vegas smg thanks for the question. if you look on youtube as well as on some of the bazookabro. esp the older ones that were on the site you will see me standing on the line at knob creek shooting the m11 and the hk, you will see a guy with his uzi standing and you will see a guy with his m16 standing at the range. most of the videos are shot of me shooting and i am running the camera also and it is easier for me to site the camera in on an empty chair before i film me sitting on the chair. also in most of the videos i have been testing dozens of adapters and had been firing thousands of rounds after a long day so i get tired and sit down. if you would like more standing videos ; will do. i originally shot videos in short bursts ( which is much more of a test of reliability than a drum dump + i was trying to save my barrels after several hundred thousand rounds of ammo ) but everyone thought the gun would not do a reliable dump so i did dumps and then we got emails wanting to know if the guns would functin in bursts !! where you hold the weapon can effect function for the simple fact that if your sleeve even drags against the moving drum it can upset and cause a hitch and that doesn't matte what gun you are using. i have seen many folks sware up and down that they didn't do it and then i take there gun and run it with no hitches and they still don't want to believe it was their error. i wish this wasn't so but i guarantee it is because i have messed up my own running and have had to figure myself what exactly was going on. also there are so many guys guns that are not running 100% againa and again with 40 rnds and then they expect for it to run 100% with 165 ; it just isn't going to happen. a clean gun isn't necessarily clean just in their opinion. most guys who have not dealt extensively with .22 smg have no idea what all is involved in getting a .22 smg to run reliably. when you do a caliber conversion such as lage has done it is even more of a miricle especially with all of the different make guns and tolerence variations. the most reliable .22 smg conversion or original is the hk .22 conversion for the .308 guns by far. i have owned and/or shot virtually all of the .22 smgs out there including browning 1919 with a .22 conversion, am180, norrel 10/22, lakeside, voere, and the list goes on and on. i have put over 600,000 rnds thru the hk with a couple hundred drum dumps in that number and just broke my 2nd part. an extracter at 225000 and a firing pin at 600000 + rnds. it still ran 4 drum dumps with the broken pin ! i wish all of the .22 conversions were that great ; just not so , but lages is a definitely a good one and it is just as good standing as sitting but there is more that can interfere standing.