Originally Posted by shnorse
Full auto fire is illegal in most states...
Huh? Sorry but that's absolutely incorrect.
AL, AK, AZ, AR, CO, CT, FL, GA, ID, IN, KY, LA, ME, MD, MA, MN, MS, MO, MT, NE, NV, NH, NJ, NM, NC, ND, OH, OK, OR, PA, SC, SD, TN, TX, UT, VT, WV, WI, & WY all allow ownership of "machine guns." That's 39 out of 50 states leaving 11 that do not allow it. How does 11 out of 50 = most?
As for the bumpfire stocks, The Slide Fire Solutions SSAR-15 is the only one I've found, so far, that actually works. And it works very well.
A Review of the Slide Fire Solutions SSAR-15 Bumpfire AR-15 Stock
The Timney Trigger kicks ass but I have not tried bumpfiring with it.