The Sig P320 is a mess when mounting optics in our opinion. What do you think? Our guide explains it all easily and more in depth --> freedomgorilla.com/blogs/news/best-sig-p320-holosun-optics-adapter-filler-plates?yt
I wish I would have watched this video when I first mounted my holosun. Damn gun store told me I was good to go, screws included would work, and mount it straight to gun. I stripped 2 sets of screws. Then found I needed the longer screws, then found you. Thank God I did, and I got the adapter plate and the screws, I still haven't gone to shoot it yet since these recent changes. I'm praying everything goes good when I go out in a few days.
Just came across this video and it couldn't have been more timely as I'm strongly considering optics for my P320 XCompact and P365XL. This was very informative and cleared up many questions. When the time comes, I'll be buying through your site. Thanks!
Excellent information as usual! I don’t have the Sig so I’m not concerned with how to mount a Holosun optic on it, I came here to see the latest Holosun optics in general, and you didn’t disappoint. After two years with the 407k on my Ruger Max-9, I’m still just as happy with it as day 1. Of course the 407k and 507k install directly on the Max-9 with no plates or fuss and that’s what I wanted. I chose the 407 over the 507 mostly because of the price difference and it was my first optic ever, so I didn’t want spend the extra money on the 507 in case I didn’t like an optic at all on a pistol. Turns out, I’m hooked on the optic and much prefer it over iron sights, especially due to my 60 year old eyes. While contemplating upgrading to the 507k because of the multi-reticle option and the 2 MOA dot instead of the 6 MOA on the 407, I actually got to try one out on my friend’s pistol. Glad I did. I found the 2 MOA dot tiny and much harder to find at speed and the circle-dot to be more distracting than helpful. And maybe that’s because I can find my 6 MOA dot instantly with two years of practice with it. And, I’m not looking to be more precise and slower at a 50 yard shot with a micro 9 since it’s not made for that. So I’m sticking with the 407K. The cheapest Holosun out there but it’s still way better than the competition that costs more with dumb things like removing the optic to change the battery. Holosun is miles above the competition as far as new innovation and technology as every couple months there’s a new model out while the competition stagnates with the same stuff for years. Saving up for a new full size 9mm for the range and have already decided on an enclosed emitter Holosun for it. Not sure which one yet since by the time I can afford this new pistol, Holosun will most likely have ten more options out there. Lol. Great informative video as always Freedom Gorilla!
Let it be known that I have a SCS 320 and with my 320 Specter Comp the optic will need some form of riser plate. My elevation screw is maxed out and I’m still shooting approximately 2 inches low at 10 yards
I sent a Factory Sig 320 slide to Jager werks to have it cut for a Holosun 402, obviously it worked great. THEN I bought an aftermarket slide with a RMR cut, using the same 402 Holosun, knowing I would need a plate. Looooooooong story short, the adapter plate you showed in the beginning fit the 402 perfect, BUT it did not fit the cut, the cut was too short. About an hour and a half of hand filing the front of the plate and many test fits, I got it to work. After 1K plus rounds of 115g, +P's, and 160g rounds, it holds zero just fine. If I filed the back of the plate, which would have been easier, the holes would not have lined up. Anyone else have a problem with aftermarket slides with optic cuts?
So, let me see if I understand what I hear...I have a brand new Sig P320 M18.....I have purchased a new Holosun SCS 320 optic.......What I hear is that I can install / mount the SCS 320 directly to my new Sig P320 M18 without any adapter and have no gap at the back which could lead to the screws shearing off due to recoil....Am I correct? Thanks for any help....
@rudylozano3974 yes. It'll need a plate though from what I understand it shouldn't or can't be direct mounted without a plate. I'd double check that but I do know for sure you can use a 407c or k with a plate.
So, my brother in law picked up a p320xc with lci flag. we went with the holosun scs optic because he needed green dot to see it best. bolts right on but doesn't fill the back void, so its comes loose and broke a mounting screw off. Which is best cnh adapter for this application, the gunsmith told us we need the dowl locators to lock it in so it won't move.
I just purchased a Sig P320-XTEN COMP manufactured 2024. So I do not need a filler plate correct ? And If I purchase through you the 6-40 screws are included with the SCS-320 ? Thanks in advance !
How can I add the iron sight for backup with the SCS and my M18 P320? Do I lose the backup iron sight option? I have the Holosun EPS Carry for my P365 which has backup sights but the SCS does not.
which one do you recommend the holosun 507cACSS Vulcan Reticle or HOLOSUN Technologies SCS Green Red Dot Sight for SIG P320 or HOLOSUN HS507C-X2 Open Reflex Optical Sight
I too am confused. I just purchased the P320 x5 Legion ms-ca. I am planning to mount the Holosun SCS 320. Plate or no plate If so, Which plate to mount with studs?
