If you have any concerns regarding the GS3 MP Group Cap features, abilities, or fit please contact consumer service here or pop into our live chat feature to your lower right. This item is eligible for a return unused within 30-days of the shipping date. To make a return contact us via the contact us page for an RMA#. If an RMA# is not present on the outside of the box, no credit will be issued. Full Shipping Policies & Full Returns & Refund Policy
This part only works on the MP model will not fit on volumetric version.