Ghost Gunner and MPCNC Possibilities

New Home Forum Mostly Printed CNC – MPCNC Advice – MPCNC Ghost Gunner and MPCNC Possibilities

This topic contains 23 replies, has 9 voices, and was last updated by  Justin 1 week, 2 days ago.

Viewing 24 posts - 1 through 24 (of 24 total)
  • Author
    Posts
  • #101197

    Mike
    Participant

    While I don’t own a firearm, I’ve always been intrigued by the incendiary topic of Ghost Gunner. Basically, they sell a CNC machine ($2K)  for a private US citizen (in most areas) to legally finish producing their own firearm by milling the last 20% of an 80%-complete “lower” of an AR15 (and you buy the other pieces of the assembly for a full-working model). They, of course, sell the 80% lowers made of 7075 billet aluminum. I know very little about weapons, but I gather the “lower” is what’s needed to tie all the other purchasable pieces together and make a working unit. Evidently, this dodges some sort of regulation, but I haven’t reviewed the legalese on what that exactly is.

    So, has anyone looked into and/or knows the trade well enough to know if the MPCNC (probably a smaller one) can operate at the tolerances required and leverage the digital files to finish producing the “lower”?

    EDIT

    We’ll I didn’t exactly do a lot of research, but after looking at a few videos the milling apparatus is oriented to a different axis than a MPCNC, so I imagine there would be a lot of pain/trial/error getting that to work. Looks like a no go.

    • This topic was modified 1 month ago by  Mike.
    #101201

    Mike Atencio
    Participant

    My understanding is the MPCNC can mill aluminum in very close tolerances but if you’re talking full auto, I can strongly suggest don’t unless you want to stay in prison for a big number of reasons. http://www.CNCCookbook.com has a slew of info and videos to walk you through the milling process. I have seen what appears to be a little chatter in the video where they made a small plastic injection die of an AR15. It was phenomenal in detail but, it needed to be polished to a mirrored shine. I think the MPCNC could, if you spent years fine tuning your skills. You’d be better off buying the gun semi-auto and leave it at that.

    These workarounds you see change state to state but on the Fed level, they are totally prison time. Gunsmiths need all kinds of licensing to make what you’re talking about. It would be cool but not if you get caught…

    I hope this helps.

    1 user thanked author for this post.
    #101202

    Mike
    Participant

    Thanks for the cautionary advice. BTW, nothing about this is in regard to full-auto or the desire to do so. This is about manufacturing a legal firearm adhering to all federal regulations (not about circumventing laws, etc). I have no interest in joining those folks in the clink, but rather guarding myself and family from those recently lodged (or will be by their own foolishness) there.

    EDIT

    Oh, and seriously….where’s the fun in buying one? Most folks on this forum are likely about making something, whether they need to or not.

    • This reply was modified 1 month ago by  Mike.
    • This reply was modified 1 month ago by  Mike.
    #101203

    kd2018
    Participant

    I’ve seen guys mill out 80% with a jig and a hand drill. IF your bit can reach the depth it needs I wouldn’t worry about having enough precision.

    • This reply was modified 1 month ago by  kd2018.
    • This reply was modified 1 month ago by  kd2018.
    1 user thanked author for this post.
    #101214

    kd2018
    Participant

    Evidently, this dodges some sort of regulation, but I haven’t reviewed the legalese on what that exactly is.

    The lower is the part of the gun that has to be stamped with a serial number when you buy from a manufacturer. If you make your own lower then you can legally piece together a gun without a serial number… (Texan here. But you might want to check your local jurisdiction.)

    2 users thanked author for this post.
    #101215

    Mike Atencio
    Participant

    I’m an ex-cop that’s white living in an all black neighborhood. I don’t have anything except a Remington 1100 12 G auto that’s sawed off and pistol gripped. It’s choked too to create a smaller group pattern at close range – like inside my house.  All the people know me. I’ve arrested some, ticketed others and more than once helped many of their families after I did so. Still, I’m not prone to taking chances. First round is rock salt, after that, it’s lead. And ammo is way cheaper. 🙂

    #101221

    Barry
    Participant

    I wouldn’t try it.  The lengths you’re going to need aren’t going to work well with the mpcnc.  At most for aluminum we’re running out of rigidity at around half, to three quarters of an inch(tool length).  After that it’s going to be chatter city.

    2 users thanked author for this post.
    #101224

    kd2018
    Participant

    Kind of a funny coincidence, this guy is doing it by hand with a jig with what looks like a DWP611

    https://www.youtube.com/watch?v=U9zio3k3eVk

    But yeah, you gotta reach DEEP!

    • This reply was modified 1 month ago by  kd2018.
    1 user thanked author for this post.
    #101228

    Erwin Vigilia
    Participant

    But yeah, you gotta reach DEEP!

    That “drop it in at an angle” approach is SCARY!!!!

