Brace on my ar 9mm - SIG SAUER SBX15 Pistol Stabilizing Brace

I bought this to put on my AR 9mm pistol. Everything worked great with the exception on sliding it down the buffer tube. That about wore me out and had to get a friend help get it the rest of the way down. On the plus side of it being so tight, I don't have to worry about it falling off! Other than that, I truly enjoy it and Optics Planet sold it for a very good price.