Great video, a lot of good information. I’m sure it’s in there but maybe I missed it, will I need an adapter plate for a Holosun 507K install on. Sig P320-M18? Thanks
Question, I just purchased a new 320CA-9-M18-MS-CA - SIG SAUER P320 M18 9MM 3.9" FDE MS SIG NS/DPP 10RD - ( sorry for pasting the exact model just need help ) I am awaiting my 10 day background check period, but I am not sure which holosun I can purchase due to not knowing the plate.. What would you suggest me buying, if money wasn’t the issue.
Just got my scs 320, there’s still a slight gap between the housing and the back of the slide pocket it fits into. Did you notice this at all with one of yours?
![ง้อ (ALRIGHT) - FOURTH [ TEASER ]](http://i.ytimg.com/vi/ya6MBfo-Wvg/mqdefault.jpg)
The Sig P320 is a mess when mounting optics in our opinion. What do you think? Our guide explains it all easily and more in depth --> freedomgorilla.com/blogs/news/best-sig-p320-holosun-optics-adapter-filler-plates?yt
Agreed, my M18 has a DPP footprint.
which is the best Holosun, for my P320 Specter ?
I wish I would have watched this video when I first mounted my holosun. Damn gun store told me I was good to go, screws included would work, and mount it straight to gun. I stripped 2 sets of screws. Then found I needed the longer screws, then found you. Thank God I did, and I got the adapter plate and the screws, I still haven't gone to shoot it yet since these recent changes. I'm praying everything goes good when I go out in a few days.
Man, it was like hearing a story about myself!!!! Hahaha sorry you experienced that.
Just came across this video and it couldn't have been more timely as I'm strongly considering optics for my P320 XCompact and P365XL. This was very informative and cleared up many questions. When the time comes, I'll be buying through your site. Thanks!
Awesome thank you! I’m glad it wes helpful!
Perfect video! Answered my question exactly.
Great video! Great guide! I genuinely appreciated the help you provided. Thank you !
Excellent information as usual! I don’t have the Sig so I’m not concerned with how to mount a Holosun optic on it, I came here to see the latest Holosun optics in general, and you didn’t disappoint.
After two years with the 407k on my Ruger Max-9, I’m still just as happy with it as day 1. Of course the 407k and 507k install directly on the Max-9 with no plates or fuss and that’s what I wanted. I chose the 407 over the 507 mostly because of the price difference and it was my first optic ever, so I didn’t want spend the extra money on the 507 in case I didn’t like an optic at all on a pistol.
Turns out, I’m hooked on the optic and much prefer it over iron sights, especially due to my 60 year old eyes. While contemplating upgrading to the 507k because of the multi-reticle option and the 2 MOA dot instead of the 6 MOA on the 407, I actually got to try one out on my friend’s pistol. Glad I did. I found the 2 MOA dot tiny and much harder to find at speed and the circle-dot to be more distracting than helpful. And maybe that’s because I can find my 6 MOA dot instantly with two years of practice with it. And, I’m not looking to be more precise and slower at a 50 yard shot with a micro 9 since it’s not made for that.
So I’m sticking with the 407K. The cheapest Holosun out there but it’s still way better than the competition that costs more with dumb things like removing the optic to change the battery. Holosun is miles above the competition as far as new innovation and technology as every couple months there’s a new model out while the competition stagnates with the same stuff for years.
Saving up for a new full size 9mm for the range and have already decided on an enclosed emitter Holosun for it. Not sure which one yet since by the time I can afford this new pistol, Holosun will most likely have ten more options out there. Lol.
Great informative video as always Freedom Gorilla!
Let it be known that I have a SCS 320 and with my 320 Specter Comp the optic will need some form of riser plate. My elevation screw is maxed out and I’m still shooting approximately 2 inches low at 10 yards
Great presentation! I have to agree on the filler,that’s a must have!
Thank you!
Also in the new scs 320
very informative video with lots of details. Answered a lot of questions I had. Thanks!
I sent a Factory Sig 320 slide to Jager werks to have it cut for a Holosun 402, obviously it worked great. THEN I bought an aftermarket slide with a RMR cut, using the same 402 Holosun, knowing I would need a plate.
Looooooooong story short, the adapter plate you showed in the beginning fit the 402 perfect, BUT it did not fit the cut, the cut was too short. About an hour and a half of hand filing the front of the plate and many test fits, I got it to work.
After 1K plus rounds of 115g, +P's, and 160g rounds, it holds zero just fine. If I filed the back of the plate, which would have been easier, the holes would not have lined up. Anyone else have a problem with aftermarket slides with optic cuts?
Good on ya recommending adapter plate. Thanks for heads up on 6-40 screws. I’m waiting on a C+H adapter plate for my P320 XCarry Legion.
Heck yea. Glad we could help!
So, let me see if I understand what I hear...I have a brand new Sig P320 M18.....I have purchased a new Holosun SCS 320 optic.......What I hear is that I can install / mount the SCS 320 directly to my new Sig P320 M18 without any adapter and have no gap at the back which could lead to the screws shearing off due to recoil....Am I correct? Thanks for any help....
