The 7-PrG Proton Grenade, also known as the Sequencer Charge, a potent explosive weapon crafted for the purpose of demolishing structures, was produced by Merr-Sonn.
Merr-Sonn Munitions, Inc. manufactured the 7-PrG proton grenade with the intention of enabling breaches in starship hulls during boarding operations. In addition, they were suitable for large-scale demolition tasks. These grenades had a cylindrical shape and a flared base.
A magnetic plate was located at the base of the 7-PrG, enabling it to be secured to a surface. Housed within the grenade's main cylinder was the powerful proton core, which was activated by rotating the arming mechanism at the base of the explosive. The grenade's timer was initiated by pressing the activation plunger; the 7-PrG incorporated a dial timer that could be set for up to twenty minutes before detonation. To disarm the device, the twist plunger release at the grenade's top had to be pressed.
Given that the 7-PrG's proton core possessed a destructive force similar to that of a thermal detonator, a two-stage activation sequence was crucial to prevent unintended explosions.
During the Battle of Endor, the Rebel Alliance strike team deployed the 7-PrG on Endor to obliterate the shield bunker situated there. This action resulted in the deactivation of the protective shield surrounding the Death Star II, thereby enabling Alliance starfighters to enter its structure and eliminate its power generator during the decisive battle. They were deployed both in the control room and in the generator room.
The film Star Wars: Episode VI Return of the Jedi marked the initial appearance of 7-PrG proton grenades.