Everyone said get the G43 version. I did, and it doesn't work.

First off, I got it to lock finally when taking the RMR off, so that's an issue. Even when it did lock, I could never get it tight enough to where it wasn't just flopping around inside like crazy. Then for insult to injury, something on the plastic locking part gets caught in the cut in the compensator when pulling the pistol out.

The model I tried was the 6354DO-6832-741

Glock 19x
Trijicon RMR
Zaffiri Precision 'Blowhole' Compensator

Anyone know what would work? Thought this would be easy lol

the comp makes it longer than the glock 34.

have you tried taking out the bottom plug from the holster?

I have a G45 with an RMR, TLR1-HL, and Faxon Arms comp on it. I'm using a similar holster, a 6390RDS-6832, and don't have any issues, though looking at it's marked for the G34/35. There's some minor vertical movement but the pistol is secure, some minor fiddling occasionally when holstering. I'm thinking you need one for a G34/35.

ETA: Googled the part number and saw it's a G34 holster. Do you have a light on the pistol? If you don't it's going to flop around in the holster. It won't come out, but it's going to move around.

The DO model won't work with an RMR without modification around the optic hood. That model is made to fit the Docter optic MRDS. To fix that issue you need the RDS model.

After that, you're on the right track with a G34 model, but it isn't exactly the same length with your comp, so you have to either use a full size light to take up the slack or play around with possibly aftermarket barrel plugs in the holster to get a good fit.

6390RDS is the model you seek.

I have a threaded barrel on my Gen5 19. I tried that with my Safariland Holster, but it still didn't fit. I like their holsters, I wish they made them compatible with threaded barrels.