43 C.F.R. § 423.30
(a) You may possess firearms, ammunition, bows and arrows, crossbows, or other projectile firing devices on Reclamation lands and waterbodies, provided the firearm, ammunition, or other projectile firing device is stowed, transported, and/or carried in compliance with applicable Federal, State, and local law, with the following exceptions:
(b) You must not discharge or shoot a weapon unless you are: