Dwarf Cannon

Walkthrough
Talk to Captain Lawgof located south of the Coal Trucks (but within the gates). If you do not have the 20 Agility required to cross the log, you will need to enter the fenced area from the south via the gate. He will explain his dilemma of the goblin forces approaching from the south. He will allow you to temporarily join the Black Guard, the elite of the dwarven military. After you accept he will give you 6 railings and a hammer so that you can help with fixing the railings.

The damaged railings around the complex are clearly bent, repair these by "inspecting" the appropriate sections of railing. If you fail to repair a rail, you may take 1 or 2 damage or your Strength or Crafting will be temporarily reduced. Captain Lawgof will explain that communication has stopped with the watchtower. Head south to the watchtower just south of the gate near the dwarf commander, and investigate.
 * Note: Make sure you actually finish the conversation with Captain Lawgof, otherwise the dwarf remains will not spawn. The dwarf remains do not appear as a red dot on your map.

After finishing the conversation, the dwarf remains will be on the top level of the watchtower. The dwarf remains will be in the corner but will not be indicated on the map as a red dot, so be on look out.

Head south and go to the top level of the watch tower and retrieve the dwarf remains. Take the dwarf remains back to Captain Lawgof.

Devastated, Captain Lawgof will tell you that the dwarf who had been killed when the watchtower was overrun was Gilob who had a son named Lollk that is still missing.

The missing son
Items required: None.

Recommended: Food and a skills necklace. Head south of the watchtower then east around the fishing guild to a cave to find Lollk. You can also teleport to the Fishing Guild using a skills necklace. The cave is located just east of the entrance to the Fishing Guild.

The cave forks into three passages. Take the centre passage and head northwest to find the goblin outpost. Go further northwest to a room filled with crates inside. Search the northern most crate on the east wall (as seen in the picture) and Lollk will jump out. After thanking you for rescuing him, Lollk will run back to the dwarf commander.

The dwarven multicannon
Items required: None.

Recommended: A Falador teleport/amulet of glory/combat bracelet and a Camelot teleport/Ardougne teleport/skills necklace.

Return to Captain Lawgof, and he will thank you and ask you to fix his broken multicannon. Use the toolkit he gives you on the cannon. You need to match up the three tools with the three parts on the screen that shows up. Talk to Captain Lawgof again, and he will tell you that he doesn't know how to get ammo for the cannon. He will tell you to go to the dwarf base south of Ice Mountain above the entrance to the Dwarven Mine to find out about the ammo. Go to the dwarf base which is located directly south of the Black Knights' Fortress, north of Falador, and west of the Edgeville Monastery. The fastest way to arrive there is using a combat bracelet to teleport to the monastery. Alternatively you can teleport to Falador and walk there. Talk to Nulodion who is in the western building of the base. He will give you an ammo mould and some instructions.
 * 1) Use the pliers on the safety switch at the bottom.
 * 2) Use the hooked tool on the spring.
 * 3) Use the toothed tool on the gear located at the bottom of the hammer, on the gear.
 * Note: If you intend to make cannonballs for yourself in the future, take another mould by dropping the one he gives you and talking to him again.

Do not destroy Nulodion's notes as Captain Lawgof requires these. Doing so will require you to go back and speak with Nulodion to retrieve the notes.

Go back and talk to Captain Lawgof. He will reward you for your efforts.

'''Congratulations! Quest complete!'''

Reward

 * Quest point
 * Crafting experience
 * The ability to buy and use a dwarf multicannon
 * The ability to make cannonballs

Trivia

 * The dwarf multicannon can be purchased from Nulodion for through his chat dialog, or in excess of  in parts through his trade window. Alternatively the dwarf multicannon can be purchased from the Grand Exchange for approximately  coins.