PSA 18" CHF Mid-Length Length 5.56 NATO 1/7 Heavy 15" Precision Lightweight M-Lok Upper - NO BCG/CH - 516444448

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PSA 18" CHF Mid-Length Length 5.56 NATO 1/7 Heavy 15" Precision Lightweight M-Lok Upper - NO BCG/CH - 516444448


Quick Overview

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SKU: 516444448
UPC: 516444448
MFR#: 516444448
  • Barrel Length: 18"
  • Gas System: Mid-Length
  • Barrel Profile: Heavy
  • Barrel Steel: Hammer-Forged Chrome Moly Vanadium ("Machine Gun Steel")
  • Chrome Lining: Yes
  • Muzzle Thread: 1/2-28
  • Chamber: 5.56 NATO
  • Twist Rate: 1 in 7"
  • Barrel Extension: M4
  • Diameter at Gas Block: .750" 
  • Gas Block Type: Low-profile
  • Muzzle Device: A2 Flash Hider
  • Receiver Material: Forged 7075 T6
  • Receiver Type: M4
  • Handguard Type: PSA Precision 15" M-Lok Lightweight Rail
  • Bolt Carrier Group Included: No
  • Bolt Steel: N/A
  • Bolt Carrier Profile: N/A 
  • Charging Handle included: No 

Add To:

Barrel: A proprietary blend of Hammer forged chrome molly vanadium made by FN that is referred to as "Machine Gun Steel" by virtue of its required use in FN's M249 and M240 weapons. The hammer forging process work hardens the steel, making it more durable. In addition, the chrome process for the bore allows for a lining almost twice as thick as a standard M16 for enhanced durability. Chambered in 5.56 NATO, with a 1/7 twist, M4 barrel extension, and a Mid-length gas system. This 18" heavy profile barrel is Mil-spec phosphate coated, High Pressure tested and Magnetic Particle inspected. The barrel is finished off with a 15" PSA Precision Lightweight M-Lok free float rail and an A2 flash hider.

Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring T-marks, these upper receivers are made for us right here in the USA.

Each upper is assembled to order with US-made parts, and test fired to check gas function. Does not include bolt carrier group or charging handle.

SKU: 516444448
SKU 516444448
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
SKU: 516444448

Questions and Answers

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Browse 4 questions Browse 4 questions and 5 answers
Is the barrel marked FN?
Tony621 on Jun 7, 2018
BEST ANSWER: 18” was stamped with the FN logo and also HF MP 5.56 NATO 1/7
Is the gas block pinned..?
Timothy T on Jun 6, 2018
BEST ANSWER: No, the two I received had gas blocks that were attached with two set screws on the bottom. I put them both on FNH upper receivers and it was an easy swap with these blocks. Grab some blue Locktight, there was none on my set screws.
The title and description say rifle length gas but the description of the barrel says mid-length gas and the photo kinda looks mid-length. So which is it?
Tim M on Jun 6, 2018
BEST ANSWER: Mid length
Will this upper with the mid length gas system run steel case ammo fine???
Nirav P on Jul 2, 2018


