Ade Advanced Optics Optics Delrin Shims 1.0 Degree for Vortex Venom & Viper, ADE RD3-006, RD3-009, RD3-012, RD3-013, RD3-015,Crimson Trace CTS -1250, Insight , Docter, Meopta, Sightmark, Burris Fastfire II, III,Red dot Sight

Had a Glock 17 G4, using a Vortex Venon. Was still shooting 5 inches low from point of aim after maxing up the UP adjustment. Mounted and recounted a couple of times, no improvement. Purchased the plate, and problem solved. I see reviews about it not fitting, the ad states it may need to be trimmed. Mine was probably a 64th too long on the MOS plate. I used a drill bit that fit snuggly in the existing hole and gently elongated them with just a few twists of the bit by hand, less than 5 minutes of effort. Recovered at least half of my elevation adjustment. Only about 150 rounds in since install, but so far no issues and zero is held.

OK, I read all the reviews on this item. The one that stands out is the one where the buyer used a drill bit to enlarge the holes. My shim did not line up correctly so I used his method. You must have patience and take your time in doing this. Once I put everything together, I needed to get longer screws so I ordered them from a Seller on eBay. They are #6-48 x 9/16. This worked perfectly. I will be shooting this weekend to see how it holds up. I put the Burris Fastfire III on my Kimber Ultra Carry Pro II.

Was having a problem getting the vertical adjustment zeroed in on my Vortex Venom. This shim fixed the problem.

Was having a problem getting the vertical adjustment zeroed in on my Vortex Venom. This shim fixed the problem.

I've been shooting in Carry Optic division for some time, and sent the slide of my competition pistol to be milled for my red dot sight. The milling and refinishing was perfect, and the sight mounted down in the slide was better than before, mounted on a rear-sight dovetail plate. Almost perfect. When re-zeroing the sight, it ran out of vertical adjustment just *barely* before it was exactly right. (Not the fault of the machining.) Deciding I needed to install a shim to get things just right, I chose get an Ade Advanced Optics shim (make absolutely certain that you're getting the right shim for your RDS), installed it in a couple minutes, needing no tools other than the driver bit for installing the sight's screws (use thread locker). The sight is visually perfect in its milled slot, completely solid, not showing any shim at all, short of using a magnifier. The result on re-zeroing is that the vertical adjustment is near the middle of its range, and life is good. Now, if this 70+ year old continues to practice and improve, all will be well.

I have many firearms with red dots, including a number of Vortex Venoms. I sent my Glock 21 slide to be milled for another Vortex Venom. When it arrived back to me, the fitment onto the slide seemed very precise. However, I could not lower the elevation to closer than about 55 MOA from POA / POI. I was trying to imagine how I could resolve this without either sending my slide back for re-milling and waiting another 4-6 weeks, or should I remove one of my other well-zeroed Venoms from its host to check the incline of the milling on my slide. I racked my brain to figure out how I could securely shim the Venom on my G21. That's when I, on a whim< entered "venom Red Dot Shim" into Amazon's search. VOILA! This product popped up. I just mounted it to check, then blue Loctited it. It is now perfectly zeroed. Granted, my elevation adjustment is maxed out, but it IS perfectly zeroed. I will know in a month or so if it holds that adjustment, but I see no overt reason why it will not! HIGHLY recommend!

I purchased one of the FNX-45 tactical models that came with the Vortex Venom as a package deal. No matter what I did, I could not get the red dot even close to Zero. I maxed out my "UP" adjustment and was still consistently 7 inches low of my target. Not knowing exactly what was wrong, I watched a video suggesting one of these shims as a solution instead of having my slide milled some more. Well, purchased one shim, and it fit perfectly, installed easily, and I was able to reduce my "UP" adjustment way down, and still have much room for fine tuning either direction now. If you have this same red dot problem with your FNX-45, this is the most practical solution instead of getting more milling on your slide. Not sure why FN doesn't include one of these shims with all of their guns with a red dot mount cut-out. I see I am not the first person who has had this problem with one of their guns.

If you have an optic that has maxed out it's elevation this is a perfect solution to allow you to zero out your optic.

So I originally bought the Venom for my Mossberg 590, since it came with a Picatinny/side saddle attachment but unfortunately the sight did not adjust enough, and shot placement was low, even at max settings. This shim fit perfectly on the mount that came with the optic, no modifications needed, and functioned exactly as described. I haven’t had a chance to take it out yet, but it does fit well, and appears to line the sight window up slightly better than without it. Will see in a week when I have a chance to take it out. But for a stock vortex venom, it fits.

After a few weeks of researching shims I decided on this one. I was pleasantly surprised with how it bolted on my pistol. Everything lined up perfectly and I am well pleased with the product.

It was what I needed to add some elevation to my red dot. Good price.

I added this to my Ruger-57 with a Vortex Venom red dot. I immediately fixed the problem with not being able to adjust the dot far enough down.