Mossberg 59 Line Launcher - Manual (Page 3)

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The Line Launcher is designed for 12 ga. Mossberg ® 590 ® (9-shot capacity)
and 12 ga. 500 ® (6-shot capacity) models with a full stock only. Do not attempt
to modify any other model or brand name shotgun firearm for line launcher
use.
Preparing the Line Launcher Model and Kit
Inspect and ensure the manual safety button is fully rearward to
the “ON” (SAFE) position.Visually and physically inspect the
chamber, elevator and magazine tube to be sure the shotgun is
completely unloaded. Point the muzzle in a safe direction, and leave
the action open, with the forearm in its most rearward position.
The special Line Launcher barrel, with canister attached, must be the only barrel used
for line launching applications. Remove any other shotgun barrel if it is assembled to
the action. Follow disassembly instructions found in the shotgun Owner’s Manual.
590 ® Line Launcher
9-shot 590 Models have the proper length (19 1/2") magazine tube. A 19 1/2"
magazine tube exposed length is imperative to the Line Launcher function.
500 ® Line Launcher Kit
500 ® 6-shot model magazine tubes require a “magazine tube extender.” After the
shotgun barrel has been removed, thread the 5 1/2" magazine tube extender to the
14" magazine tube, and hand tighten firmly. There should be no gap between the
magazine tube and the magazine tube extender.
“OFF” (FIRE) “ON” (SAFE)