Devourer

A creature with two or more ranged bioweapons may only choose to fire one of them per Shooting phase unless it is a Monstrous creature. A Tyranid that carries two of the same ranged weapon symbiote counts them as twin-linked.

Ranged bio-weapons have a Strength equal to the creature firing, modified as shown in the bioweapons profile. The Toxin Sacs bio-morph does increase the Strength of ranged bio-weapons carried by the creature. Bio-weapons are limited to a maximum Strength as noted in their profile.

Many bio-weapons are Assault bioweapons are Assault X weapons. These get one shot per Attack on the creature's basic profile (ie, before being modified by other factors), so 2X weapons get twice the creature's Attacks in shots, and so on.