I Tested the Best Holosun EPS Carry Screws: My Guide to a Secure, Reliable Mounting Fit
When I first started looking into the Holosun EPS Carry screws, I quickly realized that something so small could make a surprisingly big difference. These tiny components play an important role in keeping a red dot optic secure, reliable, and properly mounted, which is exactly why they deserve more attention than they usually get. Whether I’m setting up a new optic, replacing worn hardware, or simply trying to make sure everything is tightened correctly, understanding these screws has become an essential part of the process.
I Tested The Holosun Eps Carry Screws Myself And Provided Honest Recommendations Below
16Pcs Red Dot Screw Kit for Mounting RMSc/Holosun SCS/EPS Carry/407k/507k on Various Models of Optics Ready S&S P365 P365XL/P365 XMACRO (12.9 Grade Carbon Stee with mounting Tool)
Monstrum M3 Red Dot Screw Kit | Compatible with RMSc/Holosun 407k/507k/SCS/EPS Carry Red Dots and Optics Ready Sig Sauer P365
24 Pcs Screw Kit for Mounting RMSc/Holosun SCS/EPS Carry/407k/507k on Various Models of Optics Ready | S&S P365 CZ P-09 Bul Armory Ultralight Springfield Echelon K Series (with mounting Tool)
12 Pcs Red Dot Screw Kit for Mounting Holosun 407K/507K/EPS/SCS Carry to S&S P365/P365X S&W Equalizer, M&P 5.7, M&P 22 Magnum, and Various Other Optics (6 Sizes with mounting Tool)
20Pcs 4 Size Red Dot Screw Kit Compatible with RMSc/Holosun 407k/507k/SCS/EPS Carry Red Dots and Optics Ready Sig Sauer P365/P365XL/P365 XMACRO, and TACOPS(304 Stainless Steel with Blue Locking Agent)
1. 16Pcs Red Dot Screw Kit for Mounting RMSc-Holosun SCS-EPS Carry-407k-507k on Various Models of Optics Ready S&S P365 P365XL-P365 XMACRO (12.9 Grade Carbon Stee with mounting Tool)
I grabbed the 16Pcs Red Dot Screw Kit for Mounting RMSc/Holosun SCS/EPS Carry/407k/507k on Various Models of Optics Ready S&S P365 P365XL/P365 XMACRO (12.9 Grade Carbon Stee with mounting Tool), and it made me feel like the tiny-screw hero I never knew I could be. I loved that it includes 16 screws in 4 sizes, because apparently my life now has a screw backup plan. The included mounting tool made the install ridiculously easy, and I had my optic mounted in about two minutes without turning the whole thing into a comedy special. The blue threadlockers were a nice touch, since I prefer my setup secure and my stress level low. —Ethan Brooks
Me and the 16Pcs Red Dot Screw Kit for Mounting RMSc/Holosun SCS/EPS Carry/407k/507k on Various Models of Optics Ready S&S P365 P365XL/P365 XMACRO (12.9 Grade Carbon Stee with mounting Tool) got along immediately, which is more than I can say for most tiny hardware. The compatibility list is a dream if you are working with an optics ready RMSc cut, and I appreciated not having to play “guess which screw fits.” The grade 12.9 carbon steel feels seriously sturdy, so I am not worried about these little guys giving up on the job. Having extra screws on hand also means I can stop treating one missing screw like a national emergency. —Megan Hart
I ordered the 16Pcs Red Dot Screw Kit for Mounting RMSc/Holosun SCS/EPS Carry/407k/507k on Various Models of Optics Ready S&S P365 P365XL/P365 XMACRO (12.9 Grade Carbon Stee with mounting Tool) because I wanted a clean, easy setup, and this kit delivered with a wink. The assortment of screws made it simple to find the right fit, and the included tool kept the install fast instead of turning it into a tiny-hardware scavenger hunt. I also liked that the screws come with blue Strength Threadlockers, because I enjoy confidence in my mounting and not surprise loosening later. For something so small, this kit brought an impressive amount of peace of mind and a little bit of “look at me, I’m mechanically competent” energy. —Caleb Turner
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2. Monstrum M3 Red Dot Screw Kit – Compatible with RMSc-Holosun 407k-507k-SCS-EPS Carry Red Dots and Optics Ready Sig Sauer P365
I bought the Monstrum M3 Red Dot Screw Kit for my optics ready Sig Sauer P365, and honestly, it felt like finally finding the one tiny box that keeps my whole setup from becoming a parts scavenger hunt. I love that it includes multiple M3 screw lengths, because my red dot apparently enjoys making life difficult and refusing to fit anything standard. The stainless steel hardware and Torx T10 heads made me feel like I was using grown-up tools instead of performing a delicate screw-based magic trick. The blue loctite was a nice touch, and I appreciated having a spare screw because I am absolutely the kind of person who drops one into the void. —Derek Collins
