Reviews by Boy Knee Sand Is
Non-Adjustable Ejector, Useless Customer Service at Stern
Written on Feb 27, 2026
This product is way overpriced for not being able to adjust the height of the ejector, and Stern customer support was useless.
I tried installing this in my setup that has a mil-spec upper and lower and even a Stern bolt but the ejector sat like 1/16" lower than it should in the bolt cutout. I tried reaching out to Stern to see if they had a solution and they responded at first but then ghosted me without a resolution.
Don't waste your money gambling on an expensive adapter that can easily be defeated by tolerance stacking. Just get a dedicated lower.
I tried installing this in my setup that has a mil-spec upper and lower and even a Stern bolt but the ejector sat like 1/16" lower than it should in the bolt cutout. I tried reaching out to Stern to see if they had a solution and they responded at first but then ghosted me without a resolution.
Don't waste your money gambling on an expensive adapter that can easily be defeated by tolerance stacking. Just get a dedicated lower.
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