This is a project I had wanted to do for a while, but had to put on the backburner for quite a while because of working on the RBC-9, but once the open beta files for that project were uplaoded I started on this.

Essentially it is a 5.56 cal. Hand-Cranked Belt-Fed Gatling Gun design, but utilizing AR-15 barrels and bolts.

Video of the mechanism without the barrels / bolts installed :: https://www.youtube.com/watch?v=D9TKuIFpxUM&ab_channel=Nopel

Ultimately it won't run as smooth as shown in this video, due to the need to cock the strikers, but it shows how well the delinker can feed

https://www.youtube.com/watch?v=SZnzvZ6RTC4&ab_channel=Nopel

I'd say this prototype version of this project is about 90% - 95% finished, only primary things left to do are iron out some issues with the strikers, and work out some sort of mount. Currently I only have one Bolt, for test firing purposes, before buying the other 5. As you may imagine, buying 6 of everything makes this build get pricey (though still nowhere near the price of buying a tippmann or otherwise lol).

Getting the strikers right is proving a bit harder than I had imagined, as if they are too hard to cock, then the gun feels bad to turn by hand. So the weight of the strikers, spring weights, and travel distance, need to be optimized better, to allow for a smoother feeling function.

Heat buildup will no doubt be an issue in this design. Currently everything has been done in PLA+ for ease of printing, but the components directly holding the barrels will need to be made in some other fashion, likely involving a sandwich of Send-Cut-Send plates, and PA6, but this shouldn't be too hard to implement.

As a quick note -- I would imagine at least a few people will have questions of the legality surrounding this sort of design :: While the numerous ATF definitions and technical letters can be confusing, the ATF letter regarding Tippmann Ordinance's .22 LR Belt Fed Gatling design, is the most similar, and would also pertain to this build as well :: https://tippmannordnance.com/22lr-atf-document/

Its honestly a pretty easy build, not too many parts, but they are all large. Hardest pieces to make are the striker components.

Aye man I had seen your posts about the one you're designing. Please don't stop your peoject on account the one I'm doin lol, yours looks super awesome as well, seems like the way you're doing the internals was more along the lines of a proper gatling with the way you've done your strikers, and overall likely quite a bit different from this one. I started this project cause gatling designs are out of reach for most people in terms of price, so the more home build designs out there that are affordable, the better lol.

As for a 308 version, maybe(?) at some point. It would be quite a bit more expensive of a build than this, with all components being ar10 based. I've got some ideas for what I'd like to do as a next project but they aren't related to this one