I want to build a new 300 Blk AR style pistol, which is a hybrid of the DDM PDW and the MK18 by Daniel Defense.
The gun will have an AR lower, 10.3" barrel, a Maxim CQB brace, and the Law Tactical folding stock adapter.
I don’t want this to be considered a SBR because it will have no stock and no fore-grip, but what do I need to focus on with regard to Overall Length and Length of Pull in order to comply with the law? Does adding the folding stock adapter affect how these lengths are measured? Primary source citations would be appreciated here.
I don’t intend to register the gun as an SBR, so I want to be sure it continues to fit the pistol definition as I work on it.