>>64070624
I use the shooter global Go timer, which works surprisingly well at an indoor range when you lower the sensitivity. If the range is loud I put it on some ammo boxes next to the muzzle and lower the sensitivity

>>64070972
JMCK or Legacy Firearms Co.

Langdon in one of his videos has a retention holster for his px4 full-size, I don’t know what it is. I remember Bereli was selling Px4 duty holsters at one point but they weren’t optic cut.

Ronin Leather Works can make a custom leather one.