Tag: closed emitter

Categories
1911 2011 Fusion Firearms Optic XP Pro

So, I was bored and did this —

I’ve a Viridian RFX45 that I bought a few years ago. I’d tried to fit it to the XP Pro back then but there were issues. To install it, I’ve to stack a plate upon a plate. Luckily, the irons will still co-witnesses through the glass (only just — I can even see the dot on the front iron sight). Oh, and I had a devil of a time finding screws to secure the Acro plate to the Fusion plate.

This particular optic is a closed emitter unit. I haven’t been using it, and it’s better than not using an optic, in my opinion. I do like the 407C’s view port size better, though.

UPDATE (10/19/2026): I went to the range yesterday evening and shot just under 100 rounds through the XP Pro. The Acro plate came loose twice (yeah, it had blue threadlocker applied to it 24 hrs before), so I stopped shooting it. I’ll try Vibratite next – hoping that works, but if not, I’ll look into getting some different screws to secure it (the screws are very small and have very little threading – I’d actually anticipated that they would loosen). Better yet, I may just purchase another optic. The RFX45 did extremely well, though, which is a pity that the plate won’t stay secured to the Fusion Firearms RMR plate.

UPDATE (10/24/2026): Instead of continuing to attempt to make this optic work with the Fusion Firearms 2011s, I decided to just get a Holosun. I was thinking on getting another Cyelee Chameleon but those are a bit more than I’m willing to pay (they are $199). Now, I’ve not tried to fit a Holosun to this, but I’m thinking it’ll work better than trying to fit the Viridian. As well, the Holosun I bought is the 407C (I already have one of them on my carry gun). I bought one earlier in the year, at The Gunshop USA for around $160 (before shipping). I checked to see if they still had them at the same price and they did, so I bought another one a few minutes ago. The link for the 407C is here – you’ve to ask for a price via email and they send it to you within five minutes of asking. The total price with shipping is $188, which still undercuts the Cyelee Chameleon price.

UPDATE (10/30/2026): So, I removed the RFX45, then redid the threads with another type of blue threadlocker instead of the cheap threadlocker that I initially used. I let it cure for 3-4 days, and also ensure the screws were tightened using an inch-lb torque wrench. I also used threadlocker on the side-screw of the optic. I then took it to the range yesterday and shot a box of ammo through it. The adapter plate and optic did not move. I believe I’ve solved the issue. HAH! Now I’ve a 407C that will sit in a box for a while as a hot spare. Yes, I could remove the RFX45 and swap in the 407C, but why remove the RFX45 when it’s now solidly mounted? If/when the optic loosens, I’ll switch out the optic.

Categories
1911 2011 Optic range visit Tisas

My Thoughts on Using my First Closed-Emitter Optic

I visited the range yesterday, with the Tisas DS9 Carry. The plan was to zero the Viridian RFX45.

I spent maybe 40 minutes zeroing the optic – because Viridian’s instructions were backwards. Once I had the optic zeroed, I began to shoot to test out the optic…during the testing (all 10 min of it), the optic screws started backing out. I wasn’t initially aware, and I’d been tweaking the zero, so the optic’s current zero may be out of whack. I’ll address that at the next range visit.

The slide was hot, and because I was giving the gun the beans, I’m thinking the heat loosened the thread locker, and since the screws are so short, there wasn’t much thread locker on the screws.

I ordered more screws maybe 2-3 days ago (I stated that in my last post). They’ll arrive on 3/10. These are the M3-0.5 x 6mm screws. The gun is currently using a pair of M3-0.5 x 3.4 mm that were included with the optic. I’m now doubting that the 6mm screws will be long enough, so I ordered another set from eBay (8mm)…they should be here within 4 days.

I do have some longer screws that I might be able to cut down with a dremel…they’re too long – I tried using them and they bottom out before they start securing the optic.

