The float tube itself simply unscrews from the tube nut. However, you'll need to mark where you want to place the stud before unscrewing the tube. If you already have your bipod's attachment bracket make sure your bracket will be in a comfortable position (not overhanging the end of the handguard when installed or not too far back on the handguard). I have the DPMS Sweet 16 bull-barrel complete rifle and the harris bracket really takes up too much of the shortened (16" bull-barrel) handguard surface area for my liking, but being this is strictly a varmint rifle, I really never fire from anything other than the bipod anyway. Once you're comfortable with the location of the hole for the stud, mark it with a pencil, remove the tube (on the Sweet 16 Bull, the float tube will slip over the gas block, so there's no need to remove it), and use a punch to start the stud at your mark, then drill out a 7/32" hole for the stud. To make things much easier, put the stud through the hole and start the jam nut just enough to get hold of the stud. Now, re-install the float tube. If the stud hits the gas tube while tightening up the float tube, you'll need to back out the stud just enough to get clearance over the gas tube. Depending on how far back you want your bracket, it becomes a little tricky to hold the jam nut in place while tightening the stud. Small pliers or a small screw driver should be sufficient to hold the jam nut while you tighten the stud. Again, I have the bull-barreled Sweet 16 (no sights), so you may not have the same trouble or you may have other concerns (front sights, etc.), but my float tube has returned to the same spot everytime. I didn't have any problems or complaints about the DPMS stud. DPMS doesn't install the stud for numerous reasons - they don't know whose bipod you'll use, and presonal preference of the shooter with respect to location of the stud are just a few. I however, like the jam nut idea - but just for insurance I applied a small dab of locktite to the stud threads before tightening up the jam nut. After removing the bipod and re-installing the bipod (and shooting the weapon) I have had no problems with the securedness of the stud. Good Luck!