As indicated in this thread, there is currently no way to easily see which weapon attachments can be equipped to which weapons once you purchase the weapon attachment.
Below is a matrix of weapon attachments by weapon type: (Note: clubbing, piercing, slashing weapons do not have weapon attachments available to them)
[image: i.imgur.com]
Screenshots for reference:
Heavy Artillery
[image: i.imgur.com]
Machine Gun
[image: i.imgur.com]
Pistol
[image: i.imgur.com]
Rifle
[image: i.imgur.com]
Shotgun
[image: i.imgur.com]
SMG
[image: i.imgur.com]
... and finally, a listing of weapons by weapon type and class:
As always, if you find something conflicting, please let me know and I'll verify and correct it.
Hopefully you find this to be helpful!
- Andyman
Below is a matrix of weapon attachments by weapon type: (Note: clubbing, piercing, slashing weapons do not have weapon attachments available to them)
[image: i.imgur.com]
![[image: i.imgur.com]](https://i.imgur.com/7dHAYQt.png){kind=link}
Screenshots for reference:
Heavy Artillery
[image: i.imgur.com]
![[image: i.imgur.com]](https://i.imgur.com/MTx6i9b.png){kind=link}
Machine Gun
[image: i.imgur.com]
![[image: i.imgur.com]](https://i.imgur.com/oMNVNk0.png){kind=link}
Pistol
[image: i.imgur.com]
![[image: i.imgur.com]](https://i.imgur.com/vkyv5wF.png){kind=link}
Rifle
[image: i.imgur.com]
![[image: i.imgur.com]](https://i.imgur.com/EeNSdLF.png){kind=link}
Shotgun
[image: i.imgur.com]
![[image: i.imgur.com]](https://i.imgur.com/UbpYB2Q.png){kind=link}
SMG
[image: i.imgur.com]
![[image: i.imgur.com]](https://i.imgur.com/v34wWEp.png){kind=link}
... and finally, a listing of weapons by weapon type and class:
| Type | Weapon | Class |
| Heavy Artillery | Anti Tank | Primary |
| Heavy Artillery | Egg Propelled Launcher | Primary |
| Machine Gun as of Sep 1, 2020 | Minigun | Primary |
| Heavy Artillery | Neutrilux 2000 | Primary |
| Heavy Artillery | Flame Thrower | Secondary |
| Heavy Artillery | RPG Launcher | Secondary |
| Machine Gun | M249 PARA LMG | Primary |
| Machine Gun | Prototype | Primary |
| Machine Gun | Rheinmetall MG 3 | Primary |
| Machine Gun | Snow Cannon | Primary |
| Pistol | Beretta 92FS | Secondary |
| Pistol | Beretta M9 | Secondary |
| Pistol | Beretta Pico | Secondary |
| Blunderbuss | Secondary | |
| Pistol | Cobra Derringer | Secondary |
| Pistol | Desert Eagle | Secondary |
| Pistol | Dual 92G Berettas | Secondary |
| Pistol | Fiveseven | Secondary |
| Pistol | Flare Gun | Secondary |
| Pistol | Glock 17 | Secondary |
| Homemade Pocket Shotgun | Secondary | |
| Pistol | Lorcin 380 | Secondary |
| Pistol | Luger | Secondary |
| Pistol | Magnum | Secondary |
| Pistol | Qsz-92 | Secondary |
| Pistol | Raven MP25 | Secondary |
| Pistol | Ruger 22/45 | Secondary |
| Pistol | S&W M29 | Secondary |
| Pistol | S&W Revolver | Secondary |
| Pistol | Springfield 1911-A1 | Secondary |
| Pistol | Taurus | Secondary |
| Pistol | USP | Secondary |
| Rifle | AK-47 | Primary |
| Rifle | ArmaLite M-15A4 Rifle | Primary |
| Rifle | Enfield SA-80 | Primary |
| Rifle | Gold Plated AK-47 | Primary |
| Rifle | Heckler & Koch SL8 | Primary |
| Rifle | M16 A2 Rifle | Primary |
| Rifle | M4A1 Colt Carbine | Primary |
| Rifle | Sig 550 | Primary |
| Rifle | Sks Carbine | Primary |
| Rifle | Steyr AUG | Primary |
| Rifle | Swiss Army SG 550 | Primary |
| Rifle | Tavor TAR-21 | Primary |
| Rifle | Vektor CR-21 | Primary |
| Rifle | XM8 Rifle | Primary |
| Shotgun | Benelli M1 Tactical | Primary |
| Shotgun | Benelli M4 Super | Primary |
| Shotgun | Ithaca 37 | Primary |
| Shotgun | Jackhammer | Primary |
| Shotgun | Mag 7 | Primary |
| Shotgun | Nock Gun | Primary |
| Shotgun | Sawed-Off Shotgun | Primary |
| SMG | 9mm Uzi | Primary |
| SMG | AK74u | Primary |
| SMG | Bushmaster Carbon 15 Type 21s | Primary |
| SMG | Dual Bushmasters | Primary |
| SMG | Dual MP5s | Primary |
| SMG | Dual P90s | Primary |
| SMG | Dual TMPs | Primary |
| SMG | Dual Uzis | Primary |
| SMG | MP 40 | Primary |
| SMG | MP5 Navy | Primary |
| SMG | MP5k | Primary |
| SMG | P90 | Primary |
| SMG | Pink Mac-10 | Primary |
| SMG | Skorpion | Primary |
| SMG | Thompson | Primary |
| SMG | TMP | Primary |
| SMG | BT MP9 | Secondary |
Hopefully you find this to be helpful!
- Andyman