The bracketed long barrel improves range, damage, recoil and accuracy (when looking down the barrel) at the cost of a 10% reduction in ammo capacity and hip-fire accuracy. Unlike the long barrel for the laser musket, a muzzle modification can also be attached alongside this modification.
Fiber optics (3)
Extended long barrel (1)
The bracketed long barrel can only be obtained via crafting at a weapons workbench.