8/19/26:  This is the placeholder to get on the notification list and we will load it up with parts when done.

7/7/26:  We have a Platypus version in the works so the modifications previously done for free will not be an option.  This version will be the best solution vs the hand modification.

The Nitro Fin 2.1 is the best slide stop thumb rest available for 2011 Platypus.

Beautifully finished in Black Nitride.

THE NITRO FIN DOES NOT LOCK THE SLIDE BACK ON AN EMPTY MAGAZINE.

It is machined from a single piece of 17-4 stainless steel and is available in machined polished or black nitride.

The Nitro Fin pin size is 0.1990 +0.0005 / -0.0015. In most applications, if your pin size matches, all you need to do is slide it in and you’re ready to run a thumb rest on your pistol.

With every custom-built gun, a proper mock-up is recommended. We demonstrate this in the instructional videos shown below.

Version 2.1 Highlights

THUMBREST PAD REDESIGN

The pad is now 0.150 wider. This update came from feedback from USPSA Open shooters using wide scope mounts. We also flattened the pad based on years of shooter feedback. Additionally, we undercut and reduced the rear section of the pad to eliminate discomfort when shooting weak-handed.

PIN QUALITY OVERHAUL

The new pin features no taper and tighter tolerances. It is also slightly longer to aid in removal and to accommodate wider frames.

LOWER THUMB SHIELD UPDATE

Some users reported contacting the shield while racking the slide. This area has been refined to improve clearance.

PLEASE READ: Shooting Sports Innovations stands behind all of its products.  If you have an issue, let us know.  However, firearms are inherently dangerous and must be treated with respect at all times.  Please make sure you are fully familiar with your firearm, how to use it safely, and that you follow the four rules of firearm safety at all times.  Shooting Sports Innovations cannot and will not be held responsible for any negligent use of any firearm or Shooting Sports Innovations products.