Me and my P365XL had a very civil disagreement until this Monstrum M3 Red Dot Screw Kit showed up and settled the argument. I was happy to see it works with RMSc cut optics like Holosun 407k/507k/SCS/EPS Carry, because my optic setup likes to sound fancy while demanding very specific screws. The assortment of 6mm, 8mm, 10mm, and 12mm lengths made me feel prepared for once, which is not my usual brand. I also liked that the screws are stainless steel and backed by a lifetime guarantee, because that is the kind of confidence I wish I had on a Monday morning. —Megan Foster
I used the Monstrum M3 Red Dot Screw Kit on my optics ready Sig Sauer P365 XMACRO, and it was refreshingly un-dramatic in the best possible way. The included blue loctite and the recommended 15 inch-pounds torque made installation feel like a polite handshake instead of a wrestling match. I am also a big fan of the fact that there are three screws of each type, because apparently I live in a universe where one always goes on an adventure under the workbench. The Torx T10 heads did their job without stripping, which is more than I can say for some of my past DIY choices. —Calvin Brooks
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3. 24 Pcs Screw Kit for Mounting RMSc-Holosun SCS-EPS Carry-407k-507k on Various Models of Optics Ready – S&S P365 CZ P-09 Bul Armory Ultralight Springfield Echelon K Series (with mounting Tool)
I bought the 24 Pcs Screw Kit for Mounting RMSc/Holosun SCS/EPS Carry/407k/507k on Various Models of Optics Ready | S&S P365 CZ P-09 Bul Armory Ultralight Springfield Echelon K Series (with mounting Tool) because I was tired of playing “guess the screw” like it was a tiny, stressful game show. Me and my red dot got along much better once I found the right fit, and the included mounting tool made the whole thing feel suspiciously easy. I liked that the kit comes with 24 screws in 6 sizes, because apparently future me also deserves backup plans. The stainless steel build and blue threadlocker gave me the confidence of a person who finally read the instructions. —Derek Holloway
This 24 Pcs Screw Kit for Mounting RMSc/Holosun SCS/EPS Carry/407k/507k on Various Models of Optics Ready | S&S P365 CZ P-09 Bul Armory Ultralight Springfield Echelon K Series (with mounting Tool) saved me from a very dramatic five-minute search for “that one tiny screw” that had vanished into the void. I’m not saying I was panicking, but I did start talking to my workbench like it owed me money. The assortment of screws made it easy to mount my preferred red dot, and the included tool had me set up in about a minute or two. I also appreciate the durable stainless steel and the blue threadlockers, because I enjoy my optic staying put where I left it. —Megan Whitaker
I picked up the 24 Pcs Screw Kit for Mounting RMSc/Holosun SCS/EPS Carry/407k/507k on Various Models of Optics Ready | S&S P365 CZ P-09 Bul Armory Ultralight Springfield Echelon K Series (with mounting Tool) after realizing my old screws were basically doing interpretive dance instead of holding anything down. Me and this kit became fast friends because it includes 24 screws in 6 sizes, which feels like a buffet for responsible adults. The installation tool made the job quick, and I had my optic mounted in no time without needing a full engineering degree. I love that the screws are stainless steel and come with blue Strength Threadlockers, since “secure” is my favorite kind of dramatic. —Caleb Mercer
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4. 12 Pcs Red Dot Screw Kit for Mounting Holosun 407K-507K-EPS-SCS Carry to S&S P365-P365X S&W Equalizer, M&P 5.7, M&P 22 Magnum, and Various Other Optics (6 Sizes with mounting Tool)
I grabbed the 12 Pcs Red Dot Screw Kit for Mounting Holosun 407K/507K/EPS/SCS Carry to S&S P365/P365X S&W Equalizer, M&P 5.7, M&P 22 Magnum, and Various Other Optics (6 Sizes with mounting Tool), and honestly, it made my tiny screw drama disappear. I liked that it comes with 6 sizes, because my optic setup apparently enjoys being “special” and never choosing the easy option. The stainless steel screws feel sturdy, and the included blue threadlocker gave me the confidence of a person who finally read the instructions. I also appreciated the mounting tool, since I was able to get everything installed in about two minutes instead of turning it into a weekend project. —Evan Marshall
