Man that SSAR 15 buttstock is alot $350.00. and I don't like the way it looks. And I'm building a AR15 right now and $350 is almost half of the cost of my 5.56, But I give you one thing that bump fire is nice. Here in Clifornia I can only have 10 rounds and that flys fast already got to love the "RADLOCK". Just can't bring my self to pay that much for a buttstock.