Armory Sponsor
Lima Six Belt fed AR15 Build Thread (Page 6 of 91)
|
Originally Posted By Media_Noche: Looks like Del-Ton make a LIMA AR pistol. Not sure if they'd have a problem with you using that name (if marketed as such). Damn, that kinda sucks. Well the name isnt exactly the same since mine has the -6 at the end, and they arent competing products. Might be okay. |
|
Originally Posted By Type7SOT: Damn, that kinda sucks. Well the name isnt exactly the same since mine has the -6 at the end, and they arent competing products. Might be okay. Originally Posted By Type7SOT: Originally Posted By Media_Noche: Looks like Del-Ton make a LIMA AR pistol. Not sure if they'd have a problem with you using that name (if marketed as such). Damn, that kinda sucks. Well the name isnt exactly the same since mine has the -6 at the end, and they arent competing products. Might be okay. Hell, hit them up and explain what you’re doing. I think Del-Ton actually manufactures parts for their DTI line and others. Might be able to get them into the fabrication process. |
|
Originally Posted By Type7SOT: Damn, that kinda sucks. Well the name isnt exactly the same since mine has the -6 at the end, and they arent competing products. Might be okay. I doubt you (or they) could obtain a trademark on the name "Lima" or any of the other NATO phonetic alphabet names, whereas "Lima-6" would be maybe with the dash and number as part of the name. I'm no expert by any means, just a guy that reads. Its the sort of thing you'd want a lawyer for if you're going forward with it commercially. |
"Kid you're so lost, even I can't bring you home" - The North Star
Joined:
Sep 2024
Posts:
4
EE: 0% (0)
MT, USA
| I'm not sure that assembling a few kits for your buddies on a backwater Tibetan basket weaving forum counts as "commercial." Maybe as things ramp up, if production or batch quantities exceed the scope of this forum, but that seems to be almost a secondary consideration at this point. I do hope this destabilizes the current MCR stranglehold on belt fed uppers, and create competition in the niche, but layering up seems like it is closer to that point than current prototyping. |
| According to the machine shop, the upper receiver will be done tomorrow. So I'll be able to assemble the upper receiver and top cover with the rest of the gun and see what it looks like assembled. That will be an awesome milestone. |
|
Originally Posted By Type7SOT: According to the machine shop, the upper receiver will be done tomorrow. So I'll be able to assemble the upper receiver and top cover with the rest of the gun and see what it looks like assembled. That will be an awesome milestone. 
|
|
Attached File Edit: I sure hope this is gonna work lol |
|
Originally Posted By Elcunning: Outstanding! I can't wait. What is the situation with the barrel? Will it be quick change? Its a standard ar15 barrel, non quick change at the moment. I need to get the feed mechanism fully figured out and tested before messing with a quick change barrel. To make a version with a quick change barrrl, it would just be a change to the upper receiver. The top cover, BGC, and the rest of the internal parts are the same. Point being, you could "upgrade" to a quick change barrel by swapping the receiver. I will probably offer it both ways and allow the user to upgrade if desired down the road. |
|
Originally Posted By NWRed: Where's the charging handle? Charging handle screws directly onto the bolt carrier like on a side charging ar15. The slot on the right of the receiver is a combination charging handle slot and ejection port. You'll notice its narrower than a standard ar15 ejection port, this is okay because it ejects out at 90 degrees rather than slighly elevated on an ar15. Edit: the charging handle is not shown in the recent pictures. |
|
That is looking outstanding. The one I have been working on is for 300blk. And it is more of a one off, just for me to play with. One of the problems I have been trying to figure out is how to be able to shoot varying bullet types, because there can be some significant OAL with 300blk depending on bullet. Most belt feds I have used/seen or with the M1919 I own, OAL has to be specific, or you have to use a spacer of some kind. My M1919 is in .308. If I want to shoot cast bullets I have to use a cartridge spacer I made at the front of the feed tray to keep things lines up, which also works If I want to shoot blanks. For my project I am trying to figure out if designing the feed tray so that it keeps things lined up using the cartridge rim is feasible. |
C co 2/325th AIR 91-96 11B1P
Father of 6 un-socialized homeschoolers and grandfather to 2 awesome little boys.
