Green’s Dictionary of Slang

glock n.2

[generic used of the brand-name Glock, founded in 1963]

(UK Black) a gun.

thewire.co.uk Oct. 🌐 There are many terms for guns [in grime music], for instance, usually single syllable words that can be dropped quickly: heat, skeng, shotty, pumpy, glock, gat, and so on.