The K'NEX FN Five-Seven is a favored build by many K'NEX gun instrucable'ers. With 7 favorites and over 800 views, it is bound to be of good quality. This set of instructions will tell you how to build this "much liked" gun, but first, lets look at some stats.

Features:

• Smooth slide
• True trigger
• Shoots 30 -35 ft.
• Looks relatively accurate
• Does not need more than one broken piece
• It is to-scale

Let's start building!

Step 1: Lower Reciever

So, this is the step to build the lower receiver, by far the longest set of pictures in this particular instruction "handbook." To build, just follow the image notes, and you should be all set.

Step 2: The Upper Receiever

The upper receiver should be a relatively easy step to do, just follow the pictures and their image notes.

Step 3: Trigger Guard and Firing Pin

Just build what you see in the pics.

Step 4: Rubber-banding the FN Five-Seven

Again, just follow the pics.

Step 5: Finished!

Now that you are done with your K'NEX FN Five-Seven, get some one slot dark grey connectors, push them up the handle, get a magazine pusher (like one you see in the pics) that uses a rubber band to push it up, and pull back the slide until the FP catches on a bullet, allow the slide to go forwards, and then pull the trigger.

3 People Made This Project!

geoffio2007 made it!
matthew9876 made it!
akshat21045 made it!

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49 Comments

bailrave758

Question 9 days ago

I have made it but the trigger doesn’t pull smoothly. It does work but it clicks as you pull the trgger

Professor Cheese

5 months ago

Made a blowback version.

The Real Phil Swift

4 years ago

How thick are the cut rods on the handle?

The Knex Inventor

6 years ago

I built this one a while ago, but I could not get it to work. The slide kept coming off. Great model though.

Dr MonkeyMan

8 years ago on Introduction

Is big enough to be a Desert Eagle.

Fred the evil puppet

8 years ago on Introduction

Hey Red, I recently subbed to you, and I love your creations! They look so awesome :D

One problem I've had with this gun, however, is that it is rather unreliable and the top reciever wants to fly off. Maybe you could work to fix this in your next gun? I really like the slide idea though; It makes it feel like a real gun.