Just wondering if anyone has had or may have heard of issues with the screws shearing off sending the unit flying while shooting and leaving the bottom threads of the screw in the slide. Bought mine direct mount for my VP9 Amazon reviews had some 1 stars but would appreciate any and all input before I install it.
Holosun SCS issues with screws?
- Thread starter DaveOHCPC
- Start date
If the screws were over torqued then this can definitely cause a failure withyhe fasteners. Was the sight installed with a torque driver to proper manufacturer specs or were they hand tightened without any measure of knowing the force applied?
I'm not passing blame I am just curious.
Bassbob
Emissary
I bought my VP9SK with the SCS already on it. I haven’t touched it. Probably 800 rounds or more through it. No issues. It’s my favorite Holosun.
Bassbob
Emissary
This. I think the torque specs are 12.
Warrior9(Ret)
Custom
That Sucks! I hope you can get those screws out without damaging the slide.
Last edited:
Lab4Us
Master Class
I had Holosun’s on 4 MOS Glocks and one I had milled (G32.4) for one. I also have a Holoson on my Hellcat OSP. I have never had an issue with any of them. Still have one on my G23.5 as well, only MOS Glock I still have. I also have a Holoson still in the box for my Emissary - because I seem to do pretty good with the irons 
.
Only issue I had out of all of those is that I had to contact Holosun to get the proper length screws to put the optic on the Hellcat, but before I got theirs, I found some elsewhere.
If the person reporting sheared off inserted screws that were too long (because that’s what was in the box), that could likely cause the issue.
Find somewhere you can verify screw length(s) needed to put your model of Holosun on your model of gun. If you torque to specs, you’ll have no issues with those screws.
.Only issue I had out of all of those is that I had to contact Holosun to get the proper length screws to put the optic on the Hellcat, but before I got theirs, I found some elsewhere.
If the person reporting sheared off inserted screws that were too long (because that’s what was in the box), that could likely cause the issue.
Find somewhere you can verify screw length(s) needed to put your model of Holosun on your model of gun. If you torque to specs, you’ll have no issues with those screws.
BassCliff
Professional
Hi,
My limited experience: I have one optics pistol with a Holosun 507. I used C&H parts (plate, screws, mounting kit, etc.) to install. You might try their screws (good hard steel) and mounting/maintenance kit (thread lock, markers, torque driver) and follow instructions. My optic is really solid.
chpws.com
Screw kit example (says 'SCS' in description, check screw sizes):
chpws.com
Thank you for your indulgence,
BassCliff
My limited experience: I have one optics pistol with a Holosun 507. I used C&H parts (plate, screws, mounting kit, etc.) to install. You might try their screws (good hard steel) and mounting/maintenance kit (thread lock, markers, torque driver) and follow instructions. My optic is really solid.
Red Dot Maintenance Kit - C&H Precision
If you are a serious shooter or competitor, or if you want 100% peace of mind that your optics are secure on your firearm, you need this small kit of mounting supplies. The kit comes with the following: Fix It Sticks T-Handle Fix It Sticks 6-20 In lb Variable Torque…
chpws.com
Screw kit example (says 'SCS' in description, check screw sizes):
REPLACEMENT SCREW KIT - HK-EPS - C&H Precision
THE MOST MODULAR, RUGGED, DURABLE, RELIABLE AND MOST WIDELY USED AFTERMARKET OPTICS ADAPTER PLATE. DIRECT MILL YOUR OPTIC CLICK HERE
chpws.com
Thank you for your indulgence,
BassCliff
That is awesome, ordering them now and feel a lot better about the install, thanks for this!Hi,
My limited experience: I have one optics pistol with a Holosun 507. I used C&H parts (plate, screws, mounting kit, etc.) to install. You might try their screws (good hard steel) and mounting/maintenance kit (thread lock, markers, torque driver) and follow instructions. My optic is really solid.
