The Bristol Gunners were called back to arms in 1971 when the army determined that they needed better integration between the Regular Army forces of the British Army of the Rhine (BAOR) and the volunteer reserves. A new unit was formed, 266 (Gloucestershire Volunteer Artillery) Observation Post Battery RA (V). The role of this unit was to train eighteen observation post (OP) teams which in times of war would reinforce six artillery regiments in BAOR divisions with three additional OP teams each. The Bristol Gunners were supplied with three obsolescent, but effective and much loved, 25 Pounder Gun Howitzers. Over the next twenty years the Bristol Gunners fired many thousands of rounds from these guns on Salisbury Plain, Sennybridge, and Otterburn Ranges. They also carried out many reinforcement exercises to their regiments in Germany and Denmark, and exercised in Cyprus and USA.

The fall of the Iron Curtain and collapse of the Soviet Bloc in 1989, as well as the invasion of Kuwait led to changes in UK defence thinking. The Bristol Gunners changed role to a gun battery, being equipped with the modern L118 Light Gun. They became a 4th battery for 7th (Parachute) Regiment RHA, the artillery support regiment for airborne forces, in 1991, and were titled 266 (GVA) Parachute Battery RA (V). In 2001 they changed role again, becoming 266 (GVA) Commando Battery RA (V), the designated reinforcement battery for 29 (Commando) Regiment RA.

In 2013 further defence reviews led to The Bristol Gunners changing role and title again. They are now known as 266 (GVA) MUAS Battery RA, part of 104 Regiment RA within the newly named Reserve Forces. MUAS stands for Miniature Unmanned Aerial Systems. In this role they operate small reconnaisance aircraft which provide a means of force protection and target aquisition .