    #101251

    Barry
    Participant

    But yeah, you gotta reach DEEP!

    That “drop it in at an angle” approach is SCARY!!!!

    That’s why I think the mpcnc won’t work for this.  That end mill is waaaaaay too long for our machine.

    #101257

    Mike Atencio
    Participant

    Yup, that looks real scary. Deep and scary.  Maybe a better router? A longer endmill?. Scary. I’ll  stick with the 12 guage.

    #101259

    kd2018
    Participant

    Don’t forget a tornado knife belt for backup!

    • This reply was modified 1 month ago by  kd2018.
    #101291

    Barry
    Participant

    He cut himself towards the end pretty good.

    #101298

    Geoffrey
    Participant

    You can get one for $30, here in ND my local FFL will run the required paperwork for an additional $20.

    https://palmettostatearmory.com/psa-ar-15-approval-15-stripped-lower-receiver.html

    I believe the 80% lowers are more expensive, not to mention the jig required.  I get that it’s cool to have an untraceable home manufactured rifle, but it’s lots more money.

    #101314

    Barry
    Participant

    You can get one for $30, here in ND my local FFL will run the required paperwork for an additional $20.

    https://palmettostatearmory.com/psa-ar-15-approval-15-stripped-lower-receiver.html

    I believe the 80% lowers are more expensive, not to mention the jig required. I get that it’s cool to have an untraceable home manufactured rifle, but it’s lots more money.

    But then the man knows I have guns!!!!  🙄

    1 user thanked author for this post.
    #101324

    Dui, ni shuo de dui
    Participant

    What a moronic idea.

    I love the US and I’d love to live there at some point, but there’s just way too many war weapons in the hands of any random idiot. Super scary.

    Those guys will likely damage our hobby at some point, let’s hope there wont be any major incident or we might see more and more constraints on what we can and what we cannot do in the homeshop.

    1 user thanked author for this post.
    #101335

    BoostWillis
    Participant

    If you don’t live in a free state, then you may need to check your local laws. Otherwise everything said here is perfectly lawful (and quite fun). AR lowers are cheap and easy to print. You can find several different models in the FOSSCAD repo on GitHub. As others have mentioned, the limiting factor of the MPCNC is stick-out, which makes the deep pocketing operations like for the trigger pocket more dicey.

    Fortunately there are other ways of skinning this particular cat.

    One idea that I’ve been toying around with is splitting the lower in half, milling each side, and then bolting them back together like this. This would mean milling from 0%, and both sides would fit on a 9″x6″x0.75″ piece of bar stock. Keep in mind this is an early concept, and the buffer tower would likely have to be made its own piece in order to maintain strength when reassembled.

    And of course there is also the already existing Bolt-together AR lower concept, which should be significantly closer to this machine’s capabilities.

    Personally, I’m a big fan of this machine and intend to continue to explore its usefulness in amateur gunsmithing. To that end, a much simpler project in Aluminum like the FreeMenDontAsk Glock 17 Rail inserts would probably be a good starting point (and where I intend to start as well).

    #101344

    kd2018
    Participant

    1 user thanked author for this post.
    #101409

    Mike Atencio
    Participant

    I needed that good laugh. Thanks.

    #101416

    Mike Atencio
    Participant

    That was my thought as well. If someone isn’t using the gun for illegal activities, who cares if it has a serial number. The hobby is cool but it takes one knucklehead and a lot of people die. I found that I am really uncomfortable with making these things – legal or not. We have enough crazies with assault weapons without adding unregistered guns to the mix. I like to build guns – percussion cap black powder rifles, pistols, and cannons but I think this assault rifle activity is a bridge too far. Just my take on it.

    #101418

    Mike Atencio
    Participant

    I like that Glock in the video but the guy’s Twitter page was taken down. Can’t contact him. Got any info about the plans and parts?

    That’s what I used in law enforcement. I sold it and really wish I had it now. I got the tools to make it so why not. Any help would be great.

    #101421

    Barry
    Participant

    I like that Glock in the video but the guy’s Twitter page was taken down. Can’t contact him. Got any info about the plans and parts?

    That’s what I used in law enforcement. I sold it and really wish I had it now. I got the tools to make it so why not. Any help would be great.

    https://fosscad.org/

    1 user thanked author for this post.
    #101424

    Mike Atencio
    Participant

    Thanks. Got it.

    #103522

    Justin
    Participant

    I’ve actually done a few 80% lowers with a drill press, hand router and jigs, they came out well but AR lowers are so cheap now it’s not really worth it in my opinion.

    I’m still building my MPCNC so I don’t have any experience with it yet but I would think if you can do one with a hand router it would be somewhat possible to do with the MPCNC. Especially if you milled out the majority with a drill and just did the finishing with the CNC.

    • This reply was modified 1 week, 2 days ago by  Justin.
Viewing 24 posts - 1 through 24 (of 24 total)

You must be logged in to reply to this topic.