Nigel Brown has made a stab at serialisation in his Brit Gunmakers Vol. 3 - looks like it has been put together from actual guns.
There is a record (according to Crudgington & Baker) of Reilly paying 'royalties' to J D Dougall for use of the Lockfast patent whuch would point to him being a practical gunmaker. On the other hand there are no patents under his name listed by the same C & B.