Mike,
Yes, it is their 1/5 scale Lewis kit. There was a time that I provided design work for them, and in return aquired various parts/pieces to one-offs and prototypes. I was going to use this kit on my Proctor N-11, but opted to build the N-16 version instead, since I had their 1/5 scale Vickers kit on hand, and not many '16's get modeled.

The Williams Bros kits are great, but limited to certain scales. I'll send the 1/5th Lewis to you, PM your address to me.

John