Foxtrot Mike Products Complete FM9 Premium 9mm AR-15 Lower Receiver

Paired this with their 3"upper, added a Radian Raptor Charging Handle, an SBA3 brace, Sylvan Arms folding adapter, and an Olight Baldr Pro-R laser/light combo. Works flawlessly. Funnest gun I own. Everyone who touches it wants one.

The LRBHO is a great (and rare) feature and really hard to find anywhere at this price

Con: high cost-of-ownership because I can't stop shooting it. I have to decide before I leave for the range how many rounds I am going to shoot and not bring any more with me.

Purchased this with the FoxTrot Mike upper receiver. Slapped the two together and fired hundreds of rounds with absolutely no malfunctions whatsoever. For the price and the performance I don’t think I could have found a better deal for the price. Extremely impressed with this product. Very fun to shoot.

I took delivery of my FM upper and lower on Monday. I went to install my brace and noticed the buffer tube was loose. I was able to twist the castle but off by hand. No big deal but that gave me pause so I went ahead and disassembled everything to check it out. During this process I noticed some rough machining so I made sure to smooth everything out. Im definitely more anal than others as I'm a machinist/engineer. I have reassembled everything and it all seems to be working without issue. Both of my other ARs are full Aero builds so I know ai can't expect the same quality for half the price. I will update as soon as I go out and fire it but I don't think it will have an issue. Everything else seems solid I would just recommend giving everything a quick check before heading out to fire the first time.

This is a great complete lower. I have had no issues with it whatsoever. I did purchase the Foxtrot Mike 9mm upper for it. Great quality and finish. I recommend this over any conversion type devices. If you want a 9mm AR, buy this one. You won't be disappointed.

Overall I'm mostly very impressed. Quality compared to my PSA 9mm lower was impressive, that lower needed a bunch of fiddly fine tuning to get it ejecting and feeding. Last round bolt hold open works flawlessly. I combined this with a FM BCG and a PSA upper I already had and everything went perfect for a few rounds then the bolt got stuck partially back. As delivered the buffer detent pin was not properly nested in it's slot in the buffer tube and the BCG could move backwards but the pin turned sideways and the rear of the BCG hung up on the pin. Once I got the receivers separated (not easy) I had to screw in the buffer tube one full turn to correct this assembly error. This would be a show stopper for anyone that didn't have the tools to fix it.

I told myself I didn't need an AR9 for over a year, I've got plenty of 9mm pistols so why an AR9? Finally bought this along with FM9 5" upper and don't regret it one bit! Bought and used 2ea of the Glock 33/rd and Magpul 27/rd mags and had no issues with either. Shot 124 gr ball, 124 gr HP and 147 gr HP from S&B, PMC and Sig, everything functioned perfectly including the LRHO feature. This is a ton of fun (more than I anticipated, lol) and my son and I went through 300 rds before we knew it. I changed out the safety with a 60 degree unit (came with plastic) along with a new trigger. Only slight issue was the mag release rubbed on the lower a little, but a light stoning took care of that while I was doing the initial once-over and lube (no big deal but that stuff bugs me). Fit between the upper and lower was perfect, no slop or wobble. Great pistol at a great price!

I've built many 9mm's and either use the FTM lower or one I've milled. I do change out the spring and the buffer. I use a 5.56 high end spring and a dead blow buffer from Macon Armory, Macon Georgia. This eliminates bolt bounce and lighter on the bolt catch during LRBHO. For the price the Foxtrot Mike lower is the very best value for the money.

Bought this with the 3" upper and wow love it. Definitely recommended.

Like it so far. 200 rds no hiccups other than with the Amend2 33rd mags. Paired it with the FM 3" upper and it's turned into a nice little cqc truck gun. Will most likey purchase FM products again.

Purchased fm9 lower. Had issues feeding and mag was loose in magwell. Emailed FM support and they were great and responsive. Ended up sending the upper and lower back to fm (upper is not a FM product). Turn around was one day, they emailed me when they received it and after gunsmith fixed it anf attached video of it working. Ended up replacing the last round hold and mag release. They are top notch and great customer service. Never even asked for receipt. Will definitely purchase again and highly recommend. Thank you FM