Your guess is Group-13….
A) Chemical elements of the periodic table, comprising boron (B), aluminum (Al), gallium (Ga), indium (In), thallium (Tl)?
B) A secret team of ex-Special Air Service (SAS) and military intelligence operatives said to involve deniable covert actions run by MI5 and or MI6?
C) A cadre of crazed machinists, artisans, & agents who were once lost, but now found who share common ground for design, manufacturing, and creating some of the worlds finest precision firearm accessories?