16 inch ar-15 barreled upper assemblies

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PSA 16" Classic M4 Freedom Upper with BCG and Charging Handle


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WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).

SKU: 777781
UPC: 777781
MFR#: 777781

16" Barrel length
4150V Chrome Moly Vanadium Steel
5.56 Nato Chamber
Nitride Finish
1 in 7" twist rate
M4 Feed ramps
F-Marked Front sight post
A2 Flash Hider
Sling Loop
Standard Hand Guards
Forged Upper Receiver
M16 Bolt Carrier Group
Carpenter 158 Bolt
Charging Handle

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Barrel: Chrome-moly vanadium steel, chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a carbine-length gas system. This M4 profile barrel is nitride treated for accuracy and durability. The barrel is finished off with a .750" diameter F-marked front sight base with sling swivel, standard carbine handguards, and an A2 flash hider.

Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring M4 feed ramp cuts,  these upper receivers are made for us right here in the USA.

Bolt: Bolt is made of Mil-spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec.

SKU: 777781
SKU 777781
Brand Palmetto State Armory
Department Uppers
Daily Deal No
Daily Deal Expires No
Unit Price No
Youtube Video No
Free Shipping? No
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 777781

Questions and Answers

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Browse 77 questions Browse 77 questions and 245 answers
What are the differences between this and the Nitride uppers? Or this and the CHF uppers? Or is this just another Nitride upper?
NickKHecht on Oct 6, 2018
BEST ANSWER: Nitride parts are dunked in a vat of molten salt to harden them and make them corrosion resistant inside and out. This makes the barrel last much longer than an untreated steel barrel. The CHF uppers are Chrome plated. This also makes them last much longer and makes the chrome plated parts corrosion resistant. You must oil the outside, which is parkerized, to protect it. Chrome plated barrels also cost more than twice as much as nitrided ones.
Why advertising clearance It's out of stock?
Henry Q on Jun 21, 2018
BEST ANSWER: Keep checking the site.
Is the front sight removable?
Michael M on Jul 30, 2018
BEST ANSWER: The front sight post is also the gas block. So yes, but in order for the rifle to function you'll need a new gas block. Though, if you're asking this question it's best to leave it to a professional gunsmith.
This 5.56 only or will it handle.223?
Larry on Dec 18, 2018
BEST ANSWER: Any chamber/barrel marked 5.56 can generally run .223 with no issues. .223 marked chambers/barrels should not use 5.56, the pressure produced by the cartridge exceeds the pressure that the .223 chamber/barrels are rated for.
I have a 6.8 SPC, can I just buy this upper and convert to 5.56?
xrayjuan on Apr 29, 2018
BEST ANSWER: Yes you can.
Does the upper come with rear sight?
Wayne F on Apr 29, 2018
BEST ANSWER: No. It comes exactly as pictured
Is the barrel threaded?
William O on Dec 21, 2019
BEST ANSWER: at the end by the flash suppressor, yes it is
How long is the hand guard?
Ricross on Jul 4, 2018
BEST ANSWER: It is a mil spec carbine m4 handguard wich is 6.5 inches
Will the PSA Classic M4 Freedom upper work with the PSA AR-15 Complete Classic Lower - No Magazine - 7244 ?
Henry on Feb 21, 2019
PSA 16
PSA 16" Classic M4 Freedom Upper with BCG and Charging Handle
PSA AR-15 Complete Classic Lower - No Magazine - 7244
PSA AR-15 Complete Classic Lower - No Magazine - 7244
BEST ANSWER: Yep, plug and play.
Does anyone know if the gas block is pinned? Or is it only attached using screws?
Caleb H on Dec 13, 2019
BEST ANSWER: Yes, it is pinned, but not welded so if you want it removed a armorer can remove it.
What do I need to complete this?
Ajt02 on Dec 9, 2018
BEST ANSWER: It's a complete upper receiver. You will need a fully assembled lower receiver to make it a functioning rifle. You will also need some sort of optic to aim your rifle. At the minimum this would be a rear peep sight. The upper receiver already has a front post sight installed.
Does it come with T-Marks on the Upper Receiver ??
James S on Jul 23, 2018
BEST ANSWER: Yes, this upper comes with T-marks.
what is the attachment clip looking thing on the bottom of the front sight, not the strap ring, the other thing?
Sean P on Jan 18, 2019
BEST ANSWER: The only other attachment I can see on the bottom of the front sight is the bayonet mount.
Can the A2 flash hidder be unthreaded and removed ?
Alfaec S on Jan 27, 2019
BEST ANSWER: Yes the barrel is the legal length without the flash hider. The threads are standard for 5.55
If I have a complete AR15 lower, I can just put this on and it's ready to go?
Mike V on Feb 27, 2019
BEST ANSWER: No, you're going to need either a rear sight or optical sight. This upper does have a front sight.

