Armed officers were called to the scene of a road traffic collision in Huddersfield.
The crash took place on Norwood Road in the Birkby area at about 12.55pm on Friday 24 May and involved a white Audi and a motorbike.
A gun and ammunition were recovered and enquiries led to the arrest of seven males aged between 14 and 21.
Two males aged 18 and 14 have now been charged with conspiracy to possess a firearm with intent to cause fear of violence.