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Posted: 2/16/2021 7:27:26 PM EDT
I have an SR15 upper that I put a Vortex SPARC-AR on... when I tightened down the mounting screw, the head of the torx screw broke off... leaving me with an optic seemingly permanently affixed to my SR15 upper. I can't back the screw out because there's no head on it, and I certainly don't want to try to drill it out and risk my SR15 upper.
Any ideas? 
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Posted: 2/16/2021 7:43:28 PM EDT
[#1]
Gently cut through the aluminum side of the mount shown in the picture either just above the rail or just under (i would go just under)?
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Posted: 2/16/2021 7:45:11 PM EDT
[#2]
Left hand drill bit would be my first choice.
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Posted: 2/16/2021 7:49:11 PM EDT
[#3]
Drill bit and 10 minutes time will right that.
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Posted: 2/16/2021 8:25:14 PM EDT
[#4]
Finally worked up the courage to just drill it out. It worked fine. Drilled just enough, then punched it through with a steel punch. Didn't scratch the upper at all.
Thanks guys. Now to get Vortex to send me a new screw... that hopefully doesn't break this time 
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Posted: 2/16/2021 8:29:32 PM EDT
[#5]
Sorry Roger , You Tiger Now !
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Posted: 2/16/2021 8:46:58 PM EDT
[#6]
This is a lesson. No more Chicom optics on anything Knights.
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Posted: 2/16/2021 9:01:09 PM EDT
[#7]
Quote HistoryQuoted: This is a lesson. No more Chicom optics on anything Knights. I know right? What are you doing putting that thing back on there OP? |
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Posted: 2/16/2021 9:01:13 PM EDT
[#8]
I’d throw what’s left of the optic in the trash and not buy anymore Vortex garbage.
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Posted: 2/16/2021 9:03:37 PM EDT
[#9]
Vortex sparc on an SR15, that is a travesty. Glad you got it off.
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Posted: 2/16/2021 9:08:29 PM EDT
[#10]
I have a Vortex Sparc AR on a BCM frankengun that I use for plinking. I dont think I'd put one on a KAC rifle. In fact, I dont think I'd put one on my frankengun again. It hasn't given me any issues, but I think I'd rather just save up for an Aimpoint.
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Posted: 2/16/2021 9:35:37 PM EDT
[#11]
Quote HistoryQuoted: What are you doing putting that thing back on there OP? It's my placeholder until I can save a little more for a T-2. It's what I happened to have lying around in the bin. |
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Posted: 2/16/2021 10:06:06 PM EDT
[#12]
Quote HistoryQuoted: It's my placeholder until I can save a little more for a T-2. It's what I happened to have lying around in the bin. Have you been able to shoot it? I wonder about folks that pinch pennies for nice rifles but what about ammo costs? |
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Posted: 2/16/2021 10:42:02 PM EDT
[#13]
Holy Crap! I just put the same optic on a KAC. Does anyone one make a QD mount for the Sparc which works?
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Posted: 2/16/2021 10:48:50 PM EDT
[#14]
For anyone else with this problem and scared to use a drill, d.wilson will laser a slot in the screw for removal.
Obviously longer to send it in, but arguably safer. |
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Posted: 2/16/2021 11:08:56 PM EDT
[#15]
I won’t argue national pride, or the value of an Aimpoint - but I will say that I’ve beat those Vortex up and they keep on running.
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Posted: 2/16/2021 11:17:27 PM EDT
[#16]
Quote HistoryQuoted: I won’t argue national pride, or the value of an Aimpoint - but I will say that I’ve beat those Vortex up and they keep on running. Just the mounting bolt quits running. |
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Posted: 2/16/2021 11:35:03 PM EDT
[#17]
You shouldn’t have to tighten any optic down enough to break a screw. Maybe get a torque driver.
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Posted: 2/16/2021 11:38:31 PM EDT
[#18]
This is not GD
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Posted: 2/16/2021 11:39:33 PM EDT
[#19]
Quote HistoryQuoted: It's my placeholder until I can save a little more for a T-2. It's what I happened to have lying around in the bin. Sure..... 
