1/2 x 28 Barrel Shim Muzzle Brake Alignment Shims Kit 223 556 5.56 Indexing Stainless (9 Pieces)

Works. Easy to fine tune. No complaints.

Awesome product and exactly what I needed. Great kit with a variety of sizes to make small/large adjustments for timing issues. Very fast shipping. Product arrived a day early. Thank you. Highly recommend seller.

I ordered two packs of these .233/5.56mm muzzle shims (1/2-28) to hopefully handle my Brake and Silencer adjustment needs. I didn't receive them free for analysis, I paid. Specs and variances like this should be clear for all to see, not sure why sellers don't help us out with the numbers.I checked each shim for roundness, flatness and inside/outside sizes. Sizes measured with a Mitutoyo AOS Absolute digital caliper, model CD-6" ASX /500-196-30. Although it's extremely accurate, I doubt that the 3rd and 4th fractional digits would stand up in court...Each pack includes: Qty / Thickness / Diameter Five* / .004" / .7495" Four / .008" / .75" One** / .058-.059" / .7485"All internal holes were consistent @ .501" / (12.73mm).* One pack was missing a single small (.10mm) shim, although it could have rolled under something in my shop. I surely couldn't hear it bounce.** One of the two large shims was .002" thinner than the other. The thinnest one appeared to have abrasions on one side, consistent perhaps with being slid on a rough surface.Note: I didn't think about the color (stainless) when I placed the order, but it blends into my uncoated titanium 22LR silencer very well. However, the SS is oblivious between my black .308 can and whichever rifle it's sitting on. Biggest thing here is absence of rust, you can paint SS.

Not bad. The only comment is that the outer diameter of the shim is a little large - slightly protruding against the barrel diameter. It's not enough that you would notice it unless you are staring directly at it, but if you run your finger on the barrel you'll definitely feel the protrusion. I wish it'd flush with the barrel or slightly thinner.

Used these obviously to time a muzzle brake. The shims are good quality. I ended up using only the thick washer by polishing it down with some wet-dry sandpaper.

I only needed two shims. But finding the right combo took some time. These are way better than a crush washer if you don't like the gap a crush washer makes.

Worked well for timing my muzzle deviceGreat value, by no means a precision shim kit should that be what you desire, but functional and 20 percent of the cost of a precision set.

Good. Functioned so perfectly they alll were used