DD-27 V2.75 Compact AST Rifle

This is it. the one the only, the DD-27!. I have worked long and hard on this gun. It is the strongest to date firing pin type K'Nex gun. It works with the most frictionless-to-date barrel for ram guns. The barrel is more then 1 foot long, BUT it is only composted of 12 connectors. shoots the 7 ^1/2 in. grey rod.

history:
V1.0- Made as something when i was bored, never took it apart.
V1.5- I modified it for some more power
V1.75- Added Perfect Duck's pistol grip
V1.9- Added a true trigger mechanism and a better barrel
V2.0- Significant changes to the front barrel were made, stock was added.
V2.1- Heavily fortified the front of the barrel.
V2.5- Added barrel extension to make it shoot greys harder then the other red rod ammo.
V2.75- Nothing big but i added a chain on the top

Believe me, the power of this thing is unrealistic and you will never truly understand the power without making the gun.

It gets all this power from three things.

1. The barrel does not have that much friction, it still has friction but with only 12 connectors composing the entire 1 foot 2 in. long barrel.

2. It uses the KILLERK pistol type mechanism were the bullet is held in exactly were the ram will make contact with it. But mine is better. There is 1 in. of space between the ball joint(note i used a light grey connector instead of a ball joint) and the connector before it. So the gun does not lose any power before the ram hits the ball joint. Normally it would hit the side of a connector and have to go through the hole in it and that would line it up with the ball joint. And then the ram has to push through the sides of the ball joint. With no connector before the ball joint the ram just glides over the the ball joint, not losing any power, but still hits the rod, firing the gun.

3. It has almost a complete draw back of the firing pin. The block is exactly one grey spacer after the tan lock that holds the ram back. If i moved the block one blue spacer up the firing pin could not be pulled back far enough for the block to engage. This helps because the firing pin has almost a entire grey rod length to speed up and gain momentum that ultimately gives the gun power.

stats:
standard round (grey rod)-80-100 feet
sharpened rod 70-90 feet
grey connector on grey rod -accurate to 60 feet!
2 3d blue 7 slot connectors with blue clips all over on it connected to grey rod- 40 feet shrapnel 10 feet away from bullet

stats were taken with two #64 rubberbands tied togeather.
ranges and power may vary.
Please comment and rate!!!

Parts list:*

RODS:
green-----------------------37
white------------------------100
blue-------------------------18
yellow----------------------15
red--------------------------1
grey-------------------------2(black recommend)

CONNECTORS:
dark grey------------------16
light grey------------------5
red/granite---------------45
green----------------------11
yellow---------------------49
orange--------------------35
white-----------------------22

EXOTIC:
tan locks------------------2(one needs to be weakened, see Perfect Duck's twin pistols to find out how)
black hands--------------18
hinges---------------------2
ball joint ball-------------1
blue spacers------------21
grey spacers------------14
flexy yellow rod---------1

OTHER:
tape

*Subject to counting errors

This is a some what special part. it is one of the only guns that get a complete draw back of the ram. the block on this gun is right before were the ram can not be pulled back any more(a tan lock holds the ram in). So i get almost a entire grey rod length for the ram to speed up.

This as around the easiest part of the entire gun. You need to add tape to the ram, If you don't then you will have broken pieces when you fire the gun.

The one tan lock in the picture is the modified one.

Sorry about this being a big part, but it should not be hard, as this part is not complicated.

Not hard, this is the same as Perfect Duck's handle. Instructions are not that in depth because you can find them on perfect ducks instructable.

Most important part, this is what gives the gun its power. I explained it all on the intro so just make from the pictures. This is the longest step, i tried to make it as easy to make as possible but pay attention to what you are connecting.

Yes, the barrel gets bigger. We are going to add more to the barrel and a hand grip.

Add ons to the barrel. They make the barrel a lot stronger.

Make the stock, its not the best but it works well, and looks cool.

Add the trigger

Make the chain, and attach were noted in the picture.

Just attach 2 rubber bands to the ram, and one to the trigger. Then pull the ram back, and push a grey rod into the light grey connector in the barrel. Then just aim and pull the trigger.


Don't get hurt like i did!