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Sidearms & Scatterguns What’s required to mount a SRO?

BurtG

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  • Nov 9, 2022
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    Looking to put one on a ZEV dragonfly slide.

    Does the sro not come with screws or the sealing plate or anything else needed to mount it ? What do I need. I see all thar stuff listed separate.

    Thanks
     
    Wtf this is what I was afraid of. Ordered screws with the sro shield. Too big for slide threads.


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    Wtf this is what I was afraid of. Ordered screws with the sro shield. Too big for slide threads.


    View attachment 8077589

    If thats the Jagerwerks BROS, give them a call. I think they stock a few different screw types for different cuts.

    What came with the pistol and what optic is it cut for? That doesn't look like a ZEV RMR cut as it doesn't have the front bosses on the cut.
     

    So it looks like Zev, instead of using bosses, run those posts and It keeps the force off the screw itself, but in doing so, require smaller diameter screws.

    My BROS fits right into mine, but my optic cut uses the larger diameter screws and is direct milled with the bosses up front.

    I would call Jagerwerks. I have a collection of optic screws in my shooting bag for all situations.
     
    Looking to put one on a ZEV dragonfly slide.

    Does the sro not come with screws or the sealing plate or anything else needed to mount it ? What do I need. I see all thar stuff listed separate.

    Thanks

    The SRO doesn't need a sealing plate, it's completely sealed/closed on the bottom. The sealing plate is for the RMR and only needed if the mounting surface is narrower than the o-ring on the bottom of the RMR.

    RMRs and SROs mount with #6-32 screws. The two small holes on the front of the underside of the optics are supposed to mate with recoil bosses on the base, or mounting plate, or machined into the slide.

    You bought a slide with a dumb mounting system which uses the optic's screw holes as locators for recoil bosses and now you need to buy undersized screws. CHPWS uses the same idea (dumb) and their optic plates need #4-40 screws. I bet yours does too.

    Measure to make sure the length of screw you buy isn't long enough to bottom out on the extractor rod.
     
    Idk if dumb or not. With that design the screw only holds it down. Not back and forth

    View attachment 8078099View attachment 8078100

    The recoil bosses on the front of the top picture take the axial loads. The screws only see tension loads. That's how Trijicon designed the mounting interface to work.

    Others think they are clever when they do something different which is non-standard and not any better.

    I'm not saying the ZEV slide isn't going to work or that joint's gonna fail. I'm saying it does nothing better than the Trijicon standard while introducing its own problems of non-standard hardware as you just found out.

    This is not my first rodeo with pistol mounted optics or with stress/strain/screw joints.
     
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    Looks like you’re on the way to figuring it out OP. My gunsmith mills the slide so the RMR fits the pocket tight. It almost clicks into place. There are different ways if doing it and some of those ways work well.
     
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