Need advice. I plan on doing my own build starting with a milled lower. All legal parts, action and barrel length. Is it OK to take such a platform to the range? How do range owners look on this? Is it frowned on? Will I get kicked out? If someone notices the lower is milled or doesn't have a number will someone report me? Does anyone even care about this at most ranges? Is it even legal to be asking this question? Or is it safer to just start with a serialized lower? I want to do everything legally but I really want to do my own build since I always build everything and my ideal parts lists covers many different manufacturers.