Police were called to High Elms Manor in High Elms Lane on the evening of Sunday, June 12 after a large scale disturbance was reported.
A 28 year old man was shot in the shoulder and another inuured. One had been stabbed in the head at a party event in High Elms Lane, Abbots Langley in Hertfordshire.
Sharriff Dacres, 22, of Cotterells, Hemel Hempstead, was found not guilty of attempted murder, wounding with intent and possession of a firearm by a jury on the judge's direction at Harrow Crown Court.
But he was found guilty of possession of a prohibited weapon and sentenced to seven years in prison.
Alexander Dacres, 27, of Tudor Avenue, Watford, was found guilty of possession of a firearm with intent to endanger life, possession of ammunition and possession of a firearm without a certificate and sentenced to eight years in prison.
He also received a six-year term after being found guilty of possession with intent to supply a Class A drug, so will spend 14 years in total behind bars.
The 27-year-old also admitted two other drugs offences for which he received no further penalty.