Firearm Assembly

Get your soldering iron ready (or dedicated tool if you have it).
As you go along, if any heat inserts "mushroom" while inserting, cut/scrape the excess off with a razor knife so everything remains flush.

1. Handguard: 2x M6, 12x M4 (Both Sides)
   
2. Flashlight: 1x M4
   
3. Stock Plate: 2x M4
   
4. Side Plates: 4x M3 (Short) (Both Sides)
   
5. Upper Receiver: 4x M3 (Long)
   
6. Lower Receiver: 4x M3 (Long)
   
7. Grip: 6x M3 (Short), 4x M3 (Long)
   
8. Foregrip: 1x M3
   
9. BCG Retainer: 2x M3
   

This section will walk you through joining the lower handguard body. You may need to lightly ream the dowel holes for a not-too-snug fit.

1. Insert the 1" 3/16 dowel pins into the corresponding small holes on the LOWER handguard pieces. You may need to lightly tap them in with a mallet or hammer.
   
2. Apply glue/epoxy to the mating surfaces.
3. Close the gap between pieces with a hammer or mallet.
   
4. Slide both parts onto 2020 extrusion.
   
5. Ensure 2020 extrusion is seated all the way to the front of the handguard.

This section will walk you through joining the upper handguard body. You may need to lightly ream the dowel holes for a not-too-snug fit.

1. Insert the 1" 3/16 dowel pins into the corresponding small holes on the UPPER handguard pieces. Both Front and Mid.
   
2. Apply epoxy to mating surfaces and join fully.
   
3. Slide upper handguard onto 2020 extrusion.
   
4. Slide the 2x "gap fillers" into place on the rail. Use epoxy if desired.
   
5. Finally, apply epoxy to mating surfaces and join final handguard part.
   

The side plates are printed in two halves. Since you probably already have the epoxy mixed from the steps above, we'll do this step next.

1. Insert 1" 3/16 dowels into joining dowel holes.
   
2. Apply glue/epoxy to mating surfaces
3. Join with as little glue/gap as possible.
   
4. Follow the steps above for the mirrored side.
   

Let's build the "gun" part. CA residents look away!

1. Insert sleeve bearings into Linkage B
   
2. Use a 3mm dowel to attach Linkage B to Linkage C. They should be able to rotate freely/easily on the hinge pin.
   
3. Slide trigger linkage into lower and fix in place by tapping in 3mm dia, 38mm length dowel.
   
4. Push 4x sleeve bearings into trigger.
   
5. Push trigger down into slot from the top. Be mean to it- it will require a bit of force to slide into place.
   
6. Affix trigger with 3mm dia, 38mm length dowel
   

If you've built an AR before, this will be very familiar.

1. Insert trigger- affix with 1.5" 5/32 Dowel
   
2. Insert hammer - affix with 1.5" 5/32 Dowel
   
3. Make sure the trigger is in contact with Linkage C
   
4. Install the safety plug. Short if using a SS. Long if not.
   

As if you really wanted it to be longer...

1. Insert both retention arms into place.
   
2. Carefully insert spring between retention arms.
   
3. Slide cover into place from the bottom.
   

In another guide, we'll insert some 18650 batteries to this part.

1. Slide nuts into foregrip latch housing
   
2. Insert spring into slot and push in foregrip latch.
   
3. Attach latch with 2x M4 bolts
   
4. Fasten foregrip latch to foregrip body with 1x M4x8 bolt. This bolt will self-tap into the plastic.
   
5. Attach battery door to foregrip body with 1x M3 bolt
   
6. Snap the foregrip pad into place. Note- if you printed this with a rigid material like PLA, this will be a huge pain to remove (FYI in case you're painting this thing)
   

Joining the Grip to the Lower

1. Align the lower with the grip, then slide into place.
   
2. Affix with 6x M3 torx bolts
   
3. Attach grip nub with 2x M3 x 8 bolts
   

This part is a little tricky since you have to compress the spring while tightening the bolt. Once this is complete though, insert a mag release button and test it out. If you feel a ton of resistance or the rod is seized, you probably haven't properly aligned the bolt with the hole in the spring.

