I can make custom variants on request. I do not recommend that a lower rail is added to the clamp for bi-pod use due to the size and weight of these guns.
This item is made to order. It takes a printer a whole day to make and can be longer due to demand, printing errors and shrinkage. I will keep you updated during manufacture.
Air tanks vary in diameter slightly. To order a clamp you must measure your tank diameter with a Vernier gauge in at least three places and send me the dimensions first. I will then advise when it is ready to order. It is very important that you include your email address when ordering.
Please also check your barrel shroud diameter against the drawing.