@ squinting-archivist on Instagram posted a video from the Balkans in the 90's and we get a glimpse of this @HecklerAndKoch HK21 in US service!!!!

@ps1911a1
@historicfirearm
@JakOSpades
@AbraxasSpa
@tacticalporn
@jmscaronte
@LeighJNeville
@2805662