Modern Sporter builds Q&A

[d.kurp]

Can anyone with a maple ridge handguard comment on how it matches the modern sporter? I saw a pic of one on an slr and it didn’t really match the anodizing? Or the color. Not sure of the correct terminology.

check out the picture thread, I believe seeing one on there for sure with a maple ridge hand guard. should see it on the first page I think, if not only 5-6 pages and you'll be able to see some nice builds. From what I can tell by the pictures is it matches alright.
I don't think everything will have an exact match, my V7 handgaurd doesn't match 100%...

 

[valentinemichaelsmith]

This is a build Q&A thread, not a "i dont understand supply and demand and i want everything at cost or you're mean" thread.

 

[XLNC]

Taking that pin out is a Beaach!
The small screw is locktited in.
You have to grip on the needle nose with the grip of Thor

After removing the pin , I got the U:L together, but it wasn’t easy.
You have to tip the upper on a coward angle to the lower( kinda like putting them together backwards.
The front will not pivot, once the back pin is out.
So now for the weird stuff.
Riding the CH will allow the trigger to work.
Slamming the CH will not engage the trigger.

Trigger works with a mag when you release the bolt via the bolt release, but not when you release it manually.. (dummy rnds)

Then it’s opposite on an empty mag.
Also the maritime bolt catch is very stiff.

I think the trigger is causing all these issues and is a no go.

Correct me if I'm wrong but it seems like you have issues with the TriggerTech adjustable beyond just the spacing issue between the upper rear lug and the trigger housing to get the upper onto the lower?

Even if you were to use the KNS takedown pin, do you think the TT adjustable would work?

 

[propliner]

The Maple Ridge handguards look a little lighter than the ATRS receivers in the sunlight.

 

[ATRS Shaun]

We've developed a modification to the receivers which MAY allow for the use of standard rear takedown pins to help accommodate some of the problem trigger groups. If it's something you'd be interested in, email the shop : info@albertatacticalrifle.com to inquire.

This modification DOES NOT allow for the upper to tilt like an AR does, it simply helps solve some of the trigger compatibility issues with the Hyperfire and a couple other exotic triggers.

And like any after the fact modification there are risks associated with it. The possibility of minor marks in the anodizing, breaking drill or tap exist regardless of how careful we are.

 

[onetwentyish]

We've developed a modification to the receivers which allows for the use of standard rear takedown pins also. If it's something you'd be interested in, email the shop : info@albertatacticalrifle.com to inquire.

So you have a mod that allows use of a standard rear takdown pin in place of the rear cross bar? I am a little perplexed what the benefit is givens that the design requires the upper to move forwards so that the BCG can clear the lower's buffer threads.

Does having a sliding rear takedown pin really give you that extra little bit of wiggle room to clear ithe upper's rear lug from the trigger pack guys are having trouble with? If so that is a great way to overcome a little pesky quark like that!

Must say, I am far to tempted to spend money I dont have with all these recievers sitting around. I am very tempted to sell my uppers so that I once again can stop watching the ee for parts I cant afford. Lol!

For now though I will keep sitting on them and slowly accumulate parts and donar rifles as they come up. The pre-built MS I picked up off the ee isn't even really a light weight build but it is my lightest NR 556 semi by a full pound. Cant weight (see what I did there) to tackle a light weight build when I have a wheelbarrow full of money to light on fire just to see just how light a NR 556 semi can be made. Haha

 

[PinkyPlinker]

We've developed a modification to the receivers which allows for the use of standard rear takedown pins also. If it's something you'd be interested in, email the shop : info@albertatacticalrifle.com to inquire.

I’m ordering the KNS takedown pin. Two questions - just the takedown pin, not the pivot pin, correct? Do I request this mod or am I good to go with the KNS? I’m in the second order, just putting parts together.
Thanks!

 

[rimlick]

I’m ordering the KNS takedown pin. Two questions - just the takedown pin, not the pivot pin, correct? Do I request this mod or am I good to go with the KNS? I’m in the second order, just putting parts together.
Thanks!

You are correct. Just the front pin.

My understanding was this is part of what the RCMP riqures for non restricted status. Why? No clue. Maybe it has to do with dropping in a lighting link or some other prohibited modifications

 

[valentinemichaelsmith]

You are correct. Just the front pin.

My understanding was this is part of what the RCMP riqures for non restricted status. Why? No clue. Maybe it has to do with dropping in a lighting link or some other prohibited modifications

Where did you hear that out of curiosity? The stag 10 and bcl 102 both have rear takedown pins, as well as the bcl badger which is non restricted. Doesnt seem like the takedown pin has a bearing on classification.

 

[Kratos]

Where did you hear that out of curiosity? The stag 10 and bcl 102 both have rear takedown pins, as well as the bcl badger which is non restricted. Doesnt seem like the takedown pin has a bearing on classification.

