The KING of K'nex RBGs: the Gnasher Shotgun

This is my favourite gun I have ever made (out of k'nex). It is a working model of Gears of War's Gnasher Shotgun (my fav video game gun).

This is a 8 shot semi automatic RBG. Different from other RBG's, you must break the lever (bring it forward) to initiate another shot. The gun is capable of taking heavy pressures, so feel free to lay on the elastic power.

I apologize in advance for some of the pics having poor picture quality. Just ask if you need clarification on any of them.

Hope you guys enjoy this as much as I do.

Dave


Ps: if you hold the lever forward and then shoot, all the elastics fly off at once.

Build exactly what you see here to construct the hand guard part of the lever (the part you put your hand in. The upper part also acts as a trigger guard.

Build what is depicted below. This part moves the function that allows the shotgun to be a semi-auto.

The Cog (right)

This is where all the elastics fit on. Note the double white combination for more strength.

Trigger (left)

The simple yet strong mechanism that initiates the firing

Cog Mechanism (middle)

This part here directly touches the cog when loaded, and is rotated out of the way to allow the gun to advance the cog. Note the white rod (acutally black)- make sure this part is inserted through the three grey connectors- it gives the gun its strength to withstand pressures.

Build this part. It is added onto the near end of the barrel. It exists purely for aesthetics.

Note: whenever you see the large blue panel, it is simply there to prop up the part- it isnt part of the design.

This is the part that you hold onto. It is very rigid for maximum grippage (is that a word?)

This is the pistol grip. You will need a bendy-white rod (actually purple if you have it) for the thumb rest.

If this grip seems too thin, it technically is, because the back of the lever thickens it when it is unbroken (in the rearmost position)... just trust me on this one.

These two walls house the mechanics of the gun, so it is especially vital you don't screw this up.

Here, simply snap on the grip to the right mechanical wall.

Note: I didn't realize you needed the green connector, so add it in. this will snap into the trigger axle. (shown below)

Insert the Cog wheel into the cnetral white (or black) connector. Make sure that the blue spacers are still in place.

Instert the trigger into the white (or black) connector closest to the grip. As noted earlier, the green connector snaps into the trigger axle. (the side not snapped into by a grey connector)

Now, attach the upper and lower parts of the lever.

Now, insert the lever into the leftern white connector. Make sure it is the blue rod, not the yellow rod with the spacers.

Build this simple device. When broken, the lever will bring this down-mimicking the real action.

Simply connect the two grey connectors with the green rod to have the lever mechanism complete.

Insert the mock-loading port into the right-most green connector near the thumb guard. Then, with slide the grey connector at the end of the movement arm into the white (or black) rod located just below the lever axle.

Now, attach the left Mechanic panel. Make sure all the axles and rods line up properly so everything works smoothly. You can try out the action now.

Simply build this top section of the gun.

Now, this may be complicated, but try it out. Build this system, and it will become the barrel.

Build this simple attachment. It will be added in the next step.

Attach this to the protruding green connector on the middle of the lever. Then, connect the green rods on the end of the green connectors to the grey connectors (45 degrees) on the top of the now concealed lever.

Now, snap on the grip- three of the orange connectors behind the first white (or black) connector.

Now, just connect the top rail to the barrel assembley.

Now, connect the left and right sides of the gun where you need to.

Before you can attach the piece, you need to install 4 small black connectors (see below). Then slide on the attachment with the corresponding holes in the upright parts.

Now, slide in four blue rods into the corresponding holes. The rod at the rear of the gun requires three grey connectors to be snapped in, and the forewardmost blue rod snaps into the 45 degree slot of the upright yellow connector.

Now, attach connectors in the fashion as you see below, sorry about the bad pics.

Now, attach mainly grey rods into the connectors you just installed... you're done construction!

Now, just attach elastics onto the trigger and cog mechanism.

Now, to load, break the lever forward, and hold it there.

Load an elastic onto the rearmost accessable notch on the cog wheel. To load another, rotate the cog wheel back until the trigger locks it into the next place.

Then, return the lever into the unbroken position.

Now, pull the trigger and then break the lever until you hear a click and see the cog rotate foreward to re-advance the cog wheel.

Or, as I mentioned earlier, you can break the lever, hold it there, and then pull the trigger to shoot off all loaded elastics at once.

Now go shoot stuff.

With this upgrade, I reinforced the lever and dog carrier mechanisms because under intense pressure, they fail. So, without further adieu, here it is.

All the parts you see have already been upgraded, so try and follow along the best you can, I'll try and be descriptive.

Simply detach the moch lever arms to gain access behind the mechanical wall.

Remove the right mechanical wall to gain access to the lever and dog carrier mechanims.

Modify the existing mechanical wall you just removed to look exactly like the one below.

Now, just remove the existing dog carrier and lever mech so you can modify them.

(shown is the already upgraded dog carrier and lever)

Now, modify your existing dog carrier so it looks like this one. Also, build the extra 2 arms. (shown below the dog carrier)

Now, just modify your lever mechanism so it looks like this one.

Now, as before just attach the mechanisms together using the arms. Then, just slide the extra arms on the yellow rod and white rod respectively. (they do not snap on, so they may fall off as you put them in the gun, but once in they retain their positions)

Now, modify the left side mechanical wall so it looks like this one (in the background)

To insert the parts, just re-position the parts as you did before, with the exact same axle holes. (don't forget to line up the mock-loading port arm with the old axle!)

Now, just re-attach your newly upgraded left mechanical wall with the old snap areas.

Now, just re-attach the carrier elastic and trigger elastic with in the old places, and the mock-lever arms, and you successfully upgraded your Gnasher to a stronger model.