Drift117, give him a PM.
Подай набої, є що стріляти. Think Plink!
Just because I can (No disrespect to the efforts of Wolverine & Kodiac).
From the dimensions given above I believe the interference is due to the head of the gas pistion and not the gas block itself.
If I extract that the sketch origin for all 3 screenshots represent the centre axis of the gun barrel (or reference axis for this discussion) then the top of the gas block height (1.047) is less than the cutout of the handguard (1.062).
It is only when you add the gas piston to the assembly that the dimension given show an interference (1.067) vs. (1.062) of .005 using basic dimensions.
Since I do not know what the actual tolerances were for each dimension issued for fabrication - it could be that the prototypes were at the loose end of the tolerances (no interference) and production tolerances result in stack-ups that may (or may not) result in interferences.
Changing dimensions on the outer dia of the gas plug may solve the problem if technically feasable (I cannot see a side view of the assembly or minimum engineering requirements for said parts).
Hence, this is speculation on my part and my working theory may (or may not) have any validity.
My rifle should be delivered by Canpar today and I am eagerly looking forward to taking the rifle out for a spin.
When I made the deposit back in the beginning of Feb I did so with the understanding that the gun was a work in progress.
Because it was Canadian made I wanted to support both companies.
In the ensuing months as releatively small issues were discovered it became apparent that I had a vested interest in the development of this firearm.
In fact, I would surmise that this happened to a lot of purchasers, as indicated by the emotional investment that I have read in this and other forums.
Its been kind of cool to watch the evolution of the specification has occured based on feedback of customers. In addition, the sharing of field expedient fixes for ejecting brass marking up the receiver was brilliant.
I think everyone should give themselves a pat on the back on how this "Canadian" rifle has (and continues to evolve). I look forward to the 7x62 upper that I can mate to the lower to see if my ACR mags will work.
Cheers,
L
Last edited by lmar; 10-16-2018 at 03:20 PM.
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"If sense is so common ..... why is it in such short supply?"
Filing Fixture Request
I am trying to come up with a filing fixture to allow for the clean modification of a Magpul K2+ pistol grip for use on the WK 180.
My ADHD from hand fitting the grip via use of a dremel tool is causing me to lose sleep.
Is it possible to get dimensions or a portion of the CAD model (Solidworks?) of just the area outlined by the red rectangle.
The vertical and horizontal pistol grip "shelf" of the model will allow me to position the grip in the fixture.
The dimensions of the radius (or model) will allow me to get a better fitment and allow users to do so consistently.
Thanks,
L
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"If sense is so common ..... why is it in such short supply?"
the magpul MOE-K grip comes non-beavertail and is also at a steeper angle like the K2. I think the K2 is slightly longer. If you don't have really large hands the K should work.
https://www.magpul.com/products/moe-k-grip-ar15-m4
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"If sense is so common ..... why is it in such short supply?"
Now I have realized there is another issue with gas block clearance. I found that when you hold the rifle firmly by the handguard you can grab the barrel and wiggle it and the barrel/ upper moves quite a bit within the handguard. Enough that the gas block will contact the handguard if you push it up all the way. Is this normal with AR 15 handguards? I checked the 8 mounting screws and they are all very tight.
I can't imagine this is good for accuracy if the barrel jumps around within the handguard while firing and possibly contacts via the gas block. Might explain some of the flyers I'm getting.
Any fixes for this? I'm considering maybe trying a pressure screw or something between handguard and barrel and forgetting about free floating. Might be more stable.