Red Dot Maintenance Kit - C&H Precision
If you are a serious shooter or competitor, or if you want 100% peace of mind that your optics are secure on your firearm, you need this small kit of mounting supplies. The kit comes with the following: Fix It Sticks T-Handle Fix It Sticks 6-20 In lb Variable Torque…
Screw kit example (says 'SCS' in description, check screw sizes):
REPLACEMENT SCREW KIT - HK-EPS - C&H Precision
THE MOST MODULAR, RUGGED, DURABLE, RELIABLE AND MOST WIDELY USED AFTERMARKET OPTICS ADAPTER PLATE. DIRECT MILL YOUR OPTIC CLICK HERE
Thank you for your indulgence,
BassCliff
That I can see happening, lots of people think they’re Marisa Tomei and can torture to exact NASA specs
Warrior9(Ret)
Custom
Thank you. I’ve been looking for a maintenance kit for Red Dot Optics.Hi,
My limited experience: I have one optics pistol with a Holosun 507. I used C&H parts (plate, screws, mounting kit, etc.) to install. You might try their screws (good hard steel) and mounting/maintenance kit (thread lock, markers, torque driver) and follow instructions. My optic is really solid.
Red Dot Maintenance Kit - C&H Precision
If you are a serious shooter or competitor, or if you want 100% peace of mind that your optics are secure on your firearm, you need this small kit of mounting supplies. The kit comes with the following: Fix It Sticks T-Handle Fix It Sticks 6-20 In lb Variable Torque…
Screw kit example (says 'SCS' in description, check screw sizes):
REPLACEMENT SCREW KIT - HK-EPS - C&H Precision
THE MOST MODULAR, RUGGED, DURABLE, RELIABLE AND MOST WIDELY USED AFTERMARKET OPTICS ADAPTER PLATE. DIRECT MILL YOUR OPTIC CLICK HERE
Thank you for your indulgence,
BassCliff
powerboatr
Professional
on my viridain optic
i called them as i was missing a screw and he sent me several little packs with new screws
they are snugged and have a built in bit of thread grabber,
never thought about one leaving the game in mid cycle, that would be an eye opener
i called them as i was missing a screw and he sent me several little packs with new screws
they are snugged and have a built in bit of thread grabber,
never thought about one leaving the game in mid cycle, that would be an eye opener
I am curious how or why you think liquid thread lock affects(?) the torque of a bolt/screw?
The only thing liquid thread lock effects(?) is unscrewing the bolt/screw out (it's purpose in life) and for some "colors" like red and the size of the bolt/screw, heating up the bolt/screw or the piece the bolt/screw is in will be needed to "loosen" the thread lock.
SimonRL
Ronin
This is a well known issue with the SCS, particularly with the V1 PDP. You can buy replacement screws from Battlewerx.com.
Thread locker does affect torque ratings. It acts like a lubricant and you should lower the torque settings by a couple of pounds. Holosun recommends you use blue loctite
Warrior9(Ret)
Custom
Well, after going through my tool cabinet I realized all I need is the variable torque limiter. Got one on order.
Pitdogg2
Professional
I have never used any blue loctite on my Holosun 508t. I have it on a XDM-Elite 3.8" 10mm. Not once have my screws loosen or broke.
Yes loctite on screws acts as a lubricant and your torque specs will be more than they should be. More than one optic manufacturer has stated their torque specs are for dry fasteners, therefore they should be dry.
Yes loctite on screws acts as a lubricant and your torque specs will be more than they should be. More than one optic manufacturer has stated their torque specs are for dry fasteners, therefore they should be dry.
Warrior9(Ret)
Custom
I’ve used a toothpick and my digital calipers to measure the depth of a screw hole before. Seems to work for me 
I also use double sided tape to hold the screws while I apply the thread lock to them.
Stick one side to a ruler then the screws head first to the other side. I let them dry like that.
I also use double sided tape to hold the screws while I apply the thread lock to them.
Stick one side to a ruler then the screws head first to the other side. I let them dry like that.