History of Smallbore

Smallbore is a barrel perk described in game as a "dual strength barrel" that increases range and stability.

Stats

Destiny 2 Wiki's Smallbore page lists +7 Range and +7 Stability. Its general Barrels table instead lists +7 Range and +7 Handling, so sources disagree on the second stat; the dedicated page and the description text both say stability.

Where it rolls

The Destiny 2 Wiki lists it on Auto Rifles, Hand Cannons, Pulse Rifles, Scout Rifles, Sidearms, Submachine Guns, Fusion Rifles (including Linear), Shotguns and Sniper Rifles. Compare Fluted Barrel, which trades range for Handling.