angryeyebrows
CGN frequent flyer
- Location
- Oscar Mike
Some guy in Saskatchewan?
ATRS Modern Sporter... Some Initial Observations
- Thread starter angryeyebrows
- Start date
Some guy in Saskatchewan?
onetwentyish
CGN Ultra frequent flyer
- Location
- East Central AB (AKA Northern Texas)
I believe my lancers drop free, but upon insertion they hang up if the have any rearward pressure on them (which causes the feed lips to lean ahead and catch the uppers forward overhang somewhere.
Rearward pressure? So if you push on them they stick? Shocking.
Better sell off all 50 uppers and lowers you bought, lol
onetwentyish
CGN Ultra frequent flyer
- Location
- East Central AB (AKA Northern Texas)
Rearward pressure? So if you push on them they stick? Shocking.
Better sell off all 50 uppers and lowers you bought, lol
I wish I had that many, haha, unfortunately I only have enough to fill a single Pelican 1780...
And to further clarify it forward edge of my steel lipped lancers catch on the forward edge of the upper during insertion under normal circumstances, not just when you try to make them, I am just explaining that ANY rearward force will likely result in the mags catching during insertion, and the only way to guarantee the mags won't catch on the ledge is to pull forward during insertion.
To paint the picture for you, I am not talking about the mags binding due to force, I am talking about metaphorically running a shopping cart (the mag) into a curb (where the lower transition into the upper in the front of the mag well).
The fix would be to slope the curb (bevel the lead edge of the magwell) so that the cart (the mag) can be pushed up it without impact.
Its a simple fix I believe, but I will need to take another look at it again.
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ATRS Shaun
Business Member Rep.
- Location
- Calgary, AB
That is part two of the two part issue, some uppers and lowers create this lip, an easy fix we just increase the clearance. Shoot us an e-mail or drop off any problem uppers you've got.
onetwentyish
CGN Ultra frequent flyer
- Location
- East Central AB (AKA Northern Texas)
Dont worry, I know I will be looked after, thats the best part about living within driving distance of you guys! As soon as I have plans to come down I will be in touch!!!
Hmmm, My MS set has already been touched up by ATRS and my AA 6.5 mags both insert and drop free cleanly. I swapped in my 223 MRA barrel so I could play with it while waiting for my 6.5 reloading gear and Pmags also insert and drop free cleanly.
I haven't tried putting weird forces or loads on the mags to try to induce a problem though. I don't see the point in doing silly stuff to induce a problem just so I can post something on the internet.
So far I'm very happy with my receiver set. The only real issue is the area the buffer tube threads into being a little too thick which forced me to run without the buffer retainer when using a rifle tube for my UBR. The buffer tube also needed to be modified slightly when using a carbine tube and the Magpul carbine fixed stock. Both more of an inconvenience than anything else and nothing I care to complain about as it's so minor I can live with it.
- Location
- Red Deer, Alberta
ATRS had to fix my upper to get it to work with Alexander Arms 6.5 Grendel mags. Just a bit of machining inside so the AA magazines would seat, my other mags worked fine before they machined the upper.
After reading this thread I purposefully tried to get my charging handle to jam up, and it won't with a reasonable amount of force / deliberate ignorance. I don't know if I'm lucky or the combination of parts I have are sound. JP Enterprises ULMOS carrier with JP 6.5 Grendel Bolt & Radian Raptor LT charging handle.
After reading this thread I purposefully tried to get my charging handle to jam up, and it won't with a reasonable amount of force / deliberate ignorance. I don't know if I'm lucky or the combination of parts I have are sound. JP Enterprises ULMOS carrier with JP 6.5 Grendel Bolt & Radian Raptor LT charging handle.
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ATRS Shaun
Business Member Rep.
- Location
- Calgary, AB
Not just in your opinion, which is why we had emailed everyone that was affected with a number of options and it will be rectified on all future runs. A side effect and oversight from using the modern varmint to develop the modern sporter.
angryeyebrows
CGN frequent flyer
- Location
- Oscar Mike
It won’t jam up, but you should notice it snag.
Pull your handle to the rear, and lock the bolt back. While keeping the bolt locked to the rear, by pressing the bottom of your bolt catch, slide the handle back and forward a few times. When it’s at the rear, you should feel the handle drop into the cutout slightly. It’s not enough to impede function if you are aggressive with the drill, but it’s annoying. It will only occur when the bolt is locked to the rear.
ATRS Shaun
Business Member Rep.
- Location
- Calgary, AB
Which is every double feed drill...
Solution?
Try it first, then decide for yourself. Just my 2c.
Meh, takes 2 seconds extra to put the upper and lower together. It's an inconvenience at best, nothing more.
It's not like little pieces are going to go flying when you take it apart.
What are the options? The only one I was aware of is the JP captured spring system. I have one in my MH but don't care enough to spend the money to fix this for how little it bothers me. I could also just go back to the carbine tube and different stock to have the retainer pin work again.
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Try it first, then decide for yourself. Just my 2c.
If I see one at the range I will ask to check it out. Otherwise looking to see what Angryeyebrows thinks. What he described tells me he's had training with double feed drills as that is the exact time you would run into that issue. That and proving your carbine empty on the line. Just making sure it's not a concern if I plan on building an AR like carbine and running it properly.
Wondering if a different charging handle would mitigate any of this etc. If so, then it's not really much of an issue to me. If not, well then yes I will wait and see myself, eventually.
angryeyebrows
CGN frequent flyer
- Location
- Oscar Mike
Yes I have training, and a bit of time behind an AR. Like I said above, it’s more of an annoyance, and if push comes to shove, you can work the drills. Ultimately, I’ve decided it’s not a show stopper. I’d prefer it wasn’t there, but then again I’d prefer the design allowed for the upper and lower to hinge open too.
My charging handle is a Raptor by AXTS. They are pretty popular, and quite expensive. I would consider it a high-end part, so I’m not sure if there will be a handle that performs any better. Best advice, is handle one for yourself.
Ya, the carbine tube only needs mods if you run the fixed carbine stock as it has the cross bolt that catches on the front of the ramp to the notches on the bottom. All other carbine stocks should require no mods to the tube.
I understand people expecting perfection for a $1000 receiver set but it's such a small inconvenience I don't really care at all.
Second batch should be a non issue.
It IS nice though for a manufacturer to listen to the market and make changes as things come up. They have been 110% stand up and owned some of these small things and made good on correcting it to the best of their ability. To me that speaks volumes as to their corporate integrity. Being able to call or email them and get answers PDQ is something you don't see in the firearms industry much, or any industry for that matter any more.
