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Modify Metal Precision Complete Airsoft AEG Gearbox Shim Set

6 Customer Reviews

by Mona K. on 04/19/2021
"These shims are great, I bought some to shim my M4 and ARP9 and these shims work really well. The different sizes make it easy to tell what shims are what thickness and it makes it so that it doesn't matter if I get them mixed up. They are pretty strong and durable too. I really like that they have a .15mm shim as it can help make your shimming more precise. Overall I would recommend these shims to anyone who is shimming.
by Robert K. on 06/12/2018
"Best shims. I use these in all of my builds now. I especially love the .15mm shim to fill in those spaces just right. Most others brands don't have that "in between" size like that. They are also strong unlike the crummy copper shims.
by Jacob S. on 02/21/2018
"Very solid shims, I use these in every build I do. Some different brand shims tend to bend from time to time causing some potential issues, I have yet for one of these shims to bend. The pack comes with a variety of different sizes also, making fine tuning simplistic.
by Scott D. on 10/02/2015
"These are the only shims I use on my guns. There may not be alot in the package but the diameter-thickness construction makes shimming a gearbox so much simpler and takes the guesswork out of the process. I absolutely recommend these shims over any other type/brand.
by Josh K. on 12/05/2012
"Surprised there are no reviews on this, they are great!

They come in different diameters, the different diameters correspond to their height making shimming a breeze.

Get these over any other brand. No need to guess how thick they are, packaging has a table with thickness of shims.

5/5 Will buy again
by MICHAEL W. on 05/25/2020
"Some are good but most were not perfectly flat. The lip of the inner circles on a lot of them were badly molded or cut or however they make them leaving little flakes of mettle sticking out. When I go to measure them with my calipers they change size depending on where the metals are flaking out the inner edges. Even cut my nail checking for smoothness. I don't recommend these shims. Sry. Just the tiniest little milimeter off will mess your shiming up badly.