I will try !
Additional info on Vietnamese 50mm Silent mortar:
Lee Ann Quann @AnnQuann (https://mobile.twitter.com/AnnQuann)
“Caution: the base plate is for the ground, not for the knees. Spec sheets of STA-50 silenced mortar of Vietnam People Army released during the Army Game 2021 exhibition. In theory, it only takes one man to use STA-50 to quietly drop a barrage of shells on targets within range.”