Finish the rear end with filler blocks or sheet as shown on the plans.

Angle cut filler blocks are available to cater for hips and mitres etc.

Filler blocks are available ex-stock for all CA profiles.

Under the conventional theory of construction from stone, however, the use of filler blocks and mortar presents no difficulties.

This magazine has a filler block that prevents it from being used with "normal" (i.e. bulleted) cartridges.

With only minimal funds available, the earliest T44 prototypes simply used T20E2 receivers fitted with magazine filler blocks and re-barreled for 7.62x51mm NATO, with the long operating rod/piston of the M1 replaced by the T47's gas cut-off system.