Jim I want to use the nose guard from a MkIII rifle and attach it to !" steel tube stock. This will fit into the AA retainer on the MKI bipod . I will have to re-fabricate it in order for it to slide into the side tube on the bipod, where it is stored when it is not used as the third leg for AA purposes . I have a nose guard on order from Gunparts Corp. .Cutting and reworking the nose guard will be interesting in the least !!!