Squoosh- top prime double stack squish remix

19th Apr 2026:

New optimized ram designs for slightly higher added- Use high flow ram for 788 springs, use standard new ram in case you want a more sturdy ram. Both should work fine for 788 springs.

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A relatively low hardware top prime double stack squish remix. Tested with 788 spring (140-150  150 fps).Uses moose ds mags. Please treat the files as beta release and may be changed in the future.

Hardware required:

for the mag release: 1x m3 14mm and 10mm length of 4mm spring

2xm3 186mm threaded rods (goes in the bottom holes connecting front body and the other body pieces), 

1xm3 330mm threaded rod (goes in the top hole connecting muzzle and all the body pieces)

127mm 35-38 plunger tube

2x 30mm (ID)-35mm (OD) and 1x 9mm(ID)-13mm(OD) orings for the ram, 1x 30-35 oring for the plunger 

18-19 coils of 788 spring (k25 will give better fps but will feel harder to prime)

18 cms of 13mm (id)-16mm(od) barrel (bigger barrel will increase fps)

Front muzzle:

• 1xM3 nut to secure the m3 threaded rod

• two m3 heat inserts to secure the top rail and slide rail

• four m3x8 or mx10mm bolt or screws to secure the front body to the muzzle

Front body:

• two m3 heat inserts for securing slide rail

• two m3 nuts for securing the m3 threaded rods

Mid body:

• one m3 heat inserts for securing slide rail

Back body:

• one m3 heat insert for securing the back rail

• three m3 heat inserts for securing the back plate

Back plate:

• three m3x10mm bolts for securing the back plate to the back body

Spring guide and Spring cap:

• 1 ball detent 6-7mm (same as squish)

• 1 m3 heat insert

• 1m3x8 bolt 

6xm3x6mm bolts for securing the front,slide and back rails.

2x m3 20mm for securing the trigger and sear to the frame. 3mm elastic cord to tension the trigger and sear.

1x m3 15 or 12mm bolt to secure the priming bar to the ram. If you use the 15mm bolt, don't screw it all the way in.

2x m3 20mm bolt to secure the slide crew stop, slide and the priming bar. Dont over tighten these. 2x M3 12mm to secure the handstop to the slide. 

Printing and assembly instructions:

1) front body and frame would need some supports.

2) front body has two pockets for receiving m3 nuts: 

when screwing in the m3 rods into the front body, please ensure that the rods don't go too far into the magwell. Otherwise this will interfere with the mag.

3) The elastic cord goes through the sear, trigger and frame:

Thanks to Moose's discord group for all the suggestions and support. Name proposed by Voidheart studios.