Magpul and ARFCOM AR-15 lowers
Each of these lowers is a limited edition.
Magpul lower ...
ARFCOM lower ...
[ Many thanks to jdun1911 for emailing me the link. ]
23 Responses to “Magpul and ARFCOM AR-15 lowers”
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Dr. Feelgoodwrote on February 17th, 2010 at 7:44 am Link To Comment |
jdun1911, I’m planning my first AR build and I’m interested in your statement that forged lowers are stronger than billet. I’ve always heard the opposite. Can you clarify that, please?
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Suburbanwrote on February 16th, 2010 at 5:59 pm Link To Comment |
The anime girl kind of screams “AIRSOFT!” Figuratively speaking, of course. Seems like an odd choice of things to put on an AR lower.
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jdun1911wrote on February 17th, 2010 at 11:57 am Link To Comment |
Billet are made out of 6061 aluminum. Billet AR15 receiver are made out of 6061-T6 aluminum. The T6 means it is heat treated to give it extra strength. Forge AR15 receiver are made out of 7075-T6 aluminum. The 7056 aluminum have far more tensile strength then 6061. The forging process make it even stronger. 7075 aluminum have greater resistant to corrosion then 6061.
The original M16A1 receivers were made out of 6061 (IIRC) aluminum but was later switch to 7075 for corrosion resistances.
You can tell between forge and billet receiver just by the looks. The Arfcom receive is forge. The magpul receiver is billet. Billet receiver are easier to mill then forge. Billet receiver are made out of a block of billet aluminum. Forge receiver already has it shape so less milling are required.
This is a forge AR15 7075-T6 aluminum blank. You can buy it without a FFL. Notice it has already been shaped by the forging process. However you have to mill it to make it a functional receiver and that takes time. I recommend to anyone to buy one for learning experience. At the very least it is a good paper weight. I have bought many products from DSARMS, so no fear.
http://www.dsarms.com/AR15-Lower-Receiver-7075-T6-Alloy-Forging-Military-Spec—1001/productinfo/1001/
This is a video of how billet receiver are made. It started as a block of 6061-T6 aluminum and hence can be shape whatever the designer like.
http://www.thefirearmblog.com/blog/2009/02/25/how-billet-ar-15-receivers-are-made/
With that said, you should not worry about lower receiver strength. AR15 receiver upper and lower are almost stress free. In other words they will last long then you, your kids and their grand kids, theoretically of course.
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Steveresponded to jdun1911 on February 17th, 2010 at 12:10 pm Link To Comment |
jdun1911, thanks for the info .
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Richard Fitzpatrickwrote on July 16th, 2011 at 8:07 am Link To Comment |
All Magpul Lowers are 7075-T6 with the exception of the first 3 which were used to test the CNC program
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jdun1911wrote on February 18th, 2010 at 1:39 pm Link To Comment |
As far as I know POF is the only one that make 7075-T6 billet receivers. There might be others that I’m not aware off tho or companies that have to 7075-T6 billet receivers.
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Dr. Feelgoodwrote on February 18th, 2010 at 6:22 am Link To Comment |
Okay, thanks. I’m well acquainted with the different manufacturing processes and alloy ratings. I thought you were talking about forged vs. billet of the same alloy. All other things being equal, the main advantage of a forging over a milled billet is the dense graining of material in the molecular “shell” which provides a harder wear surface and better corrosion resistance. Otherwise the different manufacturing processes should yield final receivers of roughly equivalent strength. There are many AR makers who machine their lowers from 7075-T6 billets.
I agree that AR lowers are under very little stress (unless abused) and the substantial strength difference between 6061 and 7075 is practically negligible in this application. The AR-180B has a polymer lower, and the only material failure I’ve ever seen discussed is elongation of the forward pin holes resulting from repeated takedowns.
So where can I get an AR lower milled from 416 Stainless Steel?
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jdun1911wrote on February 17th, 2010 at 4:30 pm Link To Comment |
When I said stress I mean impact stress. You do not want the upper receiver to be made out of plastic because of heat stress. It will you know melt the plastic and barrel threads off which is bad.
Here is the the tensile strength properties for aluminum. The 7075-t6 unforged (83.0) has almost twice the tensile strength then 6160-t6 (45.0)
http://www.americanmachinetools.com/tensile_strength.htm
I believe Anchor Harvey is one of a handful of companies that does AR15 forging. DSArms get their lower forge blanks from them as well as many AR15 manufactures. You might want to check out their website if you’re interested in how they do forging.
http://www.anchorharvey.com/the_process.html
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Mattwrote on February 16th, 2010 at 11:42 am Link To Comment |
When they produce a batch, are they normally distributed through Noveske?
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jdun1911wrote on February 16th, 2010 at 11:18 am Link To Comment |
From what Jeep297 posted on the thread:
“Not only is it real but It’s the rarest of all of magpul lowers. The china doll series lowers are supposed to only be for special magpul employees or people who have done a lot for their company.”
The magpul lower is really nice. It is made out billet, not as strong as forge but it allows them to shape the lower as they wanted it.
I like the Arfcom lower roll mark. From what I understand it will be available in the near future. If the price is right I might pick at least one.
The only place I know that make customize roll marks and serial numbers is Fidelis Arms. If there are any other companies that is out there that make customize roll marks and serial numbers out of blank receiver for the general public post it up.
Please rate this comment: 0 0-
Steveresponded to jdun1911 on February 16th, 2010 at 12:21 pm Link To Comment |
jdun1911, thanks for the info.
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B Woodmanwrote on February 16th, 2010 at 1:58 am Link To Comment |
Who’s the anime cutie on the MAGPUL lower?
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SpudGunwrote on February 15th, 2010 at 11:58 pm Link To Comment |
At first I wasn’t interested, but then someone put the word MAGPUL on it and now I have to buy it!
If only Magpul made cars and houses and clothes, then my life would be complete.
I’m being sarcastic by the way.
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Aurelienwrote on February 15th, 2010 at 10:26 pm Link To Comment |
The Magpul (MPLA-C) has been around for a year now, but only sold on some 50 Noveske complete rifles, never lower-only.
Seems their insurance company stopped bothering them.Please rate this comment: 0 0 -
Toddwrote on February 16th, 2010 at 2:11 am Link To Comment |
Is is just me or does that ARFCOM lower look a little on the poorly finished side?
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Isaacwrote on February 16th, 2010 at 4:45 am Link To Comment |
The C series were basically only given out to employees or folks who’d made a notable contribution to the growth and development of Magpul.
You almost certainly will not find the C series sold openly. The A and B series have been sold on limited run Noveske guns.
Please rate this comment: 0 0-
Steveresponded to Isaac on February 16th, 2010 at 12:08 pm Link To Comment |
Isaac, ah, thanks for the info.
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Jimwrote on February 16th, 2010 at 8:50 am Link To Comment |
Why does the top picture look like mickey mouse’s head with a surgical mask on and a thought bubble coming out?
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Destroyerwrote on February 16th, 2010 at 8:42 am Link To Comment |
those are gnarly (in a good way) lowers. Reminds me of those from tactical innovations…big, meaty, and rugged.
Please rate this comment: 0 0 -
Lancewrote on February 16th, 2010 at 8:09 am Link To Comment |
Cool love the Grey color. Do they make a A1 style lower.
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Bandito762wrote on February 16th, 2010 at 6:05 am Link To Comment |
So, does the magpul lower have ambi magazine release? How does it work?
Please rate this comment: 0 0 -
Mattwrote on February 15th, 2010 at 8:53 pm Link To Comment |
WHERE can you buy that magpul lower? I wanted to put together a new AR but now I’d rather buy that lower. Someone, PLEASE tell me!
Please rate this comment: 0 0-
Steveresponded to Matt on February 15th, 2010 at 9:17 pm Link To Comment |
Matt, special edition. They make a handful every so often.
Please rate this comment: 0 0
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All Magpul Lowers are 7075-T6 with the exception of the first 3 which were used to test the CNC program
As far as I know POF is the only one that make 7075-T6 billet receivers. There might be others that I’m not aware off tho or companies that have to 7075-T6 billet receivers.
Okay, thanks. I’m well acquainted with the different manufacturing processes and alloy ratings. I thought you were talking about forged vs. billet of the same alloy. All other things being equal, the main advantage of a forging over a milled billet is the dense graining of material in the molecular “shell” which provides a harder wear surface and better corrosion resistance. Otherwise the different manufacturing processes should yield final receivers of roughly equivalent strength. There are many AR makers who machine their lowers from 7075-T6 billets.
I agree that AR lowers are under very little stress (unless abused) and the substantial strength difference between 6061 and 7075 is practically negligible in this application. The AR-180B has a polymer lower, and the only material failure I’ve ever seen discussed is elongation of the forward pin holes resulting from repeated takedowns.
