Polymer rear sight obstruction

[Charlie Martinez]

Just installed a set of polymer sights on my AR 15 rail and the small peep opening has a tiny spider web-like obstruction that really impairs my sight picture. I have tried using sowing needles to pick it out and running a string through the tiny hole to scrape it out but it will not go away. I may be a remnant of polymer material that stayed behind after it was removed from the mold but not 100% certain.
The sights were a gift so I can't return to the manufacturer (I don't even know who made them). Has anyone had a similar experience and if so how did you resolve?

 

[gotboostvr]

Got a picture?

A drill bit might clean it up best.

 

[Charlie Martinez]

Got a picture?

A drill bit might clean it up best.

The problem is that the peep hole is extremely small. I doubt there's a drill bit that would fit. I really want to try fixing the problem without altering the sight. I'll think of something.
Thanks

 

[Varminterror]

Most likely, a drill bit exists, but naturally, you may not have one.

I’d be tempted to run a needle into it, then connect a 9v (maybe need bigger power supply?) battery to both ends and let the needle get hot, spin it, pull it out. Equally, inserting a needle into the end of one of my soldering irons would do the same.

 

[chicharrones]

I've done the drill bit trick to my Beretta CX4, but that was to increase the diameter of the short range portion of the sight to be more usable in low light.

When I had a Beretta Neos Carbine, the rear aperture sight windage screw wouldn't move, so I warmed up the sight with some heat. To my dismay the plastic aperture didn't like that at all and the edges got rolled a bit. So, all I'm saying here is to be very careful with heat on a plastic aperture.

One thought is to get a very small finishing nail, or something similar, and clip the pointed end into a flat with wire cutters. The flat will have a chisel like finish from being cut and could be used to "auger" out the opening. Possible to do the same thing with a paper clip of an appropriate size.

 

[Ranger99]

Find a friend with a welding tip
cleaner tool
Essentially an assortment of tiny
drill bits with a handle/holder

 

[Charlie Martinez]

I agree that heat will probably remove it but a hand held tool in such a tiny opening would not be steady enough to run through without damaging the aperture.

I tried a paper clip initially but the aperture is even smaller than a paper clip wire. So far a sowing needle and thread is all I have been able to fit through. I tied a few knots on the thread and ran it back and forth to try to snag or scrub it loose but it doesn't phase it.

I have a Nikon 300 BLK 2-7X scope I can put on it while I fix the problem. I have found very reasonably priced scope mounts on the net and I am trending toward the quick release type but there are some much higher priced ones that make me wonder about the quality of the inexpensive ones.

All suggestions on scope mounts are welcome.