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Posted: 2/17/2021 12:34:21 PM EDT
[#20]
Quote HistoryQuoted: Holy Crap! I just put the same optic on a KAC. Does anyone one make a QD mount for the Sparc which works? An ARMS 31 QD base will work & Midwest Industries makes a QD mount for the SPARC AR. |
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Posted: 2/17/2021 1:08:03 PM EDT
[#21]
Quote HistoryQuoted: Sure..... Who are you to call the guy a liar? He came here for help. He got it. No need to be a jerk. |
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Posted: 2/17/2021 1:22:50 PM EDT
[#22]
Quote HistoryQuoted: Sure..... Lol wtf. |
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Posted: 2/17/2021 2:28:09 PM EDT
[#23]
Edit. oops looks like you have it covered.
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Posted: 2/17/2021 2:30:23 PM EDT
[#24]
Quote HistoryQuoted: Now to get Vortex to send me a new screw... that hopefully doesn't break this time Hopefully you won't over tighten it this time.... Hint: chinky fasteners will only take half the torque of a quality one. |
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Posted: 2/17/2021 10:07:51 PM EDT
[#25]
Quote HistoryQuoted: An ARMS 31 QD base will work & Midwest Industries makes a QD mount for the SPARC AR. Thank you very much! I just ordered the Midwest QD mount! |
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Posted: 2/17/2021 10:32:23 PM EDT
[#26]
ACOG that bad boy.
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Posted: 2/17/2021 11:49:35 PM EDT
[#27]
If you are going to run optics with the holosun/low end vortex style clamp mount, cheap insurance is a wheeler fat wrench.
They’re fine if you properly torque them. The issues arise when you over torque those style mounts, which isn’t hard to do. |
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Posted: 2/18/2021 1:02:06 AM EDT
[#28]
Quote HistoryQuoted: This is a lesson. No more Chicom optics on anything Knights. Aimpoint RDS for a KAC. SR15 deserves nothing else in that vein. |
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Posted: 2/18/2021 5:29:46 PM EDT
[#29]
Quote HistoryQuoted: Have you been able to shoot it? I wonder about folks that pinch pennies for nice rifles but what about ammo costs? Yeah, I've only got a few hundred through it so far, but plan on shooting it quite a bit. |
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Posted: 2/18/2021 5:30:52 PM EDT
[#30]
Quote HistoryQuoted: Who are you to call the guy a liar? He came here for help. He got it. No need to be a jerk. Thanks. |
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Posted: 2/18/2021 5:32:32 PM EDT
[#31]
UPDATE:
Vortex Customer service was great. Sent a new mount right away. Also, apparently, there are some good aftermarket QD mounts for it that I might look at. I'm for sure purchasing a torque-limiting screwdriver thing so that I don't over-torque it again. |
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Posted: 2/18/2021 6:54:52 PM EDT
[#32]
Quote HistoryQuoted: Sure..... 
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Posted: 2/18/2021 8:39:40 PM EDT
[#33]
Quoted: I have an SR15 upper that I put a Vortex SPARC-AR on... when I tightened down the mounting screw, the head of the torx screw broke off... leaving me with an optic seemingly permanently affixed to my SR15 upper. I can't back the screw out because there's no head on it, and I certainly don't want to try to drill it out and risk my SR15 upper. Any ideas? https://i.imgur.com/2HfbEb9.jpg That is what happens when you buy junk... 
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Posted: 2/19/2021 2:36:37 AM EDT
[#34]
Quote HistoryQuoted: I’d throw what’s left of the optic in the trash and not buy anymore Vortex garbage. QFT Been there. Tried that. Never again. |
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Posted: 2/19/2021 2:37:32 AM EDT
[#35]
Quote HistoryQuoted: I won’t argue national pride, or the value of an Aimpoint - but I will say that I’ve beat those Vortex up and they keep on running. Aimpoints have been burned in a house fire and keep on running. Not sure a Vortex can say that. |
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Posted: 2/20/2021 2:06:26 PM EDT
[#36]
I'm getting the replacement screw from vortex soon, anyone know what it's actually supposed to be torqued to so I don't snap it off again?
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Posted: 2/20/2021 2:32:29 PM EDT
[#37]
Vortex will give you that and they are very responsive.
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Posted: 2/20/2021 2:37:30 PM EDT
[#38]
KAC has an evolutionary defense against cheap BS trying to attach itself to it.
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Posted: 2/20/2021 3:40:07 PM EDT
[#39]
There is a reason Vortex has great Customer Service.
