Per Amazon Q&A answer
A: The issue of fitment is with the length of your action slide tube. Older models have a 7 3/4" length tube, as where newer models have a 6 5/8" tube. Most aftermarket forgeries are designed to fit 7 3/4". I believe Hogue makes an adapter for the shorter tube, you can check directly on there website. I recommend purchasing the wrench for removing/installing the tube, as this job can be a real PITA!! I hope this helps. I really like the Hogue furniture by the way, a great upgrade.
Credit to Nevada Smith