5.0 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Well worth the investment
Love it. One of my favorites. Worth the extra money for sure
July 7, 2018
3 months ago
Unicorn upper
This a some what of a unicorn since FNH does not have a bunch of mid length 18” barrels floating around. Also, most 18” barrels on the market are of the SPR MK12 variety and this ain’t it. Reminds me of a M4A1 barrel just longer. That being said, works like it should, very solid setup for a upper. Only drawbacks come from the rail, the m lok rail is on the heavy side and needs to be tightened once received. Once you torque it down it’s on there for good, actually very easy to remove with a Allen key so it could be “field serviceable.” This is combat barrel, not a match barrel, you can get 1moa with match 69grn but it’s made for milspec 5.56. This is truly a well build offering from PSA, extremely happy.
July 7, 2018
3 months ago
Impressive for the price
After much research I purchased this upper for an ongoing build. The item was shipped in a very timely manner & was packaged with the care I would give my mother’s best china. The barrel is produced in the USA by Fabrique Nationale one of the worlds foremost firearms manufacturers. The barrel was stamped with the FN logo HF MP 5.56 NATO 1/7. It comes with a PSA mid length gas block, which is attached by two set screws. The PSA upper and PSA free float rail were free of blemishes, rough edges, and was well assembled. I plan on giving the gas block set screws and rail attachments a tab of loctite. There is evidence in the chamber that the upper was test fired as indicated in the product description. Despite the 18” heavy barrel & 15” rail overall I was not disappointed in the weight, and it has a comfortable feel to it. I had patiently waited for the item to restock and it was worth the wait. It sells out fast. Overall without having fired any rounds through it I’m very impressed. This upper can compete with any similar product on the market for substantially less cost.
User submitted image
User submitted image
June 14, 2018
Great quality, affordable.
Using PSA Magpul CTR lower and Premium Nitride PSA BCG. Not precision fit, but no rattling. Great quality throughout. No failures, good quality, inexpensive, buy it.
June 7, 2018
5 months ago
PSA 18'' CHF barrel
All I can say is "WOWWY WOW WOW!" If polygamy was legal this upper would get you a solid dozen babes to marry muy rapido mi amigos. Shoots great, gets 1-1.25 MOA. Looks good, feels good, it is good. As a buddy of mine has said for years, "Training comes second only to looking good." THIS RIFLE UPPER WILL MAKE YOU LOOK GOOD! IT EVEN SMELLS GOODS! TRUMP 2020, G-D BLESS AMERICA, G-D SAVE THE REPUBLIC! I recommend using Lucas Extreme Duty gun oil to lubricate the BCG, because I preach the truth brothers and sisters. CAN I GET AN AMEN? THANK YOU
May 10, 2018
5 months ago
Thanks Palmetto!
Shipping was fast,good quality upper,but they sell fast!
May 9, 2018
5 months ago
Soooo Nice
One of many PSA uppers I have. PSA you guys got it together!
Never been disappointed yet. Keep it up, some of us still care about the 2nd Amendment.....
May 8, 2018
5 months ago
the best there is
This is perfect. It works flawlessly. I'm very happy with it.
May 7, 2018
5 months ago
Great Product!!!!!!👍🏻👍🏻👍🏻
April 24, 2018
6 months ago
Looks nice not Rifle length gas.
I am returning this upper unused even though it looks like it would make a nice firearm. For me the problem is that even though the description says it has a rifle length gas system it is really a mid length gas upper. Now that I know the description is wrong the fact that the upper is mid length is evident on examination of the picture as well. Look at the gas block position to see what I mean.

I was looking for an upper I could use to switch parts with on an 18" Wylde (rifle length gas) upper with a Magpul hand guard I also bought from Palmetto. I wanted to test accuracy with a standard hand guard then a free floated one. With the different length gas systems the hand guards won't be interchangeable. In theory my stainless Wylde barrel should be capable of better accuracy than a chrome plated 5.56 NATO barrel. I was planning to probably leave the Wylde free floated and the CHF barrel mounted with the traditional hand guard after I tested how the various combinations of parts worked.

This upper has Palmetto's top tier CHF barrel so it should be a great choice for those who don't want to change things around the way I do. My Wylde upper sometimes short cycles weak .223 ammo (i.e. Wolf) because the short dwell time of the rifle length gas system combined with an 18" barrel makes it slightly under gassed. This setup (18" mid gas) should work better with all different types of ammo for those who want a bulletproof (ha!) upper.

I have bought several uppers from Palmetto and they have all been well assembled and function great. Palmetto now seems to be so busy that they may be lacking a little in the customer service department (based on their non-response to my emails) but their product seems to be top quality especially their cold hammer forged barrel products. I bought headspace gages because the bolts aren't matched with the uppers but every upper and bolt I had assembled have checked out as having proper headspace. You can buy with confidence just be aware of what you are buying.
December 31, 2016

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