Foxtrot Mike Products .223 Wylde AR-15 Barreled Upper Receiver - 15" M-LOK Rail with Muzzle Brake - 16"

Manufactured by Foxtrot Mike Products
SKU: PA-FM556-16
MPN: PA-FM556-16
Manufactured by Foxtrot Mike Products
31 Reviews
$249.99 $299.99

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Details

Details

Why build an AR-15 from the ground up when you can get a head start with this upper from Fox Trot Mike Products? The FM AR-15 upper receiver assembly comes with a large assortment of features and improvements over standard AR platform uppers. The monolithic upper and handguard are attached via a proprietary locking system to ensure that it doesn’t loosen over time. This free float rail also uses the M-LOK system, so you can attach your favorite lights, grips, or other accessories. Underneath the M-LOK handguard is a 16” 4150 chrome moly barrel. This complete AR-15 upper receiver group is a great option if you want to quickly assemble an AR-15 for home defense or the range.

Features:

  • 16” .223 Wylde barrel with FM products 4-port Micro muzzle brake
  • .223 Wylde chambering
  • 1:8 Twist rate
  • Lightweight barrel profile
  • 41v50 Barrel steel
  • 15” M-LOK free float handguard
  • Mid-length gas system
  • .625" Patent pending fail-proof gas block
  • Proprietary handguard / upper interlock keeps handguard true to the upper
  • Handguard and upper made from a billet of 6061-T6 aluminum
  • Type 3 hardcoat anodized finish
  • Weight: 3.2 lbs.
  • Total Length: 24.125"
  • Limited lifetime warranty through Foxtrot Mike Products


This AR-15 barreled upper receiver group is designed to be compatible with most AR-15 style lower receivers. The receiver and handguard are machined from 6061-T6 aluminum and have a Mil-Spec Type 3 hardcoat anodized finish.

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Specifications

Barrel CoatingSalt Bath Nitride
Barrel ContourLightweight
Barrel Length16
Barrel LiningSalt Bath Nitride
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandFoxtrot Mike Products
Caliber Gauge.223 Wylde
ColorBlack
FinishHardcoat Anodized
Gas System LengthMid-Length
Gas System TypeDirect Impingement
Handguard15 in M-LOK Rail
Muzzle DeviceMuzzle Brake
Thread Pattern1/2 X 28
Twist Rate1:8
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

31 reviews

4.4

Solid upper, blemish rich

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So I bought 3 of these for $199 during the 4th of July sale. For the price I paid for them I’m happy…HOWEVER. If I had paid anymore than $199 for these I would be sending them back to primary arms for an exchange or refund.
Pros: I love the proprietary upper to handguard mating. This makes turning of the handguard impossible and also ensures the barrel nut can not back off. The M4 feet ramps are decent. Barrel chamber is clean and smooth. Barrel chamber lugs are smooth and well machined. Rifling is excellent. Acceptable fit between upper and milspec lowers.
Cons: machine marks on gas blocks, handguard mlok slots have metal shavings still attached from machining. Metal shards have been coated, but easily break off. Finish on the receiver is thin and has high edge wear directly out of the box.

All in all it’s a solid upper. $200 is a wonderful price. No way I’d pay any more than that for the craftsmanship.

Great lightweight upper

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Fit and finish are excellent, and it's noticeably lighter than the upper it replaced. The muted brass deflector, lack of forward assist, and slim handguard make for one svelte upper. Enlarged relief around the bolt catch should accommodate many of the largest on the market. FMs fail-proof gas block is different and ingenious, I expect no problems from it. Very pleased with this purchase.

Nice

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Yeah; the price was right all as changed now due to new CNC. so good luck Shipmates.

Excellent value upper from FM

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The upper is just as expected for it was very nice and smooth. I have not shot this yet so I cannot say much on accuracy but knowing that FM stands by their products I am confident that this will not be any issues. Love the fact that this does not have the thumb assist so this makes it different from the others. The only thing that is a trademark of FM is their crappy shipping box and lack of any packing material. Also the muzzle I got was the standard birdcage and not the one that was noted…however that don’t bother me cause I had intentions of changing it anyways but that muzzle + poor packing is why I cannot give 5-stars.

My Bad

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Oops, not a Gen 2 setup. Darn, not a completed upper receiver. On the flip side, a real nice barrel with muzzle break, hand guard, and receiver all put together. The fit and finish are very good. Need to add a BCG and charging handle to finish the upper to working status. Also need to get a complete lower to have a full rifle. It has been a learning experience so far, though I still want a FM Gen 2 with adjustable gas block (this one is fixed). A good place to start if you want to build your basic AR-15. Shows I need to spend more time looking at the details, as I said, my bad.

Overall Very Nice for the Money

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I purchased this upper for a lightweight build, but its not as light as I expected due to the billet upper and handguard. It is well balanced, however. The upper and lower handguards mates very well and it’s a very clean design. It came with an A2 comp, not the one in the desc. It has M4 feed ramp extensions. The gas block is pinned. I built it with an Anderson nitride BCG, carbine length extension tube with a PSA carbine buffer spring and 3 oz buffer. I sighted with PMC Bronze 55gr 223, 2900 FPS. I consider this lower power ammo. 40 rounds all fed and ejected properly. Almost no recoil at all. This upper is NOT over-gassed! Bolt hold open did not work with this ammo. I tried numerous other 55 gr 223 and 556 and the bold hold open worked every time. Some aftermarket bolt catches will not fit such as the Strike Enhanced with the large paddle to the left, because the thickness of the upper and the machining. A regular enhanced Strike bolt catch fit.

Good to go!

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Ordered upper on sale. Took it out for a quick range trip and put about 50 rounds of standard 55 grain 223 through it. Ran flawlessly. Only downside is the barrel heated up pretty quickly. Overall very pleased with product and would buy again.

Solid upper

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Nice upper. Finish matches Anderson lower very nicely. Barrel is very accurate. M4 feed ramps are nice. Chamber and bolt lugs are clean. Machine marks on gas block but no big deal.

Awesome product !!!!

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I am very impressed with the quality of this upper.
I got it on SALE, and it all looks fantastic. You will not be disappointed. I’m planning on getting the FM 9 when it goes on sale again. Thanks PA

Quality Affordable Upper

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Upper mates up with the handguard nearly perfectly. Handguard screws needed to be torqued. Some were loose. The gas block is pinned. It had an A2 brake, not the advertised one. Placed on a lower with a carbine receiver extension, PSA carbine spring and a 3 oz buffer. I shot 40 rounds with PMC Bronze 223 (2900 FPS) ammo. Almost no recoil, but under-gassed. It cycled and fed but would not hold the bolt open on the last round. I used other 556 and 223 ammo and it shot very smooth and the bolt held open on the last round. May not fit some aftermarket, bolt catches. The billet upper is thick and has a spot milled out for the bolt catch that has a rear bias. Fit and finish is awesome. Can't comment on accuracy I only shot it at 25 yards.