Keep in mind when getting a bipod that the MP15-22 has a long magazine which will keep the gun several inches off the bench. I have not measured the required distance, but it would need to be considered. I'm not sure 6" or even a 9" would get you up far enough to clear the long mag.

I wish S&W offered a 10 round shorter mag for bench shooting. The longer mag is nice but gets in the way when trying to shooting from a seated bench position.

Steve/Iowa