Maple Ridge Armoury AR10 Barrels. Shot targets added post #75 Nov 16th

I really think the flutes indexing is not a big deal it's purely cosmetic however, if someone is particular about indexing perhaps different type of fluting like diamond flutes may be less noticeable where it index with the gas port.
 
Spcamno said:
I really think the flutes indexing is not a big deal it's purely cosmetic however, if someone is particular about indexing perhaps different type of fluting like diamond flutes may be less noticeable where it index with the gas port.
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Or spiral flutes or flame flute would be impossible to distinguish indexing
 
Did you get a chance to test the pencil barrel on the POI shift after a mag dump? Glad to hear you're guaranteeing sub-moa with match ammo.
 
Maple Ridge Armourer said:
We cannot perfectly time the chamber threads of the barrel in relation to the flutes. In this way, we cannot determine where the barrel extension will bottom out and in turn where the index pin will align. The gas port is drilled as the final step in production and is located off the barrel extension index pin. For this reason, we are unable to symmetrically time the gas port to the flutes.

Trust me, if there was an easy way to align the flutes with the gas port, then we would be doing this. If anyone has any ideas on how we can easily do this for mass production, I am all ears.
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What are you using for a CNC lathe? Sounds like a machine with C axis and live tools would be fine, you don't even need y axis for what your doing. Also if you doing separate ops a probe would find center fast.

The tech exists maybe a new machine would have you turning out barrels faster with better cosmetic looks?
 
Evogun said:
What are you using for a CNC lathe? Sounds like a machine with C axis and live tools would be fine, you don't even need y axis for what your doing. Also if you doing separate ops a probe would find center fast.

The tech exists maybe a new machine would have you turning out barrels faster with better cosmetic looks?
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Sounds like they are chambering after fluteing. The index of the flutes is all up to how the barrel barrel extension and head spacing goes. If the threads on that barrel extension are out a fraction of a turn it throws the whole thing off.

Cant just cut the threads back a little more to get it perfect. Gotta take the extension off cut the threads back. Cut the face of the barrel back so there is clearance for the bolt and run the reamer in just enough to take out the perfect amount so it head spaces right. If that reamer goes .003" to deep. Gotta start all over again.

It would be soooooo much easier to flute it after its chambered and head spaced.
 
once the hand guard is on how much time are you going to spend staring down the barrel...
 
greg olmstead said:
Mill the flutes after its indexed is about the only way to get them perfect everytime. Or just dont flute them if that's possible. Wish you offered them without flutes
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Good thought on milling after index but not possible for a variety of reasons.

We are considering adding non-fluted barrels in 2019. These are just so nice because of the weight savings and I think the flutes are ###y.
 
wildphil24 said:
Not sure about my idea but just in case... Could you rotate the flutes 45 degrees? As the flutes are wider (than the ridges/ribs) it could be harder to locate their center. Possibly giving a few more degrees of forgiveness before the eye catches the imperfection.

Beautiful handguard as well.
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Good thought but not possible for a variety of reasons.
 
greg olmstead said:
Sounds like they are chambering after fluteing. The index of the flutes is all up to how the barrel barrel extension and head spacing goes. If the threads on that barrel extension are out a fraction of a turn it throws the whole thing off.

Cant just cut the threads back a little more to get it perfect. Gotta take the extension off cut the threads back. Cut the face of the barrel back so there is clearance for the bolt and run the reamer in just enough to take out the perfect amount so it head spaces right. If that reamer goes .003" to deep. Gotta start all over again.

It would be soooooo much easier to flute it after its chambered and head spaced.
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Everything is done on a Lathe with live tooling. Its not cost effective to do a 3rd op on a mill and we dont have a steady rest so we cannot easily support the full length of the barrel to do flutes on the final op.

Even if we test fit the extension, head spaced, then removed the extension and cut back the face until we found alignment with the flutes, we would then have to re-chamber and head space since the chamber face dimension has changed. Also, when the barrel extension is torque on, it moves a little more compared to hand tight so we would still be out a degree or two.

We have brainstormed the #### out of this and we cant find a way of perfectly aligning the flutes to the gas port in a cost effective way conducive to production level manufacturing. Perhaps if we were only running small batches but we are making several hundred each month and we still cant keep up with demand.

I do appreciate everyone's input. Good thing it is a small aesthetic quirk that is covered by the hand guard and doe not affect function.
 
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Only one thing to do then. Release the 20” m118r 5R 1:11.25 twist nitride with helical fluting. PgW set this as a Canadian standard in military grade precision rifles!

I personally think that would be an exceptional cool barrel.
 
Epoxy7 said:
Only one thing to do then. Release the 20” m118r 5R 1:11.25 twist nitride with helical fluting. PgW set this as a Canadian standard in military grade precision rifles!

I personally think that would be an exceptional cool barrel.
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I really like this idea. Ill do a few of the 20" 6.5 Grendel barrels like this in January. Perhaps get some in Cerakote FDE. ;)
 
Just got the barrel Friday! Assembled Friday night. Thanks for the gift certificate, it was an unexpected bonus.
 
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