Well worth the $$$ easy install - SB Tactical 590-SBL Stabilizing Brace Kit for Mossberg 590 Shockwave

Super easy install. All you need is a set of SAE/US Allen wrenches. A bit of thread locker is optional. I went slow, read the directions, and de- greased all the surfaces as I went. Still took all of 5min or less.It is well made. Can feel the quality. It fit w/o any tinkering. I am not one to skirt firearms laws, but ATFE has given this the green light. Even to be fired from the shoulder. Is as good as any SBS w/o the 200.00 stamp, need to let ATFE enter your home to inspect it or need to file paperwork if you travel with it. Be sure to check local laws. The Shockwave is not welcome in a few states and cities.