Just wondering if anyone with the Nitride 5R barrel are having issues with the alinement pin on the extension coming loose and the plating on the face of the extension starting to peal off?
Is it common for the plating to come off like that, and when I try to tighten the barrel the pin tilts and the barrel moves, I had it installed already but had to remove it to install a new handguard and
now the pin is loose. I have about a 150 rounds through it so far.
We are not receiving emails to
info@mapleridgearmoury.com right now, we are working to correct this. Please send all emails to
ryanj@victoryridgesports.ca for the time being.
This is the first case of an index pin coming loose and of the NiB plating flaking. This is not anything that could have been caught in QC and it is highly unusual.
The barrel extensions are torqued on at 140ft-lb and the index pin is hammered into place. FYI It is the torque on the barrel nut that holds it in place on the barrel. The index pin is there to index the barrel to the receiver and although it does recess slightly into the barrel chamber threads, it is doing very little to hold the barrel nut in place.
To answer another question about the plating, we use a NiB plating to increase surface wear and corrosion resistance. The extensions are not stainless steel, they are 8620 and will corrode if not oiled or otherwise treated. The cost of plating vs Nitride is very close and the NiB has served us well for two years so we will continue to use this process. The extensions are machined for us under contract and then plated at a professional plating company with Aerospace and Defence contracts. We have certificates of conformity for our plating along with all of our other post-production processes.
Now to address the warranty issue.
Who originally installed the barrel for you?
It would have taken an extreme amount of rotational force applied directly to the barrel for the extension to loosen from the barrel even without an index pin in place. During installation of the the barrel nut only the receiver and barrel extension are contacted by the nut and rotational force is only applied to the barrel nut. Under what circumstances was rotational force applied to the barrel?
As for the index pin coming loose, the only thing I can think of is an out of tolerance pin or nut. If the pin was on the short side of the tolerance and the hole in the nut was on the high side of that tolerance, then stacking these tolerances, I could see how the pin may have seemed tight during installation but lateral force being applied the pin could have pulled it free. If the pin was so loose as to slide into the hole easily then we would have caught this during installation and scrapped either the pin or the extension. Of course the NiB plating adds about 0.0005" so this would make the index pin hole smaller by 0.001" meaning the pin or the extension would have to be waaaaaaaaay out of tolerance which should have been caught during assembly and QC.
Of course this definitely sounds like it is covered under our limited lifetime warranty and we will replace the barrel. Please email us at
ryanj@victoryridgesports.ca and provide the following:
Copy of receipt
Description of issue and events leading up to manifestation of the issue
Images of the product complete plus areas of concern
