It's admirable to try and play nice with 922(R) guidelines. However, unless you are already in the line of night vision sight of criminal law enforcement prosecutors no one is going to check your firearm for minutiae compliance details against the "list" of items to be compliant. IF the lawman ever comes knocking to inspect and itemize your firearm accessory list you are in heap of deep legal ginsha. Be quiet, drop your dime to your lawyer and await his/her arrival. This would be a "add on" prosecutorial charge to have the long arm of the Feds to punish you further. Just for fun try to cite a single case in modern history where some poor soul was prosecuted on 922(R) during routine traffic stop, at the local gun range, selling their firearm online etc.