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Another Hooligan
I have a question. I recently purchased a virgin lower. Built it into a pistol with a 10.5 inch barrel, kak blade, etc. Now, I recently purchased a 450 bushmaster upper. I want to test the new upper and want to know if I can legally install the rifle upper on my lower with the pistol buffer/blade. Only to function test a few shots through the upper. I can’t imagine the blade being too comfy with the added grunt of the bigger cartridge. Any help is greatly appreciated!!