Yes exactly. Your sit is a DPP footprint and the SCS320 is a DPP footprint. It’s the same as putting a Romeo zero on it
So. I have a sig m18 can i put holosun 407c on my sig
@rudylozano3974 yes. It'll need a plate though from what I understand it shouldn't or can't be direct mounted without a plate. I'd double check that but I do know for sure you can use a 407c or k with a plate.
If it's cut for the optic to fit perfect precisely, a plate doesn't matter. The dot will not move.
Correct and that’s only for the scs320
So, my brother in law picked up a p320xc with lci flag. we went with the holosun scs optic because he needed green dot to see it best. bolts right on but doesn't fill the back void, so its comes loose and broke a mounting screw off. Which is best cnh adapter for this application, the gunsmith told us we need the dowl locators to lock it in so it won't move.
So M18 with 507c x2 is recommended to use the chpws plate as well? Was not expecting to spend $75 for a plate after dropping 330 for the optic.
Yes. It’s sigs fault. You could go with. A new primary arms rs-15 or thr scs 320. Those are both direct mounts
I just purchased a Sig P320-XTEN COMP manufactured 2024. So I do not need a filler plate correct ? And If I purchase through you the 6-40 screws are included with the SCS-320 ? Thanks in advance !
Is this video relevant to the 320-M17? Thnx
Yes it is
How can I add the iron sight for backup with the SCS and my M18 P320? Do I lose the backup iron sight option? I have the Holosun EPS Carry for my P365 which has backup sights but the SCS does not.
Yep pretty much no current options available for that unfortunatet
which one do you recommend the holosun 507cACSS Vulcan Reticle or HOLOSUN Technologies SCS Green Red Dot Sight for SIG P320 or HOLOSUN HS507C-X2 Open Reflex Optical Sight
I love my SCS 320!
As I see maybe using a plate make the sight/slide clamp is more solid...
very informative video
Thank you!
I too am confused. I just purchased the P320 x5 Legion ms-ca. I am planning to mount the Holosun SCS 320. Plate or no plate
If so, Which plate to mount with studs?
Great video, a lot of good information. I’m sure it’s in there but maybe I missed it, will I need an adapter plate for a Holosun 507K install on. Sig P320-M18? Thanks
Yes you will. We have them on our website
Cool thanks, just wish they made it in FDE to match the M18.
Question if I out put the Holosun 507K on my Sig 320-m18 will I be able to keep my rear iron sights?
If you have a P320XF do you need the plate? Do you sell the correct length 640 screws?
I have a new gun just purchased p320 m18 which one would I need ? Thanks for your help 👍
Scs 320
Will I need a plate for the 407CO X2? Or does it directly mount?
My P320X Compact's rear sight is integral with the optic cut cover. Which Holosun fits? FYI: I want a 5-6.5 moa GREEN dot.
We have adapter plates. If you want a 6moa your options are 407K, or eps carry 6 moa or eps full size 6moa
Does the EPS carry come with a plate?
Yes but that won’t help with the p320
Question, I just purchased a new 320CA-9-M18-MS-CA - SIG SAUER P320 M18 9MM 3.9" FDE MS SIG NS/DPP 10RD - ( sorry for pasting the exact model just need help )
I am awaiting my 10 day background check period, but I am not sure which holosun I can purchase due to not knowing the plate..
What would you suggest me buying, if money wasn’t the issue.
I’d recommmend the scs320
But he will lose the iron sight (as a backup).
Its a shame that mostly the sight is not clamped to the pistol using the holes for nuts, they are fixed only with 2 screws..
what plate for my sig P320RXP wanting to use the holoson 507 comp
Do you recommend putting this holosun 320 on a xten comp do you think it will stand up too the 10mm power
They don’t rate it for thst. But yes i think it will be fine and it would be a good choice
How can i get the great pricing?
Just got my scs 320, there’s still a slight gap between the housing and the back of the slide pocket it fits into. Did you notice this at all with one of yours?
Yup same here and I happen to have 4 different Sig P320 slides and they all have the same gap issue. Pretty disappointing tbh
Damn :/
Which is the best and cheapest for p320 x compact?
Issue w these guns is they all require adapter plates except for Scs 320. So adapter plate + 407k or 407c
I ordered a 508t would i an adapter plate and what is the pest hight sights to use
Yes you need an adapter plate or the 508t won’t fit
What plate combo works with the Sig M18 and the Holosun HE507C-GR-X2 (Vulcan)?
We have a guide on our site. You need a chpws filler plate
which one? thought we did not need one@@freedomgorilla1
Holosun is taking out trijicon.
these al fit the 320?? i have an xcompact and nit sure what works on it
Yes but most require the proper adapter plate as i mention in the beginning
Will the Holosun SCS for Sig 320 fit a Sig 229 with the DPP cut?
Yep!
Thank-you. I learn a lot from your videos.
No link for the filler plate??
It’s in the blog post we link to near the top.
will i still need the 6-40 screws for the scs 320?
Nope. They use the m4 screw holes.
On the SCS 320, can you adjust the brightness up and down?
It’s fixed auto brightness. But you can hit the button on the side and it will make it brighter for 30 minutes