SPCTRM SMG-10: Firing & Shell-Ejecting Toy Blaster

SPCTRM SMG-10

IMPORTANT: This is a toy that fires a projectile! Never fire at pets or unwilling participants. This can damage drywall and eyeballs, use caution and protective eyewear. Never brandish this as a real weapon or bring it out in public. Just because you know it's a toy, doesn't mean other people will. Make sure to check your local laws regarding replica firearms/ toy guns. Enjoy, be safe, and be smart!

The SMG-10 is a bolt-action, shell-ejecting blaster inspired by the submachine guns of the 1960's. I designed this blaster with the goal of making a decently powerful blaster that could fit on an A1 mini bed, while still being able to eject shells and fire both printed projectiles or 6mm airsoft bbs. This project uses common M3 hardware, some pen springs and larger springs that will need to be purchased off of AliExpress. 

TEC-THOMPSON Conversion Parts, OUT NOW!

New parts to give your SMG-10 some Thompson SMG flair!

Includes:

• Thompson SMG Style Grip & Stock.
• Longer Barrel Cover & Barrel.
• Angled Handguard.

Build it your way! Lots of different parts to build it how you want

Hardware:

*These springs can be taken from mechanical pens or pencils if you prefer.

** Springs in these exact length will be difficult or impossible to find, I recommend purchasing 305mm Springs with the required wire & outer diameter off of AliExpress, and cutting them to the required length. All my models uses 10mm outer diameter springs with wire diameters from 0.6-1.0 mm, so if you like this one or my other models, I would recommend buying multiples.

OUTER PARTS:

SCREWS:

INNER PARTS:

SPRINGS:

ASSEMBLY:

STEP 1: Trigger System

1. Insert the trigger and secure with an M3 hexnut and M3x25mm Screw.
2. Place one of the 0.5x5x20mm springs into the small, circular pocket in the lower frame.
3. Push the striker latch in and hold it down, secure with an M3 hexnut and M3x25mm Screw.
4. Place two hexnuts into the slots at the back of the lower frame.

STEP 2: Magazine Latch

1. Insert a hexnut into the slot in the bottom of the magazine latch.
2. Make sure the slot for the magazine catch in the lower frame has been cleaned up with a metal file.
3. Place your second 0.5x5x20mm spring into the circular pocket at the end of the magazine latch.
4. Push the magazine latch and spring into the slot in the lower frame.
5. Insert and M3x20mm screw into the hole on the other side. Tighten it so that the magazine catch only moves about 2mm when pressed and released.

STEP 3: Grip and Rear

1. Slide the rear frame onto the back of the lower frame and secure with 2x M3x12mm screws.
2. Slide the Grip onto the rear frame and secure with an M3x23mm screw and hexnut.

STEP 4: Upper Frame

1. Push a hexnut into the slot in the side of the bolt, then slide it into the upper frame.
2. Slide the striker into the lower channel in the back of the upper frame.
3. Insert the 0.8x10x115mm spring into the top channel, and the 0.8-1.0x10x110mm spring into the bottom channel behind the striker.

STEP 5: Upper/Lower Attachment

1. Slide the assembled upper frame onto the lower frame assembly and secure with a M3x30mm screw and hexnut.
2. Attach the charging handle to the bolt with an M3x20mm screw.

STEP 6: Barrel Assembly

1. Insert two hexnuts into each connector piece, then slide them into the slots in the upper frame with the hexnuts facing inwards, towards the barrel.
2. Slide the barrel into the rear of the barrel cover.
3. Attach the barrel and barrel cover to the Upper Frame by sliding it onto the connector pieces and securing with 4x M3x8mm screws.

STEP 7: Foregrip

1. Slide the foregrip onto the lower rails, and secure in the desired position with an M3x23mm Screw and hexnut.

STEP 8: Magazine

1. Push the magazine follower into the bottom of the magazine, followed by the magazine spring and finally the magazine base.
2. Secure the magazine base with an M3x23mm screw and hex nut

FINISHED: