Archived Posts » 60,595,333
10% AR10 lower
10/27/2011 10:35:46 PM
I know this has been disscused here before but can one take a CNC gunsmithing 10% AR10 lower and machine it to take SR25 or DPMS mags.Has anyone here done this? Is there someone who can at least cut the magwell? what are the mesurements for this? What say the experts?
10/27/2011 11:54:46 PM
In before LarryG! 
I have machined a 0% forging from Armalite. I have never tried making a DPMS clone, but I can tell you this: the AR-10 mag sits at an angle - it is not perpendicular to the top surface of the receiver. So if you machine it to fit DPMS mags you might have a ruined 10% paperweight because there is not enough room for the difference in mag well angle.
The current GEN2 armalite mags are (IMHO) superior in reliability to the other design. The slight feed angle is part of the reason for that....
I have machined a 0% forging from Armalite. I have never tried making a DPMS clone, but I can tell you this: the AR-10 mag sits at an angle - it is not perpendicular to the top surface of the receiver. So if you machine it to fit DPMS mags you might have a ruined 10% paperweight because there is not enough room for the difference in mag well angle.
The current GEN2 armalite mags are (IMHO) superior in reliability to the other design. The slight feed angle is part of the reason for that....
10/28/2011 6:01:16 PM
thanks for the advice. I think one of the mega lowers is the route I will go. I guess the only thing you have to mod is the upper: mag stop rails and take down pin holes. however it appears in the photos of the CNC 10% lowers from justin that the rear area of the magwell is vertical while the front face is the standard 3 degree angle that is on the armalite forging. that is what led me to think it would be possible to cut a straight vertical magwell. I'm doing this for a retro AR10B upper. other wise I would'nt be concerned. I know the GEN two mag is high Quality.
10/28/2011 7:07:30 PM
10/28/2011 11:41:54 PM
The original Dutch AR10's made 1958-1961 had a zero degree magwell. Those old waffle mags are nearly identical to the modern DPMS mags and I have seen original Dutch AR10's that used slightly modified DPMS mags. Therefore I see little reason why Justin's paperweight can not be made to use waffle or DPMS magazines with a zero degree magwell. Just pretend you are finishing a DPMS style lower, except the upper-lower mating profile is modern Armalite AR10.
Larry, is this an AR10?
Larry, is this an AR10?
10/28/2011 11:54:02 PM
Originally Posted By HHollow:
The original Dutch AR10's made 1958-1961 had a zero degree magwell. Those old waffle mags are nearly identical to the modern DPMS mags and I have seen original Dutch AR10's that used slightly modified DPMS mags. Therefore I see little reason why Justin's paperweight can not be made to use waffle or DPMS magazines with a zero degree magwell. Just pretend you are finishing a DPMS style lower, except the upper-lower mating profile is modern Armalite AR10.
Larry, is this an AR10?
http://oi44.tinypic.com/15694d3.jpg
The original Dutch AR10's made 1958-1961 had a zero degree magwell. Those old waffle mags are nearly identical to the modern DPMS mags and I have seen original Dutch AR10's that used slightly modified DPMS mags. Therefore I see little reason why Justin's paperweight can not be made to use waffle or DPMS magazines with a zero degree magwell. Just pretend you are finishing a DPMS style lower, except the upper-lower mating profile is modern Armalite AR10.
Larry, is this an AR10?
http://oi44.tinypic.com/15694d3.jpg
Of course it is, but you don't really care about that. It's irrelevant since that model hasn't been made in about 50 years or so and very few are available now and most of them are class 3 NFA items.
All this is a lot of crap to do just to use a different mag and that is what I am rolling my eyes about. It sure seems in the long run, one would spend more on this project than they would in buying a whole lot of Gen 2 mags and it's just more of the same old crap.
10/29/2011 12:30:28 AM
LARRYG Wrote: Of course it is (an AR10), but you don't really care about that. It's irrelevant since that model hasn't been made in about 50 years or so and very few are available now and most of them are class 3 NFA items.
All this is a lot of crap to do just to use a different mag and that is what I am rolling my eyes about. It sure seems in the long run, one would spend more on this project than they would in buying a whole lot of Gen 2 mags and it's just more of the same old crap.
All this is a lot of crap to do just to use a different mag and that is what I am rolling my eyes about. It sure seems in the long run, one would spend more on this project than they would in buying a whole lot of Gen 2 mags and it's just more of the same old crap.
True, the Dutch stopped making the original Armalite AR10 about 50 years ago, about 4 years after Armalite made about 40-50 of the rifles in Hollywood CA. Then in the 1980's a bunch of parts kits were imported and mated with American made semi-auto lower receivers. From a legal standpoint those rifles were "made" in the 1980's and continue to be "made" today. There were a few full-autos imported before 1968 and then some of the American-made semi-autos were legally converted before 1986. However, full-auto AR10's of this pattern are still very scarce and most of the original AR10's in the US are semi-automatics.
Many AR15 owners are building and modifying rifles to resemble the earlier models. The same is starting to happen with AR10's. Even the Armalite company has recognized this by releasing the limited edition that looked kinda sorta like an original Sudanese contract rifle. The waffle magazine is sexy, both the .223 and 7.62mm version.s
