The bipod is what makes it effective -- but only if fired from the prone position, or from a trench or foxhole. Bipods are post-WW1. The first one, on the M1918A1, was better positioned (on the gas cylinder) than the A2 one. But the A1 bipod had spiked feet, which didn't work too well on hard surfaces such as pavement. The A2 bipod, although it had skid feet, had the worst position, right at the muzzle. Plus, it flopped around a lot. No wonder the gunners wanted to ditch the bipod. But in doing so, they would give up a lot of the gun's effectiveness. A silly development was the butt monopod. That was dropped in a hurry. Today, having one of the butt monopods is something to brag about, for a collector. Somebody is actually reproducing them. Another accessory was the carrying handle.This came out right at the end of WW2. (In the movie The Longest Day, a BAR is shown with a carrying handle. That would have been anachronistic for D-Day.) If you own a BAR, please don't mount a carrying handle. That will wear a groove around your barrel.