Sources:

- pistol:
  - 357_revolver: https://openclipart.org/detail/8140
  - colt_1903: https://openclipart.org/detail/245854
  - colt_45: https://openclipart.org/detail/230165
  - colt_peacemaker: https://openclipart.org/detail/133459
  - p2022: https://openclipart.org/detail/202068
  - snub_nosed_revolver: https://openclipart.org/detail/307178
  - tokarev_tt-33: https://openclipart.org/detail/169727

- rifle:
  - air_rifle: https://openclipart.org/detail/164881
  - lever_action_shotgun: https://openclipart.org/detail/179891
  - m1_carbine: https://openclipart.org/detail/230173
  - m1_garand: https://openclipart.org/detail/230174
  - mas-36: https://openclipart.org/detail/202041
  - mosin-nagant_1891: https://openclipart.org/detail/270037
  - musket: https://openclipart.org/detail/66511
  - pump_action_rifle: https://openclipart.org/detail/170004
  - twin_barrel_shotgun: https://openclipart.org/detail/254333
  - winchester_30-30: https://openclipart.org/detail/133585

- machine_pistol:
  - mauser_c96: https://openclipart.org/detail/167618
  - mp5: https://openclipart.org/detail/286224

- assault rifle:
  - ak_47: https://openclipart.org/detail/20271
  - m16: https://openclipart.org/detail/9642
