My BCM SBR lower came registered with a BBL length of 10.5" I have an LMT SBR 10 with that BBL on it but plan to put a BCM 11.5" BBL upper on the BCM Lower, it's an inch longer do I need to notify ATF of my desire to use a BBL an inch longer?
When I spoke to ATF about a registered machinegun lower I wanted to find out about overall length. I was told, over the phone, the BBL length did not matter because it was a machine gun lower. Is it the same for the SBR? Thanks.
"Real men have always needed to know what time it is so they are at the airfield on time, pumping rounds into savages at the right time, etc. Being able to see such in the dark while light weights were comfy in bed without using a light required luminous material." -Originally Posted by ramairthree
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