMENTS” and search by the achievement’s name for sure.

This weapon can switch to use grenade, by pressing ''Deploy BIPOD KEY"
Option > Controls > Edit Keys > Deploy BIPOD
Grenade mode
Magazine size: 1
Total ammo: 3

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2109623971

**GL40 and Piglet Grenade Launcher are quite the same,
just magazine size and reload time are different.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=798297580

Commando 101 Rocket Launcher. This weapon has no ammo pickup, so you have to get it from ammo bag only.
Importantly, make sure you know how “Bulletstorm Skill” works, it’s pretty useful because you need ammo bag.
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2089631004

-Use the Commando 101 Rocket Launcher to destroying the helicopter turret, for achievement in Biker Heist on day 2 and Green Bridge Job. You can use another weapon to do it but this weapon is one of the choices.

-Use the Commando 101 Rocket Launcher to kill enemies far from you such as snipers and shields or use any shotguns with Dragon’s Breath Round equipped.

-You can use the OVE9000 SAW or use shaped charges to open the door or cage
-You can use the OVE9000 SAW or use ECM Device to open the ATM
(It has no ammo pickup for OVE9000 SAW both primary and secondary, so you have to get it from ammo bag only)

There are many ways to do objective, a decision you have to make which one is the best to complete the job faster and more efficient.

Some of really bad guns: All “Akimbo Shotguns” (Without helping skills)
How are they really bad?
Akimbo Goliath: good damage but decent ammo pickup and shoot a single fire only
Akimbo Brothers Grimm: good ammo pickup but really bad in term of damage
Akimbo Judge: Highest damage among other akimbo shotguns but really bad ammo pickup and bad stability.


In personal, I like to use the Akimbo Judge.
With helping skills and perk decks, you can possibly do anything you’d like.
-High damage (easily to kill enemies with a few shots)
-Concerning about Health? (use Grinder Perk Deck or Gambler or any)
-Eat lots of ammo and low ammo pickup (“Ammo specialist skill tree could help)