Installation of Riot Balls/KTS High Power Upgrade Valve for Umarex HDP
17:10
home defence 24 tuning kit umarex hdp 50 gen2 in deutsch #umarexairguns #prepper #emergency #airsoft
27:40
(Gun 55) HDP50 Power Modification
10:25
Makeit ForDefense
12:46
Power Kit Revolver Umarex HDR 50 ~ 30J
11:16
Best SLUGS for HDR 50 RAM. Make them yourself with BallMAKER Mold. Instruction & Shooting Test.
11:08
Umarex HDP50, No Restrictor, Steel Balls
15:02
Umarex HDP50, Open Valve
9:01