Father of 6 un-socialized homeschoolers and grandfather to 2 awesome little boys.
|
Originally Posted By garyd: That is looking outstanding. The one I have been working on is for 300blk. And it is more of a one off, just for me to play with. One of the problems I have been trying to figure out is how to be able to shoot varying bullet types, because there can be some significant OAL with 300blk depending on bullet. Most belt feds I have used/seen or with the M1919 I own, OAL has to be specific, or you have to use a spacer of some kind. My M1919 is in .308. If I want to shoot cast bullets I have to use a cartridge spacer I made at the front of the feed tray to keep things lines up, which also works If I want to shoot blanks. For my project I am trying to figure out if designing the feed tray so that it keeps things lined up using the cartridge rim is feasible. Thanks, and good luck with your build! Do you have any pics? |
|
This is awesome. And personally, I much prefer to use non-qd, standard AR barrels and handguards, than QC barrels. If I get one (and hopefully I will be able to buy one) it will be used on a full auto lower and I can replace burnt out barrels for 50 bucks rather than worry about finding proprietary barrels. |
|
Originally Posted By SGT-Fish: This is awesome. And personally, I much prefer to use non-qd, standard AR barrels and handguards, than QC barrels. If I get one (and hopefully I will be able to buy one) it will be used on a full auto lower and I can replace burnt out barrels for 50 bucks rather than worry about finding proprietary barrels. That's a great point. And the whole point of this is to make it affordable, that includes total cost of ownership and not just the initial purchase. There are plenty of belt feds out there with non removable barrels and they do just fine if you aren't dumping back-to-back belts with no cooling in between. But again, I want to offer it both ways, and allow the ability to upgrade from fixed barrel to detachable. With the detachable barrels I would love to figure out a way to use standard AR15 barrels. I think it's possible. By the way, I just had an oh-shit moment with my design.  I assembled everything with the 3D printed BCG, and measured the travel. To my surprise, it was only 1/4" longer than normal travel  . I completely panicked and tried to figure out where I went wrong, started stripping everything down and measuring things. I started tearing apart a regular AR15 and measuring things as well, and nothing made sense.Then I realized, when you put an AR10 buffer (~3/4" shorter) in an AR15 buffer tube with an AR15 recoil spring, the coils of the spring bottom out before the buffer hits the rear of the buffer tube. All I need to do is get a flat-wire spring and it should fix the issue. 
|
|
Originally Posted By Type7SOT: Thanks, and good luck with your build! Do you have any pics? Here are a few. Obviously not anywhere as far along as yours.Attached File Attached File Attached File Attached File |
C co 2/325th AIR 91-96 11B1P
Father of 6 un-socialized homeschoolers and grandfather to 2 awesome little boys.
Father of 6 un-socialized homeschoolers and grandfather to 2 awesome little boys.
|
Attempting a QC barrel but may abandon that for fixed. Attached File Attached File Second bolt carrier. First one was a completely different design and a complete failure. Attached File |
C co 2/325th AIR 91-96 11B1P
Father of 6 un-socialized homeschoolers and grandfather to 2 awesome little boys.
Father of 6 un-socialized homeschoolers and grandfather to 2 awesome little boys.
