I have never seen any rifles but have seen a few pistols and fowling piece by the Bumfords. Probably the one you are familiar with seeing is the second John who apprenticed under Thos. Hardwell in 1742, asst.1746' master in 1751 and 1756. Located at the sign of the golden blunderbus, St. George st. in the Minories, London.Was contractor.to.East India and Hudson's bay companies., died 1775 (Blackmore)