Hey Doc, you asked about my rig and what you said applies to my rifle. There is enough room for proper hand position and a bipod installed, but those that follow will say, "Why have all that extra weight on a carbine! You will never need a bipod to shoot a carbine!". Take it for what it's worth and consider the source and make you own decision.
The Versa-Pod takes up a little less space and may be what you are looking for. It also has a quasi-hand stop built into it. It will have your bipod sit a little forward of your handguard also.
OR you could use a Harris, like I did and still be OK for what you want. Mine is installed more for picture posing than anything else, but I sight in all my rifles with either a bipod or bag, so if it has a rail, it likely gets sighted in with a bipod. With the PRI tube, there wouldn't be enough room for a FVG and a bipod, but other rail systems like KAC, DD, LaRue, etc. have more rail real estate for mounting multiple accessories.