Editing Darkside Inc (section)

=== Mark IV ===

The '''Mark IV''' was a later version of the Darkside Mark series.

VintageRex dates the marker to 1991 and records the following specifications:[5]

{| class="wikitable"
! Specification
! Detail
|-
| Calibre
| .68
|-
| Action
| Pump-action
|-
| Valve system
| Nelson
|-
| Feed system
| Integrated gravity-fed magazine
|-
| Magazine capacity
| Approximately 40 paintballs
|-
| Barrel
| Fixed
|-
| Gas source
| 12-gram CO₂
|}

VintageRex describes an external CO₂ changer on the Mark IV and contrasts this with an internal arrangement on the Mark II. However, the original Mark II advertisement also illustrates an external quick-change system.

The surviving descriptions are therefore insufficient to establish a definitive distinction between the models based solely on their CO₂ arrangements.[2][5]