Foxtrot Mike Products Complete 9mm AR-15 Upper 7" for Glock Style Receivers - 8.75" M-LOK Rail - Blast Diffuser

I rarely say this about a product, but it's just too cheap for how awesome it actually is. I've put 3k rds through it and it eats everything I've fed it with zero jams or misfires. Light as a feather, rear charging handle is fun and easy to use and everything is machined flawlessly to run with most milspec lowers. LRBHO is the most consistent I've experienced with any AR9. The only downside is you'll need a new barrel to run it suppressed but I knew that going into the purchase and they have a trilug option for that if you plan to go that route. Couldn't recommend this thing more for the price!

I have two different FM uppers, both have been completely reliable thanks in large part to their build quality, fit, and finish. I put front sights on both with no issues whatsoever, and I have never once hurt my knuckles when operating the charging handle. What I have done is expend a lot of 9mm rounds, got other people into shooting because of the fun factor of this build, chuckled at the amountof money my buddies spent on the much heavier and chunkier CZ Scorpion, and came back to PA to pick up a 3rd upper for another build.

Excellent quality and feel! Will be buying more of their PCC stuff in the future!

Also about the previous post about MBUIS. Its not cheap i actually won them in a raffle but Griffin Armament 's BUIS work perfect without modification. The only things i can say bad is its not suppressor friendly which i kinda figured beforehand. But also that the charging handle is plastic is why i gave 4 instead of 5. And this thing eats 115 and 124's like candy.

Purchased this for my first AR-9 build. Upper runs flawless and is supper accurate with a Holosun red dot. Love the forward charging handle.

First of all the workmanship on this is excellent. The hand guard to receiver fit seamlessly. The rifle cycles great and having a side charging handle on a short length pistol setup means I can keep it close and tight to the chest without having the typical charging handle near my face. I was still able to use iron sights at the front with minimal adjustments.
This is well worth every cent and as I shopped around the best on the market.

I bought this system about a year ago and fell in love. It cycles great, looks cool, and generally meets every need I had for a pcc...my trouble came when trying to get the diffuser cap from FM products. It isn't available anywhere other than contacting the company and mailing a check. So I sent a check through my bank to the address confirmed through the email on their website. I waited patiently for my cap and folding charging handle. They never came so I reached out, we then had a few emails exchanged where I double checked it was the correct address and was told that it was indeed the correct address. I have yet to receive the parts or any correspondence regarding them. I love the platform and wish I could finish it, but I got tired of writing emails.

1) Charging handle is too small and requires dragging your knuckles along the rail. I wear gloves, so it was not too bad I can live with that. I will probably machine a larger offset one to fix this later.
2) No way to mount any front sight due to high small charging handle. Even if you get it on there, now you drag your knuckles across that.
3) Does not fit on my New Frontier glock lowers. Most bummed about this. Rear takedown barely goes in with too much effort. Bolt hangs inside buffer tube due to being too high. Deck height is just a few thou too high not allowing the two to mate up right resulting in the bolt riding too high. Same fit on 3 different lowers.

Otherwise it looks well made. I'm debating modifying my NF lower or doing a build on a AR lower using endomags. Did not want to buy more new mags.

I bought this upper and I could not be more pleased with the quality workmanship. Foxtrot Mike FM-9 was recommended to me and I have to say, this is probably my favorite gun to shoot. I even let my brother and crazy sister-in-law shoot it, and they loved it so much that they bought one too!

Also the Foxtrot Mike customer service is a great. I had a missing anti-walk pin for the trigger on the lower that I bought to couple with this and I received a response in less than 24 hours after I contacted them. They sent me a replacement the next day! I completely recommend this product. Of course, Primary Arms is awesome as well

love it. super fun and very accurate. Fit perfectly on my baby snek lower from psa. so far no hiccups. only been to the range once with it but im really enjoying it. Side charging handle was a little stiff but with some oil, it works great!!