Modular Mlok handguard with 4 slots for the Mosquito Airosft Kit Beta 2 (229mm barrel)

Update May-20, 2024: Fixed a problem with the extralight handguard that caused printability issues.

0.2mm layer height, 0.4mm line width (or whatever is your slicer defaults to for 0.4mm nozzles) reccommended. Brim may be needed.

This is an even longer mlok handguard remixed from Miki's design that can fully cover a 229mm barrel. I've split it into a two-piece design to save on build height and further increase modularity. You can now design your own handguard and mate it to Miki's excellent hopup system. Adhesion to print bed has also been increased.

There are two main versions:

The 229mm is 201mm tall, and offers full tracer compatibility with a 229mm inner barrel.

The 218mm fits is 190mm tall and fits on more printers. This version needs the included muzzle to fully encase a 229mm barrel, the max barrel length for tracers is 218mm.

Each version has three variants: standard, light, and extra light. Standard offers max durability, light is strong enough for most cases, extralight trades strength for that last bit of weight savings. Rails and handguards of the same length are all cross compatible with each other, mix and match to your liking.

Muzzle A sits flush with the inner barrel, muzzle B is protrudes a bit more and has an extra ring to guard the inner barrel from dirt and mud.

The required hardware is as follows:

• 5x M3x5-6 socket cap screw
• 4x M3x16 socket cap screw
• 9x M3 hex nut
• 1x M3x8 counter sunk screw
• 1x M5x10-12 hex head bolt
• 1x M5 nyloc nut
• (optional) 1x M3x25 or longer screw
• (optional) tweezers

It may be tough installing 8 of the 9 M3 nuts into the handguard. My process is as follows:

1. Put the nuts onto the indents
2. use the long m3 nut, carefully thread it into the nut. Gravity and geometry should be enough, if not tweezers may be used.
3. Pull the nut into place. Friction should hold them in place.

The octagon under the handguard is the only place you'll need support. I've printed my files with 4 perimetres and 1.2mm minimum thickness for the top and bottom, this is enough for my standard 218mm to tank BBs from reasonable distances with CF-PETG. You may adjust these settings to your own liking.

The included front housing replace 5_Front_Housing in the Mosquito. You bolt it onto the handguard before installing the assembly into the receiver. The old set screw in the hopup unit is replaced by the M5 hex bolt. I made the pin holes quite tight, let me know if they turn out too tight for the 3mm pins.