The Frag Mk. 1 - Lightning Trail Mod is a variant of the Frag Grenade Mk.1 in Blacklight: Retribution. Both items have the same stats but the Frag Mk. 1 - Lightning Trail Mod adds a visual effect when the grenade rolls.
Once purchased, both the Frag Grenade Mk.1 and the Frag Mk.1 - Lightning Trail can be equipped simultaneously. The Frag Mk. 1 - Lightning Trail Mod may be purchased from the Customization Menu in Blacklight: Retribution.
Thrown item. A Modified Frag Grenade with custom HRV display modifications. Just as effective as a normal Frag Grenade but way more stylish.