Atlas Bipods LD 1/4-20 Lever Adapter Black. Once the is installed on your supporting device using the 1/4-20 threaded hole found on the and is completed with a lever mount of your choice your Picatinny Rail equipped Rifle Pistol or Shotgun can be quickly mounted and held to your supporting device. This is a great option for getting added support for hunting and tactical situations where a bipod is not practical. The will hold your supporting device to the firearm for transitioning or relocation of firearm. The Picatinny Rail lever mount is not included however both the and ADM 170-S can be ordered together as our -L Package Contents: Atlas Bipods LD 1/4-20 Lever Adapter Atlas Bipods BT56 LD 1/4-20 Lever Adapter Black