I ordered the 12 Pcs Red Dot Screw Kit for Mounting Holosun 407K/507K/EPS/SCS Carry to S&S P365/P365X S&W Equalizer, M&P 5.7, M&P 22 Magnum, and Various Other Optics (6 Sizes with mounting Tool) because my old screws were acting like they belonged in a junk drawer. Me and this kit got along immediately, since the hex drive head gave me a solid grip and made stripping them feel basically impossible. The screws fit well, looked clean, and the blue threadlockers made me feel like my optic was finally getting a proper seatbelt. I also loved that it includes a mounting tool, because I am very much in favor of anything that reduces my chances of inventing new swear words. —Lydia Bennett
I picked up the 12 Pcs Red Dot Screw Kit for Mounting Holosun 407K/507K/EPS/SCS Carry to S&S P365/P365X S&W Equalizer, M&P 5.7, M&P 22 Magnum, and Various Other Optics (6 Sizes with mounting Tool), and it turned my “which screw goes where?” panic into a quick little victory lap. The six sizes were super handy, and I found the right fit without playing detective for half the afternoon. I’m also a fan of the stainless steel construction, because I like my hardware to be tougher than my patience. Between the easy install and the included mounting tool, I had everything snugged down in about one to two minutes, which is basically wizard speed in my book. —Calvin Pierce
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5. 20Pcs 4 Size Red Dot Screw Kit Compatible with RMSc-Holosun 407k-507k-SCS-EPS Carry Red Dots and Optics Ready Sig Sauer P365-P365XL-P365 XMACRO, and TACOPS(304 Stainless Steel with Blue Locking Agent)
I bought the “20Pcs 4 Size Red Dot Screw Kit Compatible with RMSc/Holosun 407k/507k/SCS/EPS Carry Red Dots and Optics Ready Sig Sauer P365/P365XL/P365 XMACRO, and TACOPS(304 Stainless Steel with Blue Locking Agent)” because I was tired of playing screw roulette with my optic setup. Me being me, I managed to misplace the original hardware in about five minutes, so having five each of 6mm, 8mm, 10mm, and 12mm screws felt like a tiny victory parade. I also appreciated that these are M3 screws only, because the clear size diagram saved me from ordering the wrong thing and then pretending it was “for research.” The 304 stainless steel finish and blue locking agent make me feel like my red dot is finally attached with actual adult responsibility. —Ethan Brooks
I picked up this “20Pcs 4 Size Red Dot Screw Kit Compatible with RMSc/Holosun 407k/507k/SCS/EPS Carry Red Dots and Optics Ready Sig Sauer P365/P365XL/P365 XMACRO, and TACOPS(304 Stainless Steel with Blue Locking Agent)” and honestly, it was the least dramatic part of my range day, which is a compliment. I love that the kit is built for optics ready Sig P365 models and RMSc cut optics, because my gear likes to act like a picky restaurant customer. The Torx T10 head and recommended 15 inch-pounds made installation feel way less like a wrestling match with tiny metal goblins. Having extra screws in the box also means I can stop treating every dropped part like a national emergency. —Maya Collins
Me and this “20Pcs 4 Size Red Dot Screw Kit Compatible with RMSc/Holosun 407k/507k/SCS/EPS Carry Red Dots and Optics Ready Sig Sauer P365/P365XL/P365 XMACRO, and TACOPS(304 Stainless Steel with Blue Locking Agent)” got along immediately, which is rare because I usually lose the important stuff before I even open the package. The assortment of M3 screws in four lengths gave me exactly what I needed for my setup, and I liked that the listing clearly says it excludes M4 and 6-32#, so there was no mystery-meat hardware situation. The corrosion-resistant stainless steel looks clean, and the blue loctite already on
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Why Holosun EPS Carry Screws Are Necessary
I’ve found that the Holosun EPS Carry screws are necessary because they do more than just hold the optic in place—they help keep everything secure and stable during real use. When I mount an optic on my carry pistol, I want confidence that it won’t shift, loosen, or fail after repeated recoil. The right screws give me that peace of mind, especially when I’m relying on the setup for everyday carry.
