I ended up having to abandon this print after completing the two uppers, lower receiver, and grip. The reason: When I started to dry-fit the parts, I noticed that there seemed to be quite a bit of the internal structure missing. I understand that it is a static "wall hanger," but the parts just did not seem to have enough "body" to really be assembled. Looking at the fully assembled STL that was included, albeit it was EXTREMELY small compared to the rest of the parts, even the original poster admitted they were about 12% off scale. What we could call the bolt carrier was not included in the separated parts. Trying to eyeball scale that one part proved to be a bit of a challenge, as it didn't scale properly to fit with the already printed parts. Even trying to scale up the assembled STL and then breaking it into the individual parts was not working out. Not being a real fan of the SCAR, I found that it just wasn't worth the effort. MAYBE a revisit when I have more time and gumption. I would add, that when fully scaled, this would most likely be the 7.62mm SCAR-H version rather than the 5.56mm SCAR-L. Props to the OP for attempting to add this one to the collection. But it DOES need quite a bit more work before it is truly print-worthy, especially when EVERY part needs to be run through the repair stage to become manifold.