Quoted:
It's soft rubber..the same used to make prosthetics. Much softer than a buffer tube...so basically the buffer tube would make a much better stock if that is your intention. My intention was to give those with some kind of handicap the ability to fire this weapon the way it is defined and intended to be fired...with one hand...but...it does help anyone fire better from the one handed position. My favorite gun to hunt with is the TC contender pistol in .308. I'll swear by that gun and I'm not lugging around a full size hunting rifle. That's another gun I'd love to develop the SB for and what I am presently working on. Most of my friends dont understand my love for pistol hunting...but they are starting to understand it now. ;-) As for those who don't understand how or why ATF approved it, I'd read the approval letter.
Thanks
It's made of soft rubber, that makes a lot more sense. I think the thing for me was what appeared to be a cheek rest on the stock. Don't get me wrong man, I'm not bagging on your design, I like it to be honest, but I am just surprised the ATF gave you the go ahead, pleasantly surprised, but still surprised.