The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- .22 (1 member)
- .303 (1 member)
- .338 (3 members)
- .357 (1 member)
- .38 (2 members)
- .408 (1 member)
- .45 (13 members)
- 12.7 mm (14 members)
- 12 Gauge (8 members)
- 14.5 mm (0 members)
- 20 mm (2 members)
- 23 mm (2 members)
- 30 mm (1 member)
- 4.73 mm (1 member)
- 40 mm (12 members)
- 5.45 mm (3 members)
- 5.56 mm (37 members)
- 5.7 mm (1 member)
- 5.8 mm (1 member)
- 6.5 mm (6 members)
- 7.5 mm (1 member)
- 7.62 mm (66 members)
- 7.65 mm (4 members)
- 7.92 mm (3 members)
- 9.3 mm (3 members)
- 9 mm (40 members)
- AAF (116 members)
- AAF Characters (5 members)
- AAN (8 members)
- ACR (49 members)
- ACR Characters (4 members)
- AFL (Spearhead) (6 members)
- AFMC (0 members)
- AFMC (CSLA) (22 members)
- AK-series (10 members)
- ARMA: Queen's Gambit (35 members)
- ARMA 2: Army of the Czech Republic (39 members)
- ARMA 2: British Armed Forces (38 members)
- ARMA 2: Firing Range (10 members)
- ARMA 2: Operation Arrowhead (98 members)
- ARMA 2: Private Military Company (28 members)
- ARMA series (8 members)
- ARVN (0 members)
- ARVN (S.O.G.) (17 members)
- AT/AA launchers (54 members)
- AT/AA launchers (ArmA) (5 members)
- AT/AA launchers (ArmA 2) (9 members)
- AT/AA launchers (ArmA 3) (7 members)
- AT/AA launchers (Army of the Czech Republic) (2 members)
- AT/AA launchers (British Armed Forces) (3 members)