Focus Optics (Fallout Supplement)
From D&D Wiki
This mod extends the length of an energy pistol with additional focusing chambers and crystal arrays, imparting a +2 equipment bonus to damage rolls. This bonus damage is multiplied by critical hits.
Price: 12 TU/120 Caps; Scarcity: Very Rare; Repair DC: 20; Time: 1 hour
Parts DC: 35; Parts Used: 10; Craft (mechanical) DC: 25; Time: 24 hours