Introduction: MSAR-1

About: I make K'nex guns, specializing in semi-automatic, RBG-Slingshot hybrid systems which i use in most of my guns. Note: I am not responsible in any way for any damage, injury, or death caused by my Instructable…
This is my MSAR-1 (Masterdude Shotgun/Assault Rifle model 1). It is similar in design in many ways to my MAR-4, however it has many new things which make it different from it. It functions as both a shotgun and a rifle, depending on the ammo you load it which depends on the mag you use.

More instructables by Me

  • Assault rifle
  • Shotgun as well (without modding the gun, you only need a separate mag)
  • Removable mag
  • True trigger
  • Iron sight
  • Can store another mag in the back
  • Breech loading hatch
  • Cocking handle not joined to firing pin
  • Cheek rest
  • Adjustble dot scope with cover
  • Vertical grip
  • Accepts MBAR-2 Gear (bipod may need some changing but can be attached)
  • Lots of pieces
  • Not semi-auto
  • Range for rifle ammo not too impressive

Image 1: Gear attached and both mags attached (rifle mag is loaded)
Image 2: No gear.
Image 3: No gear. View of other side.

Step 1: Mainbody: Components 1

Make the following:

Image 1: Make 1(Part A)
Image 2: Make 1(Part B)
Image 3: Make 3(Part C)
Image 4: Make 3(Part D)
Image 5: Make 1(Part E)
Image 6: Make 1(Part F)
Image 7: Make 1(Part G)
Image 8: Make 1(Part H)
Image 9: Make 1(Part I)
Image 10: Make 1(Part J)
Image 11: Make 1(Part K)
Image 12: Make 1(Part L)
Image 13: Make 1(Part M)

Step 2: Mainbody: Construction 1

Follow the images:

Image 1: Add blue rods to Part A.
Image 2: Add Parts B, C, & D, gray connectors, white rods, and a silver spacer.
Image 3: Add Parts C, D, E, F, G, H, I, J, & K, and gray connectors.
Image 4: Add Parts C, D, & L, and gray connectors.
Image 5: Add Part M, and green/black rods.
Image 6: Add Y-clips and small gear.
Image 7: On the other side add small gear and gray connectors.

Step 3: Mainbody: Components 2

Image 1: Make this.
Image 2: Add on to it to make this. (Part A)
Image 3: Make this.
Image 4: And this.
Image 5: Put them together like this. (Part B)
Image 6: Make this.
Image 7: And this.
Image 8: Put them together like this. (Part C)
Image 9: And now make this. (Part D)

Step 4: Mainbody: Construction 2

Image 1: Insert Part A as shown.
Image 2: Attach Part D.
Image 3: Add Part B onto the black rod, and attach Part C onto the end of it.
Image 4: Turn the gray connector down.

Step 5: Rifle Magazine

Images 1-2: Make 2 of each of these.
Image 3: Make 1.
Image 4: Add white rods to the first part.
Image 5: Add the other parts as shown
Image 6: Cover with the last part.
Image 7: Make one of these for each mag you make. (Pin)

Step 6: Shotgun Magazine

Image 1: Make 4.
Images 2-4: Make 2 of each.
Image 5: Make 1.
Image 6: Add white rods as shown.
Image 7: Add/Attach the other parts as shown.
Image 8: Cover with the left over parts.
Image 9: Make one of these for each mag. (Pin)

Step 7: Sight

Image 1: Make 1. (Part A)
Image 2: Make 3. (Part B)
Image 3: Make 2. (Part C)
Image 4: Make 1. (Part D)
Image 5: Make 1. (Part E)
Image 6: Add blue rods to Part A.
Image 7: Add Part B, silver spacer and light gray connector.
Image 8: Add Parts B & D, and metallic blue clip.
Image 9: Add Parts B & C, a silver spacer, and light gray connector.
Image 10: Cover with Part E.
Image 11: On the other side, add gray connectors.
Image 12: Add tan clip.
Image 13: Add small gear.

Step 8: Front Grip

Images 1-2: Make 2 of the first and 1 of the second.
Image 3: Add blue and white rods.
Images 4-5: Add the other parts as shown.

Step 9: Cheek Rest

Just make it. One picture and no explanation should suffice.

Step 10: Attaching Extra Gear

Image 1: Attaching the front grip.
Image 2: Attaching the sight.
Image 3: Attaching the cheek rest.

You can get more gear from the MBAR-2 Gear.