So where can I get an AR lower milled from 416 Stainless Steel?
When I said stress I mean impact stress. You do not want the upper receiver to be made out of plastic because of heat stress. It will you know melt the plastic and barrel threads off which is bad.
Here is the the tensile strength properties for aluminum. The 7075-t6 unforged (83.0) has almost twice the tensile strength then 6160-t6 (45.0)
http://www.americanmachinetools.com/tensile_strength.htm
I believe Anchor Harvey is one of a handful of companies that does AR15 forging. DSArms get their lower forge blanks from them as well as many AR15 manufactures. You might want to check out their website if you’re interested in how they do forging.
http://www.anchorharvey.com/the_process.html
Billet are made out of 6061 aluminum. Billet AR15 receiver are made out of 6061-T6 aluminum. The T6 means it is heat treated to give it extra strength. Forge AR15 receiver are made out of 7075-T6 aluminum. The 7056 aluminum have far more tensile strength then 6061. The forging process make it even stronger. 7075 aluminum have greater resistant to corrosion then 6061.
The original M16A1 receivers were made out of 6061 (IIRC) aluminum but was later switch to 7075 for corrosion resistances.
You can tell between forge and billet receiver just by the looks. The Arfcom receive is forge. The magpul receiver is billet. Billet receiver are easier to mill then forge. Billet receiver are made out of a block of billet aluminum. Forge receiver already has it shape so less milling are required.
This is a forge AR15 7075-T6 aluminum blank. You can buy it without a FFL. Notice it has already been shaped by the forging process. However you have to mill it to make it a functional receiver and that takes time. I recommend to anyone to buy one for learning experience. At the very least it is a good paper weight. I have bought many products from DSARMS, so no fear.
http://www.dsarms.com/AR15-Lower-Receiver-7075-T6-Alloy-Forging-Military-Spec—1001/productinfo/1001/
This is a video of how billet receiver are made. It started as a block of 6061-T6 aluminum and hence can be shape whatever the designer like.
http://www.thefirearmblog.com/blog/2009/02/25/how-billet-ar-15-receivers-are-made/
With that said, you should not worry about lower receiver strength. AR15 receiver upper and lower are almost stress free. In other words they will last long then you, your kids and their grand kids, theoretically of course.
jdun1911, thanks for the info .
jdun1911, I’m planning my first AR build and I’m interested in your statement that forged lowers are stronger than billet. I’ve always heard the opposite. Can you clarify that, please?
The anime girl kind of screams “AIRSOFT!” Figuratively speaking, of course. Seems like an odd choice of things to put on an AR lower.
When they produce a batch, are they normally distributed through Noveske?
From what Jeep297 posted on the thread:
“Not only is it real but It’s the rarest of all of magpul lowers. The china doll series lowers are supposed to only be for special magpul employees or people who have done a lot for their company.”
The magpul lower is really nice. It is made out billet, not as strong as forge but it allows them to shape the lower as they wanted it.
I like the Arfcom lower roll mark. From what I understand it will be available in the near future. If the price is right I might pick at least one.
The only place I know that make customize roll marks and serial numbers is Fidelis Arms. If there are any other companies that is out there that make customize roll marks and serial numbers out of blank receiver for the general public post it up.
http://www.fidelisarms.com
jdun1911, thanks for the info.
Why does the top picture look like mickey mouse’s head with a surgical mask on and a thought bubble coming out?
those are gnarly (in a good way) lowers. Reminds me of those from tactical innovations…big, meaty, and rugged.
Cool love the Grey color. Do they make a A1 style lower.
So, does the magpul lower have ambi magazine release? How does it work?
The C series were basically only given out to employees or folks who’d made a notable contribution to the growth and development of Magpul.
You almost certainly will not find the C series sold openly. The A and B series have been sold on limited run Noveske guns.
Isaac, ah, thanks for the info.
Is is just me or does that ARFCOM lower look a little on the poorly finished side?
Who’s the anime cutie on the MAGPUL lower?
At first I wasn’t interested, but then someone put the word MAGPUL on it and now I have to buy it!
If only Magpul made cars and houses and clothes, then my life would be complete.
I’m being sarcastic by the way.
The Magpul (MPLA-C) has been around for a year now, but only sold on some 50 Noveske complete rifles, never lower-only.
Seems their insurance company stopped bothering them.
WHERE can you buy that magpul lower? I wanted to put together a new AR but now I’d rather buy that lower. Someone, PLEASE tell me!
Matt, special edition. They make a handful every so often.