It is separate loading cased charge ammunition (shell and cartridge loaded into the gun separately) with electrical primers, in contrast to the widely used semi-fixed US 105 mm M1 type ammunition (called "105 mm How" in UK service), which uses percussion primers, and has shorter shells.

Mark 2 adopted a new projectile design, including an improved lethality high-explosive (HE) shell (heavier with more HE) and full charge cartridges.

Its shell types include HE, Smoke, Coloured Marker (Red and Orange), Illuminating, and HESH for direct fire against enemy armoured vehicles.

Sub-zones 1 and 2 were only used to provide short-range in high angle fire and were soon replaced by a plastic spoiler slipped over the shell ogive.

The Abbot was fitted with both line and radio Larkspur B48, then Clansman UK/PRC 352) communications to its battery command post, which used the Apparatus Loud Speaking No.

AWDATS displayed firing data transmitted from FACE in the battery command post via line or radio.

A small number were purchased by the UK for use at the British Army Training Unit Suffield (BATUS) in Alberta, Canada.

A SPAAG version using an unmodified chassis with an alternate turret mounting two 30 millimetres (1.2 in) HSS 831L cannons was prototyped as the "Falcon" but limited ammunition capacity of only 310 rounds per gun led to its cancellation.