1. Harris Bi-pods have been around for donkeys years and represent the go to bi-pod for many shooters. This is because they are built to last and there are loads of variations to choose from: long legs, short legs, tilt and swivel etc etc. The clever mechanism allows them to attach to any standard QD sling stud. They are priced from £80 to £140
2. The Primos gen 2 trigger sticks (tripod) are a real game changer in my eyes and I just so happen to have bought some for myself! They are incredibly versatile, allowing massive amounts of adjustment simply by depressing a trigger and moving them about. This can all be done silently with one hand while the other supports your rifle. They even work on uneven ground! Prices start at around £115
4. Caldwell Deadshot Shooting Bags are a very popular method of supporting a rifle no matter where you are. You can fill them with what you like, a dense sand like zirkon would work well. It depends how far you have to carry them!