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Posted: 1/6/2024 3:13:46 PM EDT
| I just f]got my SOT2 and I am a 07 FFL and looking at building a DIAS for some RD. I have tried to find out exactly what type of lower i need to mill out to support the DIAS. I know its a low shelf but what are those dimensions, I am assuming the pocket is a AR-15 and not M16. Also, I am assuming I need the M16 trigger and safety for a FA FCG correct? |
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Originally Posted By Ryo: You can use a M16 FCG. I like Geissele SSF. It is much easier and cheaper to make your own M16 by drilling one hole and adding a sear. There are jigs to help align but you have to send them your FFL before they sell those to you. I agree it seems like a RR would be easier to make. If you do go the DIAS route is there a legal issue when you remove the DIAS? Cant the semi auto host still function as a MG? It would have a M16 BCG, trigger and selector. If you flip the selector to full auto there won’t be a sear to hold/release the hammer, which means you could get hammer follow. I’m not saying it’s safe but it could in theory shoot full auto. |
"I prefer dangerous freedom over peaceful slavery". - Thomas Jefferson
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Unless you really need a DIAS specifically for testing, it is much easier to buy some Anderson FA pocket lowers and just drill a hole. Heck, you don't even have to do any engraving anymore. KAK has the best deals I've seen on standard M16 LPKs. Get a dealer account set up with them. I also bought some from midsouth before I saw KAK offered them for cheaper. Cryostructure offers a great drilling jig for a good price. |
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Originally Posted By Ryo: No engraving? You are still required to engrave it with your info, including a serial #. No, you aren't. Manufacturers are now exempt from having to mark existing firearms that have never been in an individuals possession. And you could definitely use the existing serial number even before they made the exemption. I can buy an Anderson m16 cut lower from anderson, drill the sear hole, and file a form 2 without having to do any engraving. Edit to add: https://regulations.atf.gov/478-92/2023-01001#478-92-a-4-iii |
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I'm an FFL/SOT also and have both post receivers and DIAS. I have an MGI lower that is a postie that I use the most with all the different magwells.  I don't have a magwell for the small frame Glock lower for the CMMG RDB system so a DIAS makes sense so I can sell the lower later if I want to or get around to making a small frame MGI Glock lower. Same goes for other special lowers like Scorpion magwells or DPMS GII etc.. Would rather use a DIAS so I can sell the unmodified receiver later |
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Originally Posted By amphibian: I'm an FFL/SOT also and have both post receivers and DIAS. I have an MGI lower that is a postie that I use the most with all the different magwells. https://c3junkie.com/wp-content/uploads/2020/03/magwells-1024x768.jpg I don't have a magwell for the small frame Glock lower for the CMMG RDB system so a DIAS makes sense so I can sell the lower later if I want to or get around to making a small frame MGI Glock lower. Same goes for other special lowers like Scorpion magwells or DPMS GII etc.. Would rather use a DIAS so I can sell the unmodified receiver later Makes sense for those specific circumstances. I have one as well just in case I need it for something like that, and have other DIAS or packs I've made for different posties. |
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Originally Posted By truckeic: I just f]got my SOT2 and I am a 07 FFL and looking at building a DIAS for some RD. I have tried to find out exactly what type of lower i need to mill out to support the DIAS. I know its a low shelf but what are those dimensions, I am assuming the pocket is a AR-15 and not M16. Also, I am assuming I need the M16 trigger and safety for a FA FCG correct? I use an unmodified Aero lower with my DIAS, fits beautifully, you could bed the DIAS with some epoxy if you wanted for a really snug fit. Add a FA selector, hammer, trigger & disconnector plus a FA carrier and you're done. |
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Originally Posted By amphibian: I'm an FFL/SOT also and have both post receivers and DIAS. I have an MGI lower that is a postie that I use the most with all the different magwells. https://c3junkie.com/wp-content/uploads/2020/03/magwells-1024x768.jpg I don't have a magwell for the small frame Glock lower for the CMMG RDB system so a DIAS makes sense so I can sell the lower later if I want to or get around to making a small frame MGI Glock lower. Same goes for other special lowers like Scorpion magwells or DPMS GII etc.. Would rather use a DIAS so I can sell the unmodified receiver later It is your choice, but there has been a change in thought. It used to be that if a manufacturer gave up their SOT, they could only sell their Post Samples with a demo letter from the buyer. If no letter, the Post Sample receiver would need to be destroyed. Now, if a SOT gives up their SOT, they can sell their Post Samples to a SOT without a demonstration letter. This has given additional market value to Post Sample machineguns being sold by SOT holders giving up their tax status. OP, if you prefer a DIAS, go for it. But whatever you decide, Post Sample machineguns have more market value than the parts set. Good luck with the project. Scott |
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Originally Posted By SGT-Fish: Unless you really need a DIAS specifically for testing, it is much easier to buy some Anderson FA pocket lowers and just drill a hole. Heck, you don't even have to do any engraving anymore. This. But if OP needs a DIAS lower, he needs an Colt/SP1 shelf lower. |
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Originally Posted By canon3825: It used to be that if a manufacturer gave up their SOT, they could only sell their Post Samples with a demo letter from the buyer. If no letter, the Post Sample receiver would need to be destroyed. Now, if a SOT gives up their SOT, they can sell their Post Samples to a SOT without a demonstration letter. It has always been that way. Just was not well known. Scored a lot of posties before it became well known and prices skyrocketed. |
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Originally Posted By RenegadeX: It has always been that way. Just was not well known. Scored a lot of posties before it became well known and prices skyrocketed. Originally Posted By RenegadeX: It has always been that way. Just was not well known. Scored a lot of posties before it became well known and prices skyrocketed. Originally Posted By SGT-Fish: Yep. Always been that way. It just wasn't exploited the way it is now Thank you for the history lesson guys. Scott |
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