Step 11: Use & Operation 1

First attach the rubberbands as shown in images 1-3. Then load the magazines, the rifle magazine (image 5) with the ammo (image 4), and the shotgun magazine (image 7) with shotgun ammo (Image 6). Then insert the magazine (like in images 8 or 10), and take out the magazine pin ,and then pull back the cocking handle to cock the gun as image 9. Then pull the trigger to fire. Pull the cocking handle back and repeat as needed. To manually, single, hand load the rifle, pull up the ammo hatch on the side as in image 11, insert the ammo, and then close the hatch.

Warning- This may cause harm or injury if misused. Do not point it at people. I am not responsible for damage, injury, or death caused by this instructable. Always treated it as if loaded.

Step 12: Use & Operation 2

Iron sight:

Image 1: Sight is down.
Image 2: Turn the knob up to extend the iron sight.
Image 3: FPS view using the iron sight.

Adjustable dot scope/sight:

Image 4: Raise the covers on the ends of the scope.
Image 5: FPS view.

Be the First to Share


    • Woodworking Contest

      Woodworking Contest
    • Electronics Contest

      Electronics Contest
    • Make It Modular: Student Design Challenge

      Make It Modular: Student Design Challenge



    7 years ago

    Is there a piece count?


    Reply 10 years ago on Introduction

    Could you be more specific, as in what do you mean by "f t e"? Are you saying "first time ever" by that?


    10 years ago on Introduction

    Read both parts of the "Power" section.


    Reply 10 years ago on Introduction

    If you are telling me that the pin is too large and that no barrel would be better, yeah, I kind of know but I was trying to make a kind of compromise between power and other stuff. Without barrel it would be difficult to have a spot to attach extra gear and I wanted a side cocking handle which would be detached from the pin itself. While both negatively impacted the gun, I deemed the sacrifice of some power worthwhile.


    Reply 10 years ago on Introduction

    You could make the middle section of the gun longer, and still keep the barrel exactly the way it is.

    The part on the pin that makes it too big has nothing to do with the priming handle. You could just as easily just a ball socket.


    10 years ago on Introduction

    Thank you for disconnecting the charging handle from the firing pin!


    Reply 10 years ago on Introduction

    Excuse me but I don't post the same gun over and over again. You may think so since they tend to have similar characteristics since I have a certain building style and usually use parts from previous guns, but they are different in certain aspects. I have already heard people comment on their belief that I lack innovation, however when I post a new gun, I post it since it has new features which are absent in previous guns. Sure, half the gun is similar to the previous MAR-4 from which it is based off of in some design aspects but it has an improved firing mechanism which others have commented that I should impliment, improved gear and sights, and many different and new things which make it NOT"the same gun". As for any future comments I suggest that you and others take into consideration the facts before commenting.

    Raz1r Knex Bull3t
    Raz1r Knex Bull3t

    Reply 10 years ago on Introduction

    Yeah, um, hey Sherlock Holmes, what you stated about your gun are just mods. Don't act like I'm so stupid. A gun like this doesn't need a whole other ible to post some mods, is it that hard to add them to the previous ible for the original gun.
    I feel like this, you state, "improved gear and sights," I think, "Big, whoop, you put new sights on it." So what if you made new sights, you don't need to make a whole new ible about it. You must have never heard the word "mod" have you.

    The Chunky Sniper!
    The Chunky Sniper!

    Reply 10 years ago on Introduction

    Erm... it's an improved version of HIS gun. If someone else was to post this, they would post this a mod, But since Masterdude posted this, he has he right to post this as a seperate gun. Try to take into consideration Instructables' "be nice" policy before you comment as well. Anyway, good job Masterdude - 4.5*.


    Reply 10 years ago on Introduction

    Thank you for the compliment and thanks for supporting me and pointing those thinks out.


    Reply 10 years ago on Introduction

    I could have made this a "mod" I'ble. However it would force whoever may wish to make this gun to first go to the previous gun, and then take certain parts of the gun apart, only to put them together again. This way it would save whoever may wish to make this time and trouble. And yet again I would have to point out that it isn't only some minor changes like a new sight. If I made a new sight or gear I would have posted a separate I'ble such as my previous "MBAR-2 Additions". If it were just as simple as replacing some parts of the gun such as the magazine with a new one I would have made it like my "MAR Mod: Gray Connector Ammo". I would now like any more discussion on this topic to be made by PMing.