A skin, not a craft: the Space LR-300 is an LR-300 wearing a new look, and since nobody crafts the LR, every Space LR is a looted one. The bill is the LR's.
Read the LR-300's price tag and you have read this one. The Space version has no blueprint of its own: it is the LR-300 with a skin on it. And because the LR itself can't be crafted or researched, every Space LR on a server is a looted LR-300 with the look. Owners of the skin can put it on one at a repair bench; the rows, recycler yield included, stay the LR's.
So treat one in your box like any LR: keep it for the player who shoots it well, recycle the spare. A worn one gives back a burst module and a coin flip on a rifle body, worth more to an AK crafter than a second LR in a fancier coat.
Questions
Space LR-300 Assault Rifle ×10: how many resources?
High Quality Metal ×400, Burst Module ×20, Metal Spring ×20, Rifle Body ×10.
Which workbench does Space LR-300 Assault Rifle need?
Workbench level 3.
How long does Space LR-300 Assault Rifle take to craft?