[thewinnie]

Why did he reload every shot? Is it self made pistol? My best guess that insurance haven't paid his enough to buy glock17

[TrackerFF]

A bit technical:

Automatic and semi-automatic weapons work the way the do because force of the round (recoil) pushes back the bolt carrier, which a spring will then push forward again. Shot is fired, bolt carrier goes back, spring pushes it forward.

Subsonic ammunition have less charge than regular ammunition, to reduce the velocity. This also means less recoil. Combined with the spring now being too stiff, the bolt carrier will simply not move back far enough to successfully chamber a new round. So you have to manually chamber a new round between each shot. One solution is to use a light / less stiff spring that is adjusted to the force of the subsonic ammo.

Same principle for when shooting blanks.

[Clubber]

He also could have not been using a Nielsen device.

https://en.wikipedia.org/wiki/Muzzle_booster#Modern

[Molitor5901]

Perhaps subsonic rounds that did not have enough charge to drive the slide. It looks like there may be a suppression device on the end. My first thought was home made.

[Molitor5901]

Just an interesting note. Some in the media have suggested the weapon used is a B&T Station Six, a bolt action pistol. I had no idea such a thing existed. Reviewing the footage again I don't know if it is that model. The hand movement appears more chambering that cycling a bolt.

https://abcnews.go.com/US/police-piece-unitedhealthcare-ceo-...

[igetspam]

Or it could just be a single action pistol, as noted in the article. They’re not common but there are a handful of them that are relatively easy to obtain. Competitive shooters use them and it seems that Seals are sometimes issued single action pistols too.

[sergiotapia]

not a gun dude, but I read that it is common when using "subsonic rounds" for quieter shots.

[jerlam]

All of this seems to indicate this was a hired professional and not someone merely angry at their health insurance benefits.