The MRP-L 11.5" Quadnose Upper is a modified 13.25 Quadrail upper. We will take your supplied 13.25" quad upper and shortened to the same 11.5" length as Shovelnose upper and cut a section to fit around the normal LMT piston gas block.
We will clean up the cut end with a light chamber and apply Alum-a-black to the bare aluminum.