GTA

Support Equipment For PCP/HPA/CO2 and springers ,rams => Scopes And Optics Gate => Topic started by: Kragman1 on November 13, 2021, 02:57:23 PM

Title: "I'll have 2 pcs of your finest scope shim material....."
Post by: Kragman1 on November 13, 2021, 02:57:23 PM

.... but what is that exactly?

I have to shim up a scope maybe .015/.020" to clear the plastic flip up lens cover on the front bell.  I'm thinking maybe aluminum tape would be best, but I'd love to know if there's anything better.

Thanks in advance!

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: Jeff Marshall on November 13, 2021, 03:23:49 PM

I use shims cut from toothpaste tube.

When lens covers don't quite fit, I usually sand the bottom of the lens cover.

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: DonC on November 13, 2021, 05:20:32 PM

Brass from a hobby store OR film negatives work good.

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: Nvreloader on November 13, 2021, 05:24:03 PM

Or get height adjustable rings, easy to set and use, plus you can add a couple thousand's for droop if needed..

https://www.ebay.com/itm/353256637947? (https://www.ebay.com/itm/353256637947?)

https://www.ebay.com/itm/324875313237? (https://www.ebay.com/itm/324875313237?)

YMMV

Tia,
Don

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: Kragman1 on November 13, 2021, 05:33:54 PM

Those are all good ideas guys.  Thank you.

I may have an old toothpaste tube available soon, but in the meantime I did turn up some HVAC tape (quite thin aluminum) and tried it.  Its almost exactly what I needed but still I'm making contact with underside of the flip up cover. And I mean juuust barely.

I don't want to double the tape as it doesn't stick to itself, so I'll either find a better shim or I'll take a very small amount off the bottom of the cover.

Of course, once I do that I'll need a 3/8" cheek riser to keep my weld.   .....sigh.....

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: Rick67 on November 13, 2021, 05:44:00 PM

Quote from: Kragman1 on November 13, 2021, 05:33:54 PM

Those are all good ideas guys.  Thank you.

I may have an old toothpaste tube available soon, but in the meantime I did turn up some HVAC tape (quite thin aluminum) and tried it.  Its almost exactly what I needed but still I'm making contact with underside of the flip up cover. And I mean juuust barely.

I don't want to double the tape as it doesn't stick to itself, so I'll either find a better shim or I'll take a very small amount off the bottom of the cover.

Of course, once I do that I'll need a 3/8" cheek riser to keep my weld.   .....sigh.....

https://godagrip.com/cheek-pads-2/


It's what I use.

The SOPMOD attached to my AA S500:




(https://i.imgur.com/f9VomHO.jpg?1)

(https://i.imgur.com/vajoojY.jpg?1)

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: Blowpipe Sam on November 13, 2021, 07:02:40 PM

Friction tape.

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: 7624452 on November 13, 2021, 10:02:45 PM

Aluminum tape.

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: lefteyeshot on November 14, 2021, 12:38:25 AM

Why bother when there are taller scope rings or mounts?

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: Snatchcan on November 14, 2021, 03:05:44 AM

Aluminum cans work quite well if you only need a bit.

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: CraigH on November 14, 2021, 08:09:56 AM

Quote from: lefteyeshot on November 14, 2021, 12:38:25 AM

Why bother when there are taller scope rings or mounts?

Taller rings change the whole exterior ballistics dynamics - sometimes ok, sometimes bad.

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: rash_powder on July 12, 2024, 10:59:22 AM

Go to harbor freight or wherever you prefer and get a set of feeler gauges.  Multiple thicknesses in the perfect size strips. 

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: avator on July 12, 2024, 11:04:16 AM

Quote from: Blowpipe Sam on November 13, 2021, 07:02:40 PM

Friction tape.

This is what I use as well. Many new scope rings come with friction tape on them to help with scope slipping within the rings. Why not use what the manufacturer uses?

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: Frank in Fairfield on July 12, 2024, 04:35:53 PM

Absolutely right Bill.

Title: Re: "I'll have 2 pcs of your finest scope shim material....."
Post by: Novagun on July 19, 2024, 06:14:23 AM

I use double sided cellotape and sometimes a strip of aluminium canworks well