They do it a lot. Pretty much everything I've bought from them has had to go back for some reason. Factor in time, aggravation, ammunition to re-zero an optic has made this wash - rinse - repeat no longer worth it to me. Finally sold my last piece of Vortex after getting a NIB scope back in a week after sending them one with a minor, but obvious issue. Good luck. |
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Posted: 2/20/2021 5:24:37 PM EDT
[#40]
Quote HistoryQuoted: I'm getting the replacement screw from vortex soon, anyone know what it's actually supposed to be torqued to so I don't snap it off again? I don’t know the exact specs from vortex so I feel a little reluctant to reply but I would say around 15-18 inch lbs, not ft lbs, with some blue lock tight. |
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Posted: 2/25/2021 9:03:49 PM EDT
[#41]
Quote HistoryQuoted: UPDATE: Vortex Customer service was great. Sent a new mount right away. Also, apparently, there are some good aftermarket QD mounts for it that I might look at. I'm for sure purchasing a torque-limiting screwdriver thing so that I don't over-torque it again. OP: I received the Midwest mount the other day from Midway and it was a perfect swap for the factory mount without the stupid torx screw mount (still need to use the 4 torx mounting screws from the original mount but that is a one and done). I am very happy and its a game changer for the real deficiency in this system IMHO. The original mount went into the box and that is were it will stay. I suggest you do the same. |
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Posted: 2/26/2021 8:35:29 AM EDT
[#42]
Quote HistoryQuoted: OP: I received the Midwest mount the other day from Midway and it was a perfect swap for the factory mount without the stupid torx screw mount (still need to use the 4 torx mounting screws from the original mount but that is a one and done). I am very happy and its a game changer for the real deficiency in this system IMHO. The original mount went into the box and that is were it will stay. I suggest you do the same. Thanks! |
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Posted: 2/26/2021 9:16:42 AM EDT
[#43]
 Time to throw up a Vortex pic to counter all the Vortex hate  My SPARC AR has been great with a ADM QD mount. Battery life has been good. When it dies someday... it's get a Aimpoint. |
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Posted: 2/26/2021 9:40:52 AM EDT
[#44]
There is nothing wrong with Poortex stuff....You just don't put one on anything Knights Armament.
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Posted: 2/26/2021 9:57:49 AM EDT
[#45]
Steve Fisher would say a lot of you are wrong about Vortex and KAC.
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Posted: 2/26/2021 8:28:53 PM EDT
[#46]
Wow...sounds like I need to work on my elitism...
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Posted: 2/26/2021 9:06:52 PM EDT
[#47]
Quote HistoryQuoted: Aimpoint RDS for a KAC. SR15 deserves nothing else in that vein. I will have to go with this, an Aimpoiint M4S in a Geissele mount would be perfect. This is what I have on my Mod 1 and really considering swapiiing out the optic on the Mod 2 and going with a M4S |
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Posted: 2/27/2021 10:33:51 AM EDT
[#48]
This is funny, the AR crowd poo-pooing a less expensive viable option. I agree the stock mounting system sucks for the Sparc but quite frankly so does, say, the mounting system on the Aimpoint magnifier mount to a lesser extent because it is not QD either. And while I have no issue with the large knob mount on the Aimpoint CompM4 series, I bet there are those that would say it sucks and that was never a "cheap" optic. I have looked at Geissele mounts that get so much praise, but for those dollars they are not DQ so I have no interest. Dont get me wrong, I use Aimpoints and have for 20 years, but there are other options. YMMV of course.
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Posted: 2/27/2021 11:22:54 AM EDT
[#49]
Quote HistoryQuoted: This is funny, the AR crowd poo-pooing a less expensive viable option. I agree the stock mounting system sucks for the Sparc but quite frankly so does, say, the mounting system on the Aimpoint magnifier mount to a lesser extent because it is not QD either. And while I have no issue with the large knob mount on the Aimpoint CompM4 series, I bet there are those that would say it sucks and that was never a "cheap" optic. I have looked at Geissele mounts that get so much praise, but for those dollars they are not DQ so I have no interest. Dont get me wrong, I use Aimpoints and have for 20 years, but there are other options. YMMV of course. AP Twist Mount is QD and bomb proof. |
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Posted: 2/27/2021 2:59:16 PM EDT
[#50]
Quote HistoryQuoted: AP Twist Mount is QD and bomb proof. Absolutly and I forgot about this mount |
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