Have a 39TDS and 39A. The takedown had a Williams and the 39A had a scope. Bought one Skinner to put on the 39A to make it a little more durable for a truck and UTV gun in Wyoming. I liked the Skinner so much that I got another one and replaced the Williams with the Skinner on the TDS. They both look trimmer and more rugged and shoot good even with my 60 year old eyes.