DoubleTapDrew said:
It seemed like a few years ago in the AR-15 world, holding the magwell was all the rage. After that, it became en vogue to hold the handguard out as far as possible (and that's when midlength and rifle length FF handguards started showing up on everything). I'm not sure which is "better" but it seems like holding the rifle further out would allow for quicker, intuitive transitions on multiple targets (seems like the 3-gun guys started doing it first), but may allow more muzzle wavering on distant targets from that unsupported hand out there.
I may be way off base but that's just my take on it.
No, you are very much on-base! The far forward support hand technique for CQB is all about muscling the barrel onto target, which you have to do in a dynamic environment involving moving, and targets presenting in different places. It allows you to control your muzzle more quickly and more precisely than other methods, but you are still ultimately relying on your muscles to hold up the rifle. This is necessary for CQB, but it is the OPPOSITE of what you want to do for precision marksmanship. Precision marksmanship is all about minimizing muscle input. That's why precision shooters use a loop or hasty sling, or a bipod, or sandbags... it allows you to relax your support hand, and use solid, consistent elements like bone, sling, and ground to build your position instead of muscles.
Personally, I like to have my serious battle rifles set up for doing both CQB and precision. The best method I have come up with so far is a 1 or 2 point tactical sling for carrying the rifle, but also an M-1/M-14 issue GI web sling attached to the support arm in the "loop" position, with an extra hook or a QD swivel on the front, so it can be quickly attached and removed from the rifle. You can use the far-forward support hand method for CQB, and then if you need extra precision for a longer shot or a smaller target, it's as simple as hooking up the GI web sling, wrapping your wrist, and taking a solid position.
If you know what you are doing with a sling, you can get just about as stable as you could with a bipod. However, it is a lot more versatile since it can be used in any position, and it takes up a lot less weight and bulk than a bipod. It also actually keeps the rifle in your shoulder pocket, unlike a bipod, so it is great for rapid fire.
I don't put bipods on anything except for long range bolt guns that are intended to be fired slow fire from long distances.