Reviews & Ratings for Stern Defense AR-15 10 inch Assembled Upper Receiver, 8.5 in 9mm Barrel w/MLOK Rail — 5 reviews — Page 1

It’s awesome, works flawless. Using it with a PSA px9 lower. Runned about 600 rounds with no issues.

I purchased the 8.5" upper and a Stern Glock mag adapter together. Check out my review of the adapter elsewhere. The two combined resulted in one the coolest, most fun shooting AR-style platform I've ever owned. The build of upper was tight. Every part torqued just right with no looseness or gaps anywhere. There was practically no seam between the upper and my random, no name AR lower. The finish was smooth without any discernible flaws in the paint/coating. The M-LOK handguard was finished very nicely with no razor sharp edges that you get from cheaply made Asian handguards (you know what I'm talking about) and the picatinny rails lined up perfectly with the upper. I disliked the cuts on the handguard until I realized they are a bunch of "S" for Stern Defense then I thought "okay, that's pretty slick". Charging handle is perfect for one handed racking. Bolt carrier rides very smooth with none of the grittiness you feel with with cheaper bolt carriers. I tested the build with about 400 rounds of UMC and S&B 115 gr FMJ, and 20 rds of Federal JHP at 50 yards on a steel plate. Using a 1.5X ACOG, the gun produced NO MISSES. Even walking up on the plate from 15 to 5 yards in rapid fire (semi-auto...private range) the gun was really controllable with barely any flip. Recoil felt like a 5.56, just lighter. So no slower or faster, just lighter. Mag changes with the adapter was slick, almost as fast as a standard AR tac reload. I also thought the muzzle blast can was ...
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Wow this thing is accurate! Hole on hole at 25 yards, and i can reach out to 100 no problem nailing 12x12 plates! I’m using a regular h2 buffer and a mean arms endo mag conversion and man is this a lot of fun! I’ve put 350 rounds through it and it hasn’t missed a beat EXCEPT when i try n run Remington umc. I’m sure it’s the way the endo mag lines it up with the barrel. Pmc and Winchester I’ve had zero jams. I tried it on a friends 9mm lower and it actually has less recoil on my 5.56 lower with no change at all except the endomag. I’m thinking it needs a binary trigger lol!

Quality build and flawless function. Handguard is just plain cool looking. Blast can is effective, much less noise then my other 9mm pistols (at least for the shooter) Accuracy seems ok but I have just been shooting standing unsuported. Paired with Stern Defense beretta magazine adaptor and couldn't be much happier unless they came out with a dedicated lower that took beretta mags. Just a blast to shoot