View Full Version : 1P21 Repair Needed!
08-08-2010, 11:57 AM
Took my PSL to the range for the first time in a long time now that I have some ammo, and proceeded to shoot the reticle glass out of the scope!!!! Very disappointing. This was a purchase from an individual several years ago.
Are there any places that does repairs on these?
I have taken it apart to the point that I know the seal either came loose or did not ever get glued in correctly. It appears I need to attach it back into its locking collar with either an epoxy, some sort of caulking, or some other vibration-resistant attachment method. I may try this myself, and use one of those nitrogen sprays used for food storage to restore its fogproof nitrogen feature. All I really need are some suction cups or long hemostats to hold the thing in place, as I'm doing it from the optic end so it is kind of a ship-in-the-bottle repair.
Budda Budda Jam
08-08-2010, 12:32 PM
Is that the stock scope or is it a 3x9x42 power scope?
08-16-2010, 04:27 PM
It is a 1P21 - a 4-10x "military" style scope. Not the Romanian scope.
08-16-2010, 05:44 PM
If you want to fill it with an inert gas you could bag the components before final assembly evacuate the bag fill with nitrogen then evacuate again and fill with nitrogen and put it together in the bag. It would probably be easier to use argon and "pour" it into the scope while your are assembling it. Could even put the scope components in a rubber made tub and fill it with argon and assemble the scope in there.
If you could take some pictures of it dissembled I have found threads with pictures of the pso 4x and the psop 8x but none of the 1P21.
08-16-2010, 06:18 PM
I'm not worried about the gas fill, that should be relatively easy. I'm mostly worried about how to re-attach the reticle glass since it seems that it would eventually shoot back out. I swear it looks like the reticle was glued into the frame. It doesn't look like it is braced on the forward side so it looks like only the adhesive is holding it in place.
This is the scope - I'll have to snap pics of the internals:
08-16-2010, 06:36 PM
I wonder if the airsoft guys have started making copies of psl scopes too. A glued in rectile glass doesn't sound overly built like ak parts should be. FFIW my sister owns a resturant and they use argon to purge air from the fancy ladd bottles of wine that they've sold a glass from. She says the argon is heavier than air (as mrtank said) so they just stick a hose in the bottle and give it a little shot of argon to displace the air.
08-16-2010, 06:57 PM
The gas doesn't have to be nitrogen or argon. It can be room air, just as long as it's completely (or nearly so) dry.
Just put a scope in a doubled plastic bag with a lot of dessicant, and do a final assembly within the bag after about a week of "soaking."
As far as the reticle glass retention, could a split ring round wire spring be used to retain the glass? Maybe after milling a light groove so that it's held in place while keeping pressure on the glass?
09-07-2011, 10:43 AM
Took a whole year, but I finally got out there and caulked that little glass into place. I shot a few mags through it at the range Monday, and so far so good! I'm extremely pleased this $300 scope is working again. Unfortunately there is some debris on one of the lenses that I did NOT take apart, but it isn't the end of the world. Now that it is function checked, I need to get some ammo loaded up and spend some quality time sighting it in.
I never did snap pics of it apart, but if you look real close at the little holes surrounding the tube, you will see REALLY SMALL screws in there. That's what holds the tubes and front glass in place. VERY simple... don't really need pics. You remove the gooey black tar waterproofing stuff, and use one of those small precision screwdrivers to remove the screws. Then the tubes unscrew and presto there's the reticle mount. Then I cleaned and caulked the glass, and mounted it back up to ensure it was level before re-attaching the front tube. It was tedious work because you want that glass C-L-E-A-N! You can see fingerprints through the optic, so you know instantly if your cleaning was successful.
Here's hoping it holds up! I figure the caulk will be more robust in cold weather than any glue. If it survives the sighting in process (in addition to the 20 rounds it has already endured), then I believe it will be fine.
After it gets sighted in, I will buy one of those nitrogen cannisters for long-term dry food preservation, and refill it with nitrogen to ensure it stays fog-proof. ;)