Blasters3D 14mm Adapter for Yewdrum Glow in the Dark Activator Tracer Unit - Simulates Gun Muzzle Flash and Live Firing on Airgun, Airsoft Gun, and Gel Blaster M1911 handgun It attaches to the back

It attaches to the back of the Rival top rail and makes the cocking mechanism much easier and more ergonomic to pull

You can get the Mark 23 airsoft pistols from Amazon here:

Nerf blasters

you can use this adapter to make it work

which provides the following functionality:

Blasters3D 14mm Adapter for Yewdrum Glow in the Dark Activator Tracer Unit - Simulates Gun Muzzle Flash and Live Firing on Airgun, Airsoft Gun, and Gel Blaster M1911 handgun It attaches to the backThis Blasters3D product allows you to attach the Yewdrum Glow in the Dark Activator Tracer Unit to your airgun, airsoft gun, gel blaster with a 14mm muzzle thread. The tracer unit (not included) emits flashing light when projectiles passes through, simulating muzzle flash when you fire. This adapter allows you to attach the tracer unit mock silencer toy to simulate live firing. Blasters3D muzzle devices are inspired by past theater of wars, modern