"Two guards armed with Fabrique Nationale Herstal P-90 submachine guns stood at the entrance beyond the helipad, their presence negating any possibility of unauthorized access. Bolan hadn't expected to waltz through the laboratory's front door, but he wanted to view it nevertheless. He took the opportunity to examine his opponents' hardware. In addition to their submachine guns, the sentries wore shoulder holsters carrying FN Five-seveNs. Weighing a mere 1.6 pounds, the Belgium-made pistol used the same 5.7 mm ammunition as the P-90, fed from a clip holding 20 rounds. Although the lightweight handguns lacked the punch that a 9 mm Glock or a Smith & Wesson .45 might deliver, its bullets were available in a version with steel-hardened tips that penetrated Kevlar, making them the ideal choice when anticipating an assault by law-enforcement personnel."
January 1, 1970
https://en.wikiquote.org/wiki/FN_P90