I really like Harris bipods. Have used them for a long time. Bought my son Harris bipods for Christmas a few years ago.

The tilt bipods are much more useful than the non-tilt. Though I can see saving some money if you are 100% sure you'll only be using them from a bench.

Having said that, I found on my Remington R15, which has a free float tube, that it shot worse groups with a bipod. Ditto another AR15 rifle with an A2 forend and Harris adaptor. Some other AR15s have not had an issue. The two AR's that had problems with a bipod shot excellent groups from a heavy rest. Only thing I can think of is the bipod was allowing some sort of harmonic to get set up or was allowing the gun to prematurely move under recoil (before the bullet left the bore). This does not mean you will have problems, but the possibility is there.