They decided on a solid rear pin so it was less like an AR15, helping he RCMP decide on NR status. One of many things ATRS changed functionally or dimensionally.

 

[alberta tactical rifle]

I’m ordering the KNS takedown pin. Two questions - just the takedown pin, not the pivot pin, correct? Do I request this mod or am I good to go with the KNS? I’m in the second order, just putting parts together.
Thanks!

You could employ both front and rear KNS style TD pins if you wished.

 

[alberta tactical rifle]

They decided on a solid rear pin so it was less like an AR15, helping he RCMP decide on NR status. One of many things ATRS changed functionally or dimensionally.

Actually we opted for as supplied and installed rear cross pin so as to keep a given tolerance. Some TD pins are larger and some smaller dimension-ally, granted only by a thou or 2, but stacking tolerances makes for increased play between the upper and lower, something we are trying to keep to a minimum.

 

[alberta tactical rifle]

You are correct. Just the front pin.

My understanding was this is part of what the RCMP riqures for non restricted status. Why? No clue. Maybe it has to do with dropping in a lighting link or some other prohibited modifications

No, the criteria is simply not being able, even with hay wire or duct tape to attach and AR15 upper or lower to our reciever set halves and be able to discharge a single round, regardless of the danger to the person shooting said single round.

Apparently AR10s have a totally different criteria?

 

[apex survival]

Rick/Shaun,

Several posters (myself included) have had magazine incompatibility issues due to the very slight overhang of the upper, at the top forward edge of the magwell. It seems mags that have a square profile at the front (similar to IMI beo) may not seat because of the interference from the upper. Can you confirm this issue is being looked at and corrected in time for the FA run of uppers? I don't mind much for my SS because it is going to be built into a 6.5 in the future, but the FA needs to take the IMI beo mags.

 

[XLNC]

We've developed a modification to the receivers which allows for the use of standard rear takedown pins also. If it's something you'd be interested in, email the shop : info@albertatacticalrifle.com to inquire.

Yep, you got back to me yesterday on this. I just figure getting a KNS takedown pin is the easier option at the moment instead of sending my receiver back to you.

 

[alberta tactical rifle]

Rick/Shaun,

Several posters (myself included) have had magazine incompatibility issues due to the very slight overhang of the upper, at the top forward edge of the magwell. It seems mags that have a square profile at the front (similar to IMI beo) may not seat because of the interference from the upper. Can you confirm this issue is being looked at and corrected in time for the FA run of uppers? I don't mind much for my SS because it is going to be built into a 6.5 in the future, but the FA needs to take the IMI beo mags.

If you can lend us a mag for a couple of weeks we can address this I believe. We have about 50 different mags here, but not 1 of those to try, and every one we tried worked or we would have changed things till it did. NOW would be the best time as we are just switching over the mills to start to run F/A uppers.

We ARE going back to the standard size ejection port dimensions from the big bore port dimensions we ran in the SS uppers, just so you are aware.

 

[apex survival]

If you can lend us a mag for a couple of weeks we can address this I believe. We have about 50 different mags here, but not 1 of those to try, and every one we tried worked or we would have changed things till it did. NOW would be the best time as we are just switching over the mills to start to run F/A uppers.

We ARE going back to the standard size ejection port dimensions from the big bore port dimensions we ran in the SS uppers, just so you are aware.

I will email - will lend you a magazine for test purposes.

 

[quikcolin]

The Maple Ridge handguards look a little lighter than the ATRS receivers in the sunlight.

So great to see a high quality photo showcasing the rifle and a MRA handguard. I have an MRA handguard coming as well. Looks great! I'm going to see if ATRS can Cerekote my handguard to match the receiver set?

 

[scourge18a]

So great to see a high quality photo showcasing the rifle and a MRA handguard. I have an MRA handguard coming as well. Looks great! I'm going to see if ATRS can Cerekote my handguard to match the receiver set?

They have mentioned a couple of times they used G96 to get that rich black look.
My uppers came bare with no oil and looked dull in comparison to my lower so I soaked them in G96. Matches perfectly now.
I had a similar dull look on my Odin handguard so I gave it the same G96 treatment and now seems to be nearly identical. I think you will always have a variation in anodized color depending on who does it but this was close enough for me.
You can maybe try that but if you are going Cerakote anyways maybe don't bother as all the oil will have to be cleaned off.

 

[Pschilly]

They have mentioned a couple of times they used G96 to get that rich black look.
My uppers came bare with no oil and looked dull in comparison to my lower so I soaked them in G96. Matches perfectly now.
I had a similar dull look on my Odin handguard so I gave it the same G96 treatment and now seems to be nearly identical. I think you will always have a variation in anodized color depending on who does it but this was close enough for me.
You can maybe try that but if you are going Cerakote anyways maybe don't bother as all the oil will have to be cleaned off.

G96 as in the cleaner stuff?