ATROX Picatinny Rail PDW Chassis

*IMPORTANT NOTE: This requires what I believe is the latest version of Atrox's optic mounting plate, which is flat and has 4 mounting holes. Although I prefer the older version with the 2 raised threaded bosses, it DOES NOT WORK with this mod!

**This mod uses the stock longer threaded barrel for support and cannot be installed on the shorter flush barrel.

***Pictured stock is not included. There are plenty of printed and Airsoft stocks available.

****I rushed my own install and forgot to keep track of what lengths I used. I'm double checking the types and lengths of the various screws, in the meantime BOM is WIP.

BOM

6x M3 nuts

2x M3x16mm button head screws to attach "Back Rail" to "End Cap"

1x M3x16mm button head or socket cap screw to attach "Top Rail "B" to "Back Rail"

2x M3x16mm countersunk screws to attach "Top Rail A" to "Muzzle Attachment"

1x M3x30mm socket cap screw to attach "Muzzle Attachment" to "Muzzle Nut"

1x M3x12mm screw to attach "End Cap" to the Atrox lower

2x M3x10mm countersunk screws to attach "Top Rail B" to Atrox optic plate

Installation is a bit of a matryoshka doll affair. I opted for more hardware and pocket nuts in return for simpler and more consistent printed parts.

a. Press M3 nuts into the following pockets, make sure all are fully seated. Fit may be snug or tight depending on print tolerances.

b. Insert "Muzzle Nut" into the gap in front of the Atrox LED front sight with the nut towards the back.

c. Remove orange barrel sleeve, and slide "Muzzle Attachment" over the barrel. Attach this to "Muzzle Nut" with 1x M3x30mm socket cap screw.

d. Use 2x M3x16mm button head screws to attach "End Cap" to "Rear Rail", making sure that the rectangular nut pocket in "Rear Rail" is oriented up.

e. Remove the short M3 screw from the rear-bottom of the Atrox lower, just behind the grip. Don't lose this screw.

f. Slide "End Cap" over the back of the Atrox and loosely screw in 1x M3x12mm button head screw (snug at the end after all the others steps, not too tight).

g. Use 2x M3x16mm countersunk screws to attach "Top Rail A" to "Muzzle Attachment", and gently press the round tab at the back of "Top Rail A" into the receptacle at the top-front of "End Cap".

h. Use 2x M3x10mm screws to attach "Top Rail B" to the Atrox optic mounting plate, with the screws going through and sandwiching "End Cap".

i. Screw in 1x M3x16mm button head or socket cap screw through the rear hole in "Top Rail B" into the pocketed nut inside "Rear Rail"

Enjoy!