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Nice build. If I may, try to find an A1 stock, try that out. If lucky you can find them reasonable, usually military take offs. If you can live with rack numbers....
I like this stock and prefer them to pinned adjustable stocks. I built it to be a short gun, it has the 14.7" barrel ( legal with permanent muzzle break).
A1 stock would look great. I might do that at some point.
It looks like you are using the fixed cabine stock. You would also need a rifle buffer tube, spring and buffer to switch to an A1 type stock.