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Building a MAC-10/9 from a parts kit and receiver flat: Legality
I'm really interested in building a MAC-10 9mm from a kit and flat, but I can't seem to find any information about how to do this as a closed-bolt semi. Obviously a closed semi bolt is required but are there any other modifications that need to be done to the receiver (from a flat)?
Can I just drop in a semi FCG and bolt and be good to go? |
#2
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I wish I knew..I have a MAC 10 9MM (raw) and it fires from an open bolt.
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May the Bridges I burn light the way. Life Is Not About Waiting For The Storm To Pass - Its About Learning To Dance In The Rain. Fewer people are killed with all rifles each year (323 in 2011) than with shotguns (356), hammers and clubs (496), and hands and feet (728). |
#4
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Jack Do you want an AOW or C&R SBS/SBR in CA? No posts of mine are to be construed as legal advice, which can only be given by a lawyer. |
#6
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So there's no lower receiver differences between FA and SMG? And is it okay to use an SMG kit for parts and a newly manufactured closed bolt and semi FCG? I don't see many dedicated semi kits, I assume because you can buy semi MACs (no need for a kit). I would far rather build from a kit and have something "classic", and the fun of bending and welding a flat! I'm going to need a few flats for the first two I will no doubt mess up haha.
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#7
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right, an SMG is FA. And an open-bolt semi receiver is basically the same as the FA/SMG receiver. A closed-bolt SA receiver is different.
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Jack Do you want an AOW or C&R SBS/SBR in CA? No posts of mine are to be construed as legal advice, which can only be given by a lawyer. |
#8
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Ack sorry, meant "different between SMG and SA". As I understand it, open bolt semis are NFA items, so I would need to go closed bolt. But is the closed bolt receiver different from the SMG/open bolt semi? None of the flats I'm looking at online seem to specify one way or the other and I don't know what to look for to determine which is which.
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#9
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I realize, I just want to do it myself. I have seen a few closed bolt semi upper kits, but they seem to be far rarer than the SMG kits, again I assume because people buying closed semis are doing so as complete guns, so there's not a lot of demand for receiver-less kits. I'm just looking forward to building it up myself, and replacing parts would actually be fun as part of the project just to see what does what. The MAC is a pretty simple gun, but when I'm done I want to feel like I "made" it, not just lego'd it together.
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#10
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yes, the closed (CB) bolt semi receiver is different than the SMG/open bolt semi. the FCG has a different bolt pattern. If you find a flat, it must be a CB semi flat.
If you buy the weld-together receiver, the side plates must be undrilled or drilled with the CB hole pattern. The lower section of the receiver in the weld-together kit is interchangable between CB and OB/SMG. the weld kit with the grip and trigger guard is interchangable.
__________________
Jack Do you want an AOW or C&R SBS/SBR in CA? No posts of mine are to be construed as legal advice, which can only be given by a lawyer. |
#11
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Ohh, that makes way more sense. Are there diagrams I can use? Is there a proper name for those stick-on guides for receivers that show where to drill the cb holes, etc?
e: The flats I'm looking at are literal "flats" with no holes, which means they have to be drilled for the cb semi action? |
#12
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__________________
Jack Do you want an AOW or C&R SBS/SBR in CA? No posts of mine are to be construed as legal advice, which can only be given by a lawyer. |
#14
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If you can find the pre-drilled sideplates that you weld to the center section, that might be easier. Are you more interested in an Mac-10/9 vs an M-11/9. If you aren't stuck on a Mac-10/9 you might want to look around to see what kits are available for the other types yup, or email them. I emailed both companies and got the basic info I needed before I picked up the phone and did a package deal for some kits.
__________________
Jack Do you want an AOW or C&R SBS/SBR in CA? No posts of mine are to be construed as legal advice, which can only be given by a lawyer. |
#15
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The side plate weld-up kits I've seen don't have any holes, but I assume that's just so you can use them for whatever. I guess in theory if you had a registered receiver SMG you could repair it with them. Just to clarify: It is NOT legal to do an open-bolt semi, right? And the only ones available are grandfathered, considered machine guns, and now NFA items, correct? |
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__________________
Jack Do you want an AOW or C&R SBS/SBR in CA? No posts of mine are to be construed as legal advice, which can only be given by a lawyer. |
#17
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Okay, cool, that's what I sussed out, but it's weird that there isn't some good repository of non-NFA (or both) MACs out there. I assume subguns would be offended just at the idea of building a CB SA MAC
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#20
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Do you mean a real MAC 10 or an M11/9? The MAC 10 has a fixed firing pin and only fires from an open bolt. The M11/9 has a floating firing pin and a hammer. .
__________________
Be sure to ask your doctor if depression, rectal bleeding, and suicide are right for you. In the United States a person's expertise on a subject is inversely proportional to their knowledge of the subject: The less they know about something, the more they become an expert on it. I am being held hostage in a giant insane asylum called Earth. |
#21
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Whoah, thread resurrection! M11/9, I was curious about what needs to be done to adapt a MAC 10 kit for a closed semi bolt and if that requires modification to the receiver (like the "blocking bar" used in semi Uzi kit builds).
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#22
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I didn't notice that. Someone before me bumped the thread. .
__________________
Be sure to ask your doctor if depression, rectal bleeding, and suicide are right for you. In the United States a person's expertise on a subject is inversely proportional to their knowledge of the subject: The less they know about something, the more they become an expert on it. I am being held hostage in a giant insane asylum called Earth. |
#23
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No problem, I'm still interested in the prospect
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#24
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Keep in mind that if you are attempting to do this now (post 01-01-2015), then, in order to be CA legal, it needs to be built as a dimensionally complaint (minimum 6" barrel length + minimum 10.5" overall length) bolt-action single-shot pistol or as a dimensionally complaint (minimum 6" barrel length + minimum 10.5" overall length) break-top/open single-shot pistol.
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#25
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But he did build it before 01-01-2015 .
__________________
Be sure to ask your doctor if depression, rectal bleeding, and suicide are right for you. In the United States a person's expertise on a subject is inversely proportional to their knowledge of the subject: The less they know about something, the more they become an expert on it. I am being held hostage in a giant insane asylum called Earth. |
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