This summary is not the rule. The rule text controls.
When a grand jury issues an indictment, the court can order either a warrant for arrest or a summons telling the person to appear in court. This rule says those documents follow the same process already set out in Rule 4, which covers warrants and summonses based on a regular criminal complaint.
In practice, this means there is no separate or different process just because charges came from a grand jury indictment instead of a complaint filed by a prosecutor. The same rules apply for how the warrant or summons is written, how it gets issued, how police serve it on the person, and how it gets returned to the court afterward.
For someone facing charges, this means the process feels the same regardless of how the charges started. Whether a prosecutor filed a complaint or a grand jury issued an indictment, the person will be arrested or summoned to court in the same way, with the same protections and procedures in place.