Echo Crossbow

Intro: Echo Crossbow

That's right, a repeating crossbow.

STEP 1: Barrel

1 - Rails. Make two

2 - Barrel walls. Make two

3 - Barrel floor

4 - Add the floor parts to one of the walls with white rods as shown

5 - Add the other wall

6 - Add the rails onto the sides of the barrel

7 - Closeup of the back, showing how to secure the rails

STEP 2: Trigger

1 - Make

2 - Make

3 - Make

4 - Put them all together

5 - Add to barrel. Shown without the rails for clarity

STEP 3: Handle

1 - Make

2 - Put the pieces together with three white rods

3 - Attach to the barrel. Shown without rails

STEP 4: Magazine

Or just the top of the crossbow in general

1 - Oops, sorta blurry. Walls of the magazine

2 - Sides of the magazine

3 - Attach four white rods at appropriate places on one wall

4 - Slide side walls onto previously mentioned white rods

5 - Attach the other wall

6 - This goes on the back for a little stability

7 - Attach the magazine to the barrel

STEP 5: Bow

What's a crossbow without a bow?

1 - Two stiff, gray-sized rods in the front of the barrel. Connect at the ends with light grays

2 - Add two red connectors and two white rods to each side like so

STEP 6: Pump

1 - Make

2 - Make

3 - Add two yellow connectors to what you made from pic 2

4 - Connect the two things together

5 - Add the white rods and yellow connectors to the ends

6 - Prongs - they hold the rubber band. Make two

7 - How the pump attaches to the barrel. It takes a little pushing and pulling to get it around the rails

8 - Attaching the prongs to the pump. The white rods just slip into the hole of the middle yellow connector

STEP 7: Finishing

1 - Three bolts is all it can hold

2 - Pusher

3 - Two #64 bands tied together function as the bowstring

4 - Attach the tied bands around the front white connectors

5 - Rubber band for the trigger. Hook it in the orange connector and then around the white rod. This makes it not get stuck when you pull it down

6 - Bands for the pusher

7 - How the bolts should look inside the barrel.

When the tied bands are pulled back, they should go over the angled edge of the trigger and hook on the back. With those bands out of the way, a bolt gets pushed down into the barrel (note - sometimes the magazine and the barrel aren't exactly aligned. If this happens, just push the side of the mag a little so they line up). After firing, the system will reset. Just repeat.

Happy shooting and comments/criticism always welcome!

Comments

[ninjalim]

thanks i realy like it

[bboy321321]

how powerful is it, I'm guess i know in about an hour

[KnexFreek]

 Hey dradis, have you seen my repeating crossbow?

[crestind]

Interesting! Sort of like the Chinese Zhu Ge Nu.

[wangtrevor]

lol i call this the nu plain nu

[Stavroz]

You mean the Chu Ko Nu.

[crestind]

Well in pinyin it's zhu ge nu.

[SnapFitPieces(:]

 Seriously dude put in a ratchet it will be a killer

[beameron]

This works for ANYONE AT ALL ?? How to fire and load and lock and stuff IT DOESNT WORK !!

[knexsuperbuilderfreak]

it dosent work but mine will

[beameron]

NO WAY !!! U can lock this device U just made fack sh*t :P +_=

[Bugman9]

I made it and added a stalk with a scope and a big rubberband from the doctors.

[ILIKEPIE333]

dooooooooooooooooooooooooooooooooooooooooooooooooooooooooodddddddd!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[Stavroz]

I have it suscribed faved and fived. XD (Sorry Viccie ure lines)

[Stavroz]

It would be awesome to make te bow a sort of folding out like this on 0:13.

to make it more portable.

[Skreetsha]

Sweet idea, man! fived and faved!

[Stavroz]

Cool idea, so its pump action or is it like a bold?

[Electroinnovation]

You totally have a great idea!!!! Now for me to mod. I promise in under 1 month I will come out with a repeating crossbow that has a range of over 50 feet and will hold 5 shots. It wont have a pump but it will be insane.

[DrWeird117]

HALP! Everytime I try to pump it, the band doesn't go around the trigger...

[DRADIS]

Sometimes you may need to pull the trigger down slightly in order to give it a little extra help, OR you put a green rod into the middle of the bottom of the pump, facing the trigger, so it bumps into the trigger and pushes it down slightly.