This is the second, updated/upgraded version of the MBAR (Masterdude Bullpup Assault Rifle). It has many new features and is compatible with new additions. Like the rest of my guns it is semi-auto.

New Things:
-Larger carry handle
-Stronger trigger system
-New more compact mag
-Built in sight
-New rail system
-Cheek rest
-Easier to pull trigger

Pros:
-Strong
-Accurate
-Comfortable
-Removable mag
-Cheek rest
-True trigger
-Bullpup
-Carry handle
-Built in sight
-Lots of possible additions
-Semi-Auto
-Reliable

Cons:
-Uses a lot of pieces
-Can be complicated to load for some

More Instructables by Me

Image 1: Loaded without additions
Image 2: With bayonet and vertical grip
Images 3-4: With Bi-pod

Step 1: Barrel Part A: Making the Components

Make the following. Each part will be assigned a letter:

Image 1: Make 2.(Part A)
Image 2: Make 2.(Part B)
Image 3: Make 1.(Part C)
Image 4: Make 1.(Part D)

Step 2: Barrel Part A: Construction

Follow the images:

Image 1: Add blue rods where shown to Part A.
Image 2: Attach Part B.
Image 3: Attach Part C.
Image 4: Attach Part B.
Image 5: Attach Part A.
Image 6: Place Part D where shown.
Image 7: Attach metallic blue clip on the other side where shown.

Step 3: Barrel Part B: Making the Components

Make the following. Each part will be assigned a letter:

Image 1: Make 9.(Part A)
Image 2: Make 9.(Part B)
Image 3: Make 9.(Part C)

Step 4: Barrel Part B: Construction

Follow the images:

Image 1: Attach 4 red rods to one of the Part A's as shown.
Image 2: Add Parts B and C of the other parts as shown.
Image 3: After adding another Part A, add Parts B and C as before but reversed side wise.
Image 4-5: Keep repeating until you get it to look like this.
Image 6: Add a red rod where indicated.

Step 5: Main Body: Making the Components

Make the following. Each part will be assigned a letter:

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

Step 6: Main Body: Construction

Follow the images:

Image 1: Add the rods indicated to Part A where shown and a blue rod in a small gear.
Image 2: Add Part B, blue spacers, and yellow and blue rods where shown.
Image 3: Add Parts D, G, H, I, J, K, and M, as well as green connectors and yellow and white rods.
Image 4: Add Parts E, F,G, H, I, J, K, and M, and a green connector.
Image 5: Add Parts D, G, H, I, J, K, and M, and a green connector.
Image 6: Add Parts H, I, and J, and a blue spacer.
Image 7: Cover with Part C and add 2 blue spacers.
Image 8: Add Part L and a small gear.
Image 9: Add Part L.
Image 10: Add a gray connector.
Image 11: Flip to the other side. Add 2 blue spacers.
Image 12: Add a gray connector as shown.
Image 13: Add another gray connector as shown.
Image 14: Add a metallic blue clip.

Step 7: Handle/Sight

Follow the images:

Image 1: Make this.
Image 2: Make these.
Image 3: Add another yellow connector with a white rod to each as shown.
Image 4: Add white rods with tan clips as shown.
Image 5: Add light gray connectors.
Image 6: Add gray connectors.
Image 7: Add green connectors.
Image 8: Make these.
Image 9: Connect them as shown. Be sure they look like this and are not placed on the wrong ones.
Images 10-11: Connect the parts you've made so it looks like this.

Step 8: Magazine: Making the Components

Make the following. Each part will be assigned a letter:

Image 1: Make 1.(Part A)
Image 2: Make 1.(Part B)
Image 3: Make 2.(Part C)
Image 4: Make 2.(Part D)
Image 5: Make 1.(Pin)

Step 9: Magazine: Construction

Follow the images:

Images 1-2: Attach Parts A and B as shown.
Image 3: Add white rods as shown to Part C.
Image 4: Add Parts D as shown.
Image 5: Cover with Part C.
Image 6: Place the ammo pusher in the magazine as shown.

Step 10: Assembly

Follow the images:

Image 1: Connect the Barrel Part A to Barrel Part B as shown.
Image 2: Attach Barrel Part B to the Main Body as shown.
Image 3: Attach Handle/Sight to the Main Body as shown.
Image 4: Attach Magazine to the Main Body as shown.

Step 11: Loading and Firing

To load remove the mag and place the pin in the appropriate area. Now place the ammo in the mag. insert the mag into the ammo feed. Next push the white and blue rods in the ammo feed area out to the sides. Hook the rubber bands on the end of the barrel and the trigger spoke. Make sure the rubber bands are on both sides of the ammo. Once all the rubber bands are hooked push the blue and white rods back into the center. Remove the pin. Pull the trigger to fire (in case you didn't figure that out).

Image 1: Ammo.
Image 2: Magazine with ammo.
Image 3: Rubber band hooked on barrel.
Image 4: Rubber band hooked on spoke.
Image 5: Mag in gun. Remove the indicated pin when rubber bands are loaded.
Image 6: Loaded. View of ammo feed.
Image 7: View down the sight.
Image 8: Gun without mag.

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.

Step 12: Optional Additions

The Handle/Rail of the MBAR-2 was specially designed to be compatible with many different additions. These include bayonets, vertical grips, and bi-pods which are shown below. I have also made a grenade launcher for it but I don't have any images for it. The additions will be posted in a separate Instructable.