Billed as being able to fit any pistol with an M1913 Picatinny style accessory rail, the Accelerator from Tandemkross promises a universal thumb ledge to help with accuracy, especially in rapid fire.
The reason this is important is that other “gas pedal” style ledges often require permanent modifications to the handgun or replace the takedown lever while the new example from Tandemkross can be easily added or removed with no damage to the host pistol.
The Accelerator thumb-rest is made of 6061 aluminum and is anodized black or red (don’t be that guy) to compliment the firearm’s frame. The cost is $59 ish.