Jaylah's stick
Jaylah's stick was a tool used by Jaylah on the planet Altamid, which functioned as both a staff and a rifle. ()

Appendices

Background information 
Though not fully described in the film or script, the term "Jaylah stick" was used to described the object, which comes from a sketch shown in the featurette "Properly Outfitted". (Star Trek Beyond - Collector's Edition special features) The same concept art named John Eaves as the tool's designer.

According to Jaylah actress Sofia Boutella, Jaylah's weapons were made by Jaylah herself. (SFX, issue 276, p. 49)

Mounting Jaylah's staff on Sofia Boutella's back without it bouncing around even when she had to remove it was, according to  Property Master Andrew M. Siegel, "always difficult." The film's creative team therefore created a blocking mechanism for the actress' back. ("Properly Outfitted", Star Trek Beyond - Collector's Edition special features) A pair of concept diagrams of the equipment on Jaylah's back can be seen at .

After the team invented the blocking mechanism, the idea of increasing the tool's versatility came up. "We thought, 'Oh, she needs a rifle later,' so rather than give her some unmotivated thing," recalled Andy Seigel, "we went, 'Oh, okay, what if she just takes her staff, and we take pieces off and add pieces to it?" ("Properly Outfitted", Star Trek Beyond - Collector's Edition special features)

After its on-screen usage was finished but before the release of Star Trek Beyond, the stunt prop of Jaylah's staff was won – at a celebratory fan event held at the Paramount Pictures lot on  – by Doyle Zhang, who had flown from Shanghai to attend the event. (Star Trek Magazine Movie Special 2016, p. 94)

Apocrypha 
In the fifth issue of IDW Publishing's Star Trek: Boldly Go series, this device was first used by Jaylah's older sister  during their defensive training.

External link 
 

Alternate reality
Hand-held weapons
Directed energy weapons
Memory Alpha articles named from supplementary resources