1. Insert mag catch rod into slot from front
   
2. Insert spring into slot (from the bottom of the magwell)
   
3. Attach spring to rod with 1x M3x16 bolt. Try to hold the spring flush with the magwell channel.
   

Electrical tape is probably fine, but if you want to be fancy about it...

1. Take the printed gas port cover and slide it onto the barrel. It should be pretty snug. You may need to scale up/down slightly and re-print to get the proper fitment.
   

Attach the trigger to the other trigger.

1. Thread 2x M3 studs into Linkage A. Use red threadlocker or superglue if you used the SCS alunimum parts. The long stud goes on the straight end.
   
2. Slide Linkage A into sleeve bearings, completing the trigger linkage.
   
3. At this point, you should be able to pull the hammer back with your thumb and dry fire to test the trigger mechanism. Don't let the hammer slam into the lower. See the troubleshooting page if you run into functional issues.

Let's attach the barrel to the upper receiver.

1. Slide barrel into place on the Upper. Ensure the "notch" is perfectly centered and facing upwards.
   
2. Press the barrel clamp into place. (Ensure correct orientation)
   
3. Slide the hose clamp through the small slit in the upper, force it to wrap all the way around, and then tighten.
   
4. Make sure the screw terminal of the hose clamp is directly on top of the barrel clamp, not off to the side.

Insert BCG and back plate.

1. Turn the assembly upside down and slide the charging handle adapter into place.
   
2. While still upside down, slide the CMMG bolt carrier into the upper receiver.
3. Using 2x M3x8 and 2x M3x16 bolts, attach back plate to the upper receiver.
   

The worlds weirdest bullpup is formed!

1. Plop the upper onto the lower.
   
2. Use the 1.25" 3/16 Dowel as the front takedown pin.
   
3. Use the quick-release pin as the lower takedown pin. (Inserted from the rear)
   

Use a 1" 3/16 dowel to attach the trigger guard to the grip module. Be careful if you choose to use a hammer to pound these in- the little arms can be fragile.

1. Attach trigger guard
   

The plates retain the stock arms and also the mag release buttons.

1. Set the mag release button ("L") into its slot. It will be loose!
2. If you opted for the metal Linkage A and not the printed one, insert linkage shim into place direclty on top of Linkage A. It should just be loose.
3. Align the side plate with the hooks on the Lower receiver. Push them into the hooks, then force the plates forward to fully seat them.
4. You will hear the stock latch "click" into place when it's seated forward enough.
5. Use 3x torx head screws to affix plate to Lower.
6. Attach the plate decoration to the big plate using 2x torx bolts.
7. 🔁 Repeat the steps above for the right-side button and plate.

For stabilizing, and for pummeling.

1. Attach stock arms to plate with bolts. Bolts will self-tap into plastic.
2. Slide stock bumper onto stock plate.
3. Affix bumper with 2x M? bolts.

This is one of the best parts of the whole rifle.

1. Push the charging handle rod into the charging handle knob. It should be a little below flush on top.
2. Slide the assembly through the rectangular slot in the barrel clamp.
3. Give it a few good (careful!) racks to fully seat the rod into the pusher.

Attach the cheek pad to the upper with 2x M3 bolts.
You will have to slightly bend the cheek pad to snap it into place against the front part of the upper.

This one is a doozy. Go slow, and don't risk stripping the plunger. If you do strip it, you'll have to scrap the grip and start over. Ask me how I know...

1. Use a 5/64" (or 2mm) allen key to drive in the spring plunger most of the way.
2. Push the safety into its hole. If it doesn't fit all the way in, loosen the detent screw.
3. Once the safety is in-place, slowly increment the tightness of the spring plunger until clicking the safety feels right.
4. When completed, snap the safety detent cover into place. Note the "TOP" written on the printed part for orientation. Insert the bottom end in first.

“I Need A Weapon”

1. Slide the front assembly onto the rear assembly. Take care the charging handle doesn't get snagged.
2. Secure with hex bolt. (Hole opposite the safety)

Before firing a single round, its important to check the firearm for the most basic and critical operations.

1. Check the safety
2. Check the charging handle
3. Check the BCG / hammer
4. Check the trigger