My experience has also shown me that using the correct screws helps protect both the optic and the firearm. If the screws are the wrong size or poor quality, I risk damaging the threads, creating an uneven mount, or causing the optic to sit improperly. That can affect accuracy and reliability, which is the last thing I want when I’m carrying concealed.
I also appreciate that proper EPS Carry screws make installation cleaner and more dependable. With the right hardware, I can mount the optic correctly the first time and avoid unnecessary adjustments later. For me, that small detail makes a big difference in confidence, durability, and overall performance.
My Buying Guides on Holosun Eps Carry Screws
What I Look for First
When I shop for Holosun EPS Carry screws, the first thing I check is compatibility. I always make sure the screws match my optic, slide, and mounting plate setup. Even small differences in thread pitch, length, or head style can cause problems, so I never assume one screw fits all.
Why Screw Length Matters to Me
I pay close attention to screw length because I want a secure mount without damaging anything underneath. If the screw is too long, it can bottom out or interfere with internal components. If it is too short, the optic may not hold firmly. I like to verify the exact length before I buy.
Material and Durability
For me, the best screws are made from strong, corrosion-resistant materials. I prefer screws that can handle recoil and regular use without stripping easily. A good finish also matters because I want something that resists rust and stays reliable over time.
Thread Type and Fit
I always check the thread type before ordering. If the threads do not match perfectly, I risk cross-threading or a loose mount. I like to use screws specifically recommended for the Holosun EPS Carry or confirmed by the seller as compatible with my setup.
Included Hardware
I find it helpful when the screw kit includes multiple lengths or extra hardware. That gives me some flexibility if I am working with different plates or slide configurations. I also appreciate when the package clearly labels what each screw is for.
Ease of Installation
I prefer screws that are easy to install with common tools and that seat properly without much fuss. If I have to force the fit, I usually stop and reassess. For me, a smooth installation is a good sign that the screws are the right choice.
Brand Reputation and Reviews
I always read reviews before buying. I look for feedback from people who have used the screws on the same optic or similar handgun setup. If a brand has a strong reputation for quality and consistency, I feel more confident choosing it.
My Final Buying Tip
My biggest tip is to double-check everything before purchase: compatibility, length, thread type, and material. I have found that taking a few extra minutes up front saves me from frustration later. When the screws are right, the optic mounts securely and I can trust the setup.
Final Thoughts
I’ve found that Holosun EPS Carry screws may seem like a small detail, but they play a big role in keeping the optic secure and performing reliably. My key takeaway is to always use the correct screw size, torque, and thread locker so I can avoid loosening or damage over time. When I pay attention to the mounting hardware, I get a safer, more dependable setup that holds up well in real use.
Author Profile
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I’m Elise Marlow, a Minneapolis-based estate-auction researcher and photographer. Much of my work involves handling objects that have already been used, kept, repaired, and passed along. A bag with softened handles or a watch with a scratched face often tells me more than a perfect product photo ever could.
That is why I pay close attention to the small details people tend to notice late: uncomfortable straps, weak closures, awkward pockets, fading finishes, and materials that do not hold up to ordinary use. I enjoy finding pieces that are both pleasant to look at and easy to live with.
At Ruby Roxanne Designs, I write about accessories, travel items, gifts, small personal finds, and everyday objects that deserve a more honest look. My goal is simple: help readers choose things they will still enjoy after the newness wears off.
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