I originally didn’t care about that when I form 1d my mp5 clone. I love the look of the A3F so I bought one. As soon as I put it on and held it up to my shoulder I couldn’t believe how far down I had to place my neck to get a sight picture. I heard it was inferior to the A2 but I didn’t think it would be as bad as it is. I tried shooting with it a few times and scrunching up my shoulder so I don’t have to put my head down as far but it just gives me a neck ache after a few rounds. Last week I got an A2 and I can’t believe the improvement, it almost is as comfortable to shoulder and get a sight picture as an AR. Am I doing something wrong or is it really just this bad? Only way I can get a good sight picture without stretching my neck down or my shoulder up is by putting the bottom point of the stock in my shoulder opposed to sitting the curve of the stock in my shoulder (as stocks should be used). If it is really this bad how the h3!! did this design make it out of the test period of the development stage at HK?? I feel like the stock needs to go down another 1.5inches or maybe it was designed to be used with optics on the claw mount??