Other than all that, the optic is great! Some observations:

  • The optic’s front glass got dirty quickly, much more quickly than my other optics, but none are as close to the ejection port as that optic/gun combo.
  • Brass was pinging off the optic’s frame, on it’s right side. I sort of expected this, as the prior optic I used on this gun (Cyelee CAT) was also catching brass.
  • The glass offers a much wider field of view than I’m used to, which is good.
  • I’m able to shoot the gun quickly with the optic, while still being accurate (at 10 yards, too).
  • As mentioned earlier, the zeroing instructions that Viridian supplied had me moving the damned POI to the edge of the paper target, which was frustrating.
  • Would love for this optic to have a two reticle system, as my Holosun ACSS Vulcan does…I may be spoiled by that double reticle system, as I was struggling to find the dot whenever I was trying to look down the sight.
  • Cowitness of the irons look to be a bit less than 1/3rd, but is still more usable than when trying to use the integrated iron on the Holosun 507K with my Ultralight.
  • Due to it being a closed emitter optic, it’s super easy to clean off the carbon and fingerprints.
  • The Acro footprint is pretty badass. The two screws that hold the adapter in place will loosen well before the one screw that holds the optic onto the adapter.
  • One thing I don’t like about this optic is that it’s so big that I’ve to grab it behind the optic when racking, which is a PITA. I do not like racking a gun by grabbing it’s optic and I refuse to do it. Luckily, this is a setup I don’t plan to carry.

Based on my observations, I just might try to pick up an RFX44…it’ll sit better on an RMSc-cut slide than an RFX45 would on an RMSc-cut slide, for sure.

I love the RFX45 because I’m getting a lot of bang for the buck…the optic wasn’t super expensive because I found it for a good price (much lower than MSRP), but I’m getting a lot from it. Because it has all it’s innards up top within the optic, it sits low on the gun, which helps with cowitness.

I may try to visit the range again this coming Wednesday (my work day – I work not far from my range, so it may be easy for me to visit after work). If not, I’m also off on Friday (my birthday is Saturday). I think I’ll try to schedule Wednesday AND Friday.

Categories
1911 2011 Optic range visit Tisas

I Mounted The Viridian RFX45 To The Tisas DS Carry!

A few weeks ago, I bought a Viridian RFX45, knowing it’s mainly an optic that won’t fit RMSc-cut guns. I bought the optic for use with a few duty-sized guns that I’ll be purchasing…those guns are cut for RMR sights.

I then wondered if this particular optic will fit a Tisas DS Carry (I’ve the Gen 1 version). They are cut for RMSc (the new gens might allow for RMR, though). Looking at the RFX45, it’s quite a bit longer than a typical RMSc optic, so I doubted I could fit the RFX45 to it. This is also why the RFX44 exists, as it is a mailbox-type of optic that fits guns that are cut for RMSc. I didn’t want to buy the RFX44 because it’s specs are inferior to the RFX45.

So, I decided to see if I could get it to fit, knowing I might be unsuccessful.

I bought an RMSc-to-Acro adapter plate and it arrived today.

I removed the Cyelee CAT from the Tisas DS Carry and test-fit the adapter plate to the gun…it fit right onto the gun without issue.

I then wanted to see how the RFX45 would mount to the adapter plate. It fit onth the plate without issue.

The biggest problem for me was finding screws. I had to use M3-0.5 x 3.4mm, as those were the only screws I had that would fit. I’d other longer M3 screws but they were too long and wouldn’t even put tension on the plate. The M3-0.5 x 3.4mm screws are super-short but they had thread locker and I had enough length to secure the optic. I also decided right then to buy some M3-0.5 x 6 mm (I believe 6mm will fit). They’re on the way to me now.

So, with the short M3 screws, the adapter plate was able to be properly mounted to the gun’s slide. From there, all I had to do was clamp on the optic (I love the Acro pattern).

The adapter plate lifts the optic so that it sits above the milling, otherwise the optic wouldn’t be able to fit in the smaller footprint. I also still have cowitness of my irons.

Note that the RFX45 is a closed emitter optic. It has a large viewing port. It’s also a green dot (all Viridian optics are green).

I absolutely can’t wait to test this setup at the range. I’ve a scheduled range visit tomorrow evening.

Some pics are below. Yeah, the gun is dirty – I use my guns.