Works great - SureFire SR Plug-In Tape Switch with Picatinny Rail Pad for WeaponLights

If you are looking at this, you know what it’s for: integrated dual switch (one for PEQ & one for surefire light). Plugs into the current surefire tail caps snugly. The 7 in this model is for inches of cord length (compared to the 9 model), which gave me plenty of length on my shorter rail. Switches work great. Switch’s polymer design snaps down on the rail with a decent amount of force but stays on snug without any looseness.