Sig P320 X-Five Legion with Holosun 507K Optic Mount

9mmGunGuy

9mmGunGuy

CGN Ultra frequent flyer
Rating - 100%
43   0   0
Location
S. Ontario
I'm mounting a Holosun 507K Optic on a Sig P320 X-Five Legion and it looks like I'm missing an optic sealing plate (see below).
Anyone know where I can get this? They are in stock at Sig but they don't ship to Canada.
Note: The optic mounts directly to the slide even without this plate but the original adjustable rear sight screw holes are exposed.

Screen Shot 2022-12-04 at 7.37.15 AM.jpg
 

Attachments

  • Screen Shot 2022-12-04 at 7.37.15 AM.jpg
    Screen Shot 2022-12-04 at 7.37.15 AM.jpg
    24.1 KB · Views: 2,663
I don't believe you need that for the Holosun because the battery loads from the side. You just need the right adaptor plate.
 
You still need a filler plate to mount the holosun/rmr. Or you'll be wearing the red dot in your face after a few rounds when your screws shear off from the force.
 
Hmm not aware of a sealing plate ? As stated ^^possibly for waterproofing ?
I went with The Outer Impact mounting plate using a Romeo 3max picked up from DoubleTap sports.
There are a few different footprints it will accommodate. So most likely Holosun would fit? Lost instruction sheet oops.
Also part of Plate mounts into the forward pocket in the slide so it’s quite secure.

Now looking at the Holosun upcoming Red Dot is the SCS .
It will be No battery. Using solar and a capacitor to operate.
Also they will be gun specific to model. So=no mounting plate will be used just direct mount.
Not holding my breath but looking forward.
Interested to learn more please update once completed!
View attachment 637300
 
Spuhalsky said:
https://shop.blackboxcustoms.com/pr...508t-filler-plate?_pos=8&_sid=4e85d2f2e&_ss=r
Click to expand...

Yes, this might work but I managed to find the sealing plate for around $30 at IRG US site. (see link below)
Note the notched section that covers the rear sight's screw holes. The other plates discussed here don't do that.

Here's the area that I need covered.

M17_CUT-1003_Black__84736.jpg

Here's the rear adjustable sight that was removed.

8900720-web-1.jpg

See https://www.irunguns.com/product/sig-p320-trijicon-rmr-adapter-plate
 

Attachments

  • M17_CUT-1003_Black__84736.jpg
    M17_CUT-1003_Black__84736.jpg
    13.4 KB · Views: 389
  • 8900720-web-1.jpg
    8900720-web-1.jpg
    18.9 KB · Views: 384
Last edited:
Ahh I see the purpose it plugs the holes yes, water proofing na.
but mainly provides the extra mounting points and fills the slight gap/also has the front beaver tail tab.
Sweet!
Nice I learned something today;-)
Now wondering how the Delta Point Pro directly mount works?
 
Rippo said:
Ahh I see the purpose it plugs the holes yes, water proofing na.
but mainly provides the extra mounting points and fills the slight gap/also has the front beaver tail tab.
Sweet!
Nice I learned something today;-)
Now wondering how the Delta Point Pro directly mount works?
Click to expand...

I have a DPP directly mounted to the slide. It covers the whole optic cut-out. No need to sealing or filler plates. Same goes for the Romeo 1 pro.

Direct mount optics have the advantage of sitting lower on the slide.
 
9mmGunGuy said:
Yes, this might work but I managed to find the sealing plate for around $30 at IRG US site. (see link below)
Note the notched section that covers the rear sight's screw holes. The other plates discussed here don't do that.

Here's the area that I need covered.

View attachment 637318

Here's the rear adjustable sight that was removed.

View attachment 637319

See https://www.irunguns.com/product/sig-p320-trijicon-rmr-adapter-plate
Click to expand...

You are missing the point. The sealing plate is only meant to seal the RMR battery compartment, it is the same exact size as the RMR and will not cover the rest of the cutout. The footprint of the RMR/SRO/Holosun optic is smaller than the cutout on the X5. The reciprocating force will be felt on the screws only and they will shear off in a short amount of time. The filler plate is meant to give the optic a bit of metal to sit against to distribute the force away from the screws.
 
Yes the sealer plate is only for the RMR because it is a bottom load battery. You just need the right adapter plate. Pretty sure this C&H would work on the x-five even though it is specifically for the RX/AXG.

IMG_7575-2-1-1024x1024.jpg
 
Rippo said:
Now looking at the Holosun upcoming Red Dot is the SCS .
It will be No battery. Using solar and a capacitor to operate.
Also they will be gun specific to model. So=no mounting plate will be used just direct mount.
Click to expand...

I just got one for a Glock and it is a really nice set up - Green dot, compact and sits low so stock sights will cowitness.
 
Just finished mounting the 507C. 507K is going elsewhere. Thanks for the advice everyone.

Gun Stuff - 1 of 1.jpg
 

Attachments

  • Gun Stuff - 1 of 1.jpg
    Gun Stuff - 1 of 1.jpg
    55.9 KB · Views: 551
gdawg said:
I just got one for a Glock and it is a really nice set up - Green dot, compact and sits low so stock sights will cowitness.
Click to expand...
Nice! Where did ya get the SCS and $?
Hope they do a x5 soon.

That 507c is a smooth direct fit on your Legion!
Did ya use the plate or not?
Think I’m missed a step here.
 
You must log in or register to reply here.
Back
Top Bottom