14.7" Mid-length lightweight pinned and welded upper

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PSA 14.7" Mid-length CHF 5.56 NATO 1:7 13.5" Lightweight M-Lok Pinned & Welded - No BCG or CH - 5165450410

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Regular Price: $ 579.99

Special Price $ 349.99

Quick Overview

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WARNING: This product can expose you to the chemical lead, which is known to the State of California to cause cancer and reproductive harm. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).

SKU: 5165450410
UPC: 5165450410
MFR#: 5165450140

Barrel Length: 14.7"
Gas System: Mid-length
Barrel Profile: Lightweight
Barrel Steel: Cold Hammer Forged Chrome Moly Vanadium
Barrel Finish: Phosphate
Chrome Lining: Yes, bore and chamber
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 Style
Receiver Material: Forged 7075 T6
Receiver Type: M4
Hand guard Type: PSA 13.5" Lightweight M-lok Rail
Bolt Carrier Group Included: No
Bolt Steel: N/A
Bolt Carrier Profile: N/A
Charging Handle included: No 
Overall Length: 23.2"
Weight as configured: 3 lbs

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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 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. The special A2 light profile barrel allows for better balance and portability over the standard A2 profile and is Mil-spec phosphate coated. Barrel is High Pressure tested, and Magnetic Particle inspected, to ensure quality and dependability, and is finished off with a PSA 13.5" Lightweight M-lok Rail, .750" low-profile gas block, and a pinned and welded A2 flash hider. The pinning and welding is makes the flash hider a permanent part of the barrel which brings it to the legal length.

Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized black for durability. Featuring machined T marks, and a mil-spec finish. These uppers are made for us right here in the USA by a mil-spec manufacturer.

SKU: 5165450410
SKU 5165450410
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 5165450410

Questions and Answers

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Browse 19 questions Browse 19 questions and 32 answers
Why does the barrel extension have 4 dimples on the left side? You can see them if you remove the bcg. Anyone have information on these? Pretty strange.
Shotgun on Jan 31, 2019
Is the barrel dempled for the screws on the gas block ?
Mark G on Feb 17, 2019
So do I have to use this with a pistol lower or can I use a rifle lower? (I want to avoid the SBR thing if possible)
Rob Y on Jan 23, 2019
BEST ANSWER: It says pinned and welded flash hider. That's done to bring the legal length of the barrel up to 16 inches, in order to avoid nfa.
Could someone take a picture of the FN mark on the barrel and post it here? thanks.
libarrel on Jan 3, 2019
BEST ANSWER: I posted a couple pics, very hard to do since its under the handguard.
Would this be considered a heavy barrel (for Maryland compliance)?
Stephen M on Dec 28, 2018
BEST ANSWER: No it says right in the description this is a lightweight profile barrel. Actually it is like a lightweight version of the A2 profile.
Can you change out the handguard with a different one?
Georgie on Dec 31, 2018
BEST ANSWER: If you want an upper with a different handguard... then go find an upper that already has the handguard that you want already installed. Or buy a stripped upper and all the parts you want. For Pete's SAKE!!!
Can you ship an upper like this to California?
C S on Dec 27, 2018
BEST ANSWER: Consult a lawyer or the CA gubmint. Don't take legal advice from random internet commenters.
Is this barrel available by itself?
Tony A on Jan 23, 2019
who makes this rail? it looks exactly like the Midwest Industries combat rail. arw these rails midwest ind?
Jamin S on Dec 27, 2018
BEST ANSWER: Mine says midwest industries and I love it. Super light and great for barrel cooling and balance
What's pinned and welded?
Jimmy on Feb 3, 2019
BEST ANSWER: The A2 flash hider is pinned and welded to the 14.7" barrel to make the legal length 16.1" so you don't need an SBR tax stamp. If you don't care about changing the flash hider, this is the way to go. It works, and it is a really nice barrel (and upper). Love mine!
Is the gas block pinned?
John C on Apr 12, 2019
BEST ANSWER: They use a low-profile gas block, secured by two screws on the bottom. The flash hider (FH) is pinned to the barrel, so it cannot be easily removed. This 14.7" upper is excellent in all regards, workmanship, solid feel, and surprisingly light, fit perfectly to my PSA lower, no play at all. I'm happy with this upper and want to buy another soon.
Can I attach a magpul angled grip to this?
Steve on Jan 22, 2019
BEST ANSWER: You would need to attach an M lock picatinny rail peice or use a Angled foregrip thatvis M lock compatible.
Are the srews that hold the gas block to the barrel dimpled into the barrel ?
Mark G on Feb 16, 2019
BEST ANSWER: No, they are NOT Mark. It is secured with two set screws on the bottom of the gas block. The barrel is NOT dimpled either. But the set screws are correct, in that they have the tips that act as a type of crush washer when they are tightened. So if you remove them to remove the gas block and then reinstall the block, you should technically use to new set screws designed to crush on the tip when tightened back down on to the barrel.
Is the handguard the same as the one pictured, partial rail on top or full rail?
Howard S on Jan 24, 2019
BEST ANSWER: As pictured. Full rail is item 77932796
What is the difference between this one the other 14.7” lightweight model 77932796?
John W on Jan 15, 2019
BEST ANSWER: The handguard rail. Look closely at them. One has a rail all the way down, this one is lighter weight.
Are the screws that are on the gas block dimpled into the barrel ?
Mark G on Feb 16, 2019
Is the gas block pinned?
Anthony R on Apr 14, 2019
BEST ANSWER: Anthony: No, the gas block is NOT pinned. It has two hex head set screws. The barrel is NOT dimpled either.

Only the flash hider is pinned and welded in place, to keep the barrel length legal.

The barrel DOES have the Fabrique Nationale Herstal marking.
Does anyone know is the gas port milspec, or oversized?
Brett on Feb 16, 2019
How often are these restocked? I'd like to buy one ASAP.
Cole B on Feb 14, 2019


4.9 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
First visual impressions feel great
I looked in the barrel, great shiny coating, blew air threw the gas port, great, very light weight, weld is precise enough if you want to change muzzle device, keeping mines default, like the way it looked from the beginning, hand guard does have sharper edges on horizontal position, makes the grip feel good, fn labeled hp mp 1 n 7 can’t wait to shoot this smooth gas system. Here’s some photos
User submitted image
User submitted image
User submitted image
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June 11, 2019
This build performed just as it was supposed to. Ran a couple hundred rounds through it without any hiccups. Look to PSA for my next build
I would recommend this upper. Didn't have a single flaw
June 10, 2019
2 months ago
Buy it!
Shoots sub moa groups with ease. This is an actual fn barrel for those who were wondering. I wouldn't hesitate to buy one again.
This barrel is awesome. Shooting sub moa groups and ringing a 4" plate at 300 yards! Buy it now!
This barrel is awesome. Shooting sub moa groups and ringing a 4" plate at 300 yards! Buy it now!
June 10, 2019
2 months ago
Good upper
I added high heat red permatex on gas block screws when it arrived, blue loctite on handguard screws. Installed a palmetto premium BCG.Used it in a training training class and it performed well. No malfunctions with several hundred rounds fired.
June 6, 2019
1 month ago
Balanced and great handling with an FN barrel
This upper will be a joy to use. Very easy to maneuver and great balance. You can’t get a better barrel. Everything was aligned correctly and torqued. I still went ahead and put lock tight on the hand guard retaining screws and the gas block screws. The pin and weld on the muzzle makes it legal so don’t mess with it. You will be surprised at how accurate and fast handling it is. A correctly machined gas block with two set screws that are properly torqued will not give you any trouble. There is no such thing as a bomb proof rifle or a bomb proof person that carries it. Don’t read to many “expert” internet opinions. You will be happy and PSA will stand behind it.
May 30, 2019
2 months ago
Great compact and lightweight rifle
Finally got this upper mated to an Anderson lower I built. Fit is excellent, no wobble and not to tight. Function has been flawless through about 200 rounds. Also fits on my Rock River lower nicely. Accuracy is good. 3-4” at 100 yards with a Holosun reflex sight and milspec ammo with a milspec trigger. Nice and light compact rifle. Very pleased with it. The hand guard is more robust than I expected for a lightweight but I really appreciate the strength and rigidity.
User submitted image
Added Mar 15, 2019
March 15, 2019
5 months ago
Excellent quality
As usual, outstanding quality at an excellent price. PSA'S CHF uppers are excellent quality and due to the chrome lining, typically shoot better after a hundred rounds or so, these uppers are my go to product and I've never been disappointed.
March 1, 2019
5 months ago
Excellent quality
As usual, outstanding quality at an excellent price. PSA'S CHF uppers are excellent quality and due to the chrome lining, typically shoot better after a hundred rounds or so, these uppers are my go to product and I've never been disappointed.
March 1, 2019
5 months ago
Been wanting an upper with a FN CHF machine gun barrel. This was well worth every penny on it
February 20, 2019
4 months ago
Awesome barrel and handguard!
Someone asked for pics of FN logo, hard to see as its under the hand guard but I snapped some for others who are curious. It says "(FN) HF MP 5.56 NATO 1/7"
FN barrel
FN logo
January 30, 2019

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