|
Originally Posted By Type7SOT: That's a great point. And the whole point of this is to make it affordable, that includes total cost of ownership and not just the initial purchase. There are plenty of belt feds out there with non removable barrels and they do just fine if you aren't dumping back-to-back belts with no cooling in between. But again, I want to offer it both ways, and allow the ability to upgrade from fixed barrel to detachable. With the detachable barrels I would love to figure out a way to use standard AR15 barrels. I think it's possible. By the way, I just had an oh-shit moment with my design. I assembled everything with the 3D printed BCG, and measured the travel. To my surprise, it was only 1/4" longer than normal travel . I completely panicked and tried to figure out where I went wrong, started stripping everything down and measuring things. I started tearing apart a regular AR15 and measuring things as well, and nothing made sense.Then I realized, when you put an AR10 buffer (~3/4" shorter) in an AR15 buffer tube with an AR15 recoil spring, the coils of the spring bottom out before the buffer hits the rear of the buffer tube. All I need to do is get a flat-wire spring and it should fix the issue. Since you are making the upper, would a cam lock type design work with the AR style barrel? Either way, I love this project! |
|
Originally Posted By HK94dude: ACR uses standard AR15 barrels, so it's possible ACR barrel QD patent expires in about 3 years (on 1/11/2028). https://patents.google.com/patent/US20080168695A1/en LWRC's expires 6/6/2026 https://patents.google.com/patent/US7313883B2/en The patent for the MGI Hydra should already be expired, but I can't find it. Found this one by Mack W. Gwinn Jr. but it uses a sliding retainer, not the 2 levers as seen on the Hydra upper. https://patents.google.com/patent/US6606812B1/en It kinda sucks to change a Hydra barrel when hot (heat mitt is needed) but at least it's changeable and uses common AR barrels. Super cool project! 
|
|
Originally Posted By KitBuilder: ACR barrel QD patent expires in about 3 years (on 1/11/2028). https://patents.google.com/patent/US20080168695A1/en LWRC's expires 6/6/2026 https://patents.google.com/patent/US7313883B2/en The patent for the MGI Hydra should already be expired, but I can't find it. Found this one by Mack W. Gwinn Jr. but it uses a sliding retainer, not the 2 levers as seen on the Hydra upper. https://patents.google.com/patent/US6606812B1/en It kinda sucks to change a Hydra barrel when hot (heat mitt is needed) but at least it's changeable and uses common AR barrels. Super cool project! Originally Posted By KitBuilder: Originally Posted By HK94dude: ACR uses standard AR15 barrels, so it's possible ACR barrel QD patent expires in about 3 years (on 1/11/2028). https://patents.google.com/patent/US20080168695A1/en LWRC's expires 6/6/2026 https://patents.google.com/patent/US7313883B2/en The patent for the MGI Hydra should already be expired, but I can't find it. Found this one by Mack W. Gwinn Jr. but it uses a sliding retainer, not the 2 levers as seen on the Hydra upper. https://patents.google.com/patent/US6606812B1/en It kinda sucks to change a Hydra barrel when hot (heat mitt is needed) but at least it's changeable and uses common AR barrels. Super cool project! Railed gas block, Picatinny mount folding carry handle. |
I sell firearms produced by the finest child labor in the world, be it Filipino, Muslim, Mormon, Arizonan, or Texan.
0$$$$$$$$$$
|
Originally Posted By Type7SOT: Got 10 firing pins in! https://www.ar15.com/media/mediaFiles/490765/1000007860_jpg-3361333.JPG Attached File |
|
Attached File Does this mean there's an initial batch of 10 being made! 
|
|
Originally Posted By KitBuilder: ACR barrel QD patent expires in about 3 years (on 1/11/2028). https://patents.google.com/patent/US20080168695A1/en LWRC's expires 6/6/2026 https://patents.google.com/patent/US7313883B2/en The patent for the MGI Hydra should already be expired, but I can't find it. Found this one by Mack W. Gwinn Jr. but it uses a sliding retainer, not the 2 levers as seen on the Hydra upper. https://patents.google.com/patent/US6606812B1/en It kinda sucks to change a Hydra barrel when hot (heat mitt is needed) but at least it's changeable and uses common AR barrels. Super cool project! This is helpful information, thanks! |
|
Originally Posted By k75zracer: How about the best of both… lima6.com? Godaddy says it’s available Says its taken, I already checked that one. Theres nothing there though Attached File |
|
Originally Posted By kells81: Man, this is progressing pretty well. If you keep this pace up you might have a functioning weapon before cryostructure I think the bar is pretty low for that lol. I'm five months in and already way past him. Also, I'm not taking money from people. |
Lima Six Belt fed AR15 Build Thread (Page 6 of 91)
Armory Sponsor