Also, I don't recall if this product package came with a magazine, if not, you'll need a magazine or two. Or three. Personally, I would recommend at least ten.
Is this the same as ar15 upper?
Muneco on May 27, 2020
BEST ANSWER: It is completely compatible with an AR-15 upper, but is the carbine version (in the past, called CAR-15).With the military adoption of the M4 (M16 replacement) as the standard battlefield rifle, it is usually now just referred to as an M4 upper.
I have a lower w this upper do I need any other parts to complete my build?
Bobmaier on Sep 25, 2019
BEST ANSWER: If you have a “complete” lower all you’ll need is a mag and a rear sight to be complete. If your lower is stripped you’ll need lower parts kit, buffer tube, castle nut, end plate, buffer spring, buffer, butt stock.
Will this upper work with a complete anderson lower?
New build on Sep 27, 2019
BEST ANSWER: Yes it should. I have swapped mine between PSA, Anderson, BCA and probably a couple others. I haven't had a problem.
This item is Compatible with the PSA A.R. 15 classic lower am I right?
Keith S on Dec 10, 2018
BEST ANSWER: Yes, this item is definitely compatible with PSA AR15 classic lower.
Is it compatible with a Anderson Manufacturing multi- caliber lower?
Milton J on Sep 27, 2019
Will it fit a dpms lower?
Jonathon D on Feb 17, 2019
BEST ANSWER: Yes it is milspec. For my Anderson lower perfectly.

Round end cap or triangular?
Andrew K on Jan 25, 2019
BEST ANSWER: Round end cap
rear sights for this upper? what would be best fit with the front sights?
Mark G on Dec 11, 2019
BEST ANSWER: No sight included but there are so many good options both fixed and folding. I chose a Magpul mbus gen2...you can generally find them for under 40 online and they are great. They fold to allow better sight picture if you get a red dot or optic
Will this upper fit on a Stag 15 Tactical Lower?
Nicko on Dec 3, 2019
BEST ANSWER: Yes. If you have a stag15 lower receiver (the same as any AR-15 lower receiver) then yes it will fit. The only reason it would not fit is if you have a 308 upper. (I had to say that because some folks don’t know)
What else do i need to complete this upper for a working rifle?
Joe P on Dec 4, 2018
BEST ANSWER: If you have a complete lower and this upper, you will only need a rear sight (or red dot / scope) and you're ready to go.
Is the rail picatinny or weaver?
chris w on Feb 22, 2020
BEST ANSWER: It is a Picatinny rail. Therefore it will accept both Picatinny and Weaver accessories
rear site; can i use mbus rear site for this?
Brian B on Dec 2, 2019
BEST ANSWER: Of course!
Will this work on a semi-auto lower?
Gary H on Nov 9, 2019
BEST ANSWER: There is no difference between a semi-auto upper and a machine gun upper. The difference is in the bolt carrier. A full-auto carrier works in both types of rifles. A semi-auto only works in a semi-auto unless you don't want auto-fire in a machine gun. Most people prefer the heavier full-auto carrier as they think it gives more reliable service.
Can a vertical foregrip be easily attached to this handgaurd ?
Brian P on Oct 4, 2019
BEST ANSWER: If it’s the mil spec front grip then no
You’ll need to replace it with a magpul or some other type of M lok or key mod for the vertical grip to attach to it
If it’s a mil spec front grip then a magpul would be the easiest to replace it with IMO
Pull the delta ring back, pop out the old and pop in the new
Other than the different handguard and lack of rear MBUS how is this different than https://palmettostatearmory.com/psa-16-carbine-length-5-56-nato-1-7-m4-nitride-moe-upper-with-rear-mbus-bcg-ch.html ?

I notice one list “nitride” barrel treatment and the other lists “melonite”.
John N on Aug 28, 2019

The one you have linked comes with a rear sight, and a Magpul hanguard.

Best Regards,
PSA Customer Service


4.8 / 5.0
208 Reviews
5 Stars
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1 Star
Can't beat it...
Even with all the things going on in the world the delivery was fast, had no blems, completely satisfied.
User submitted image
Added May 27, 2020
May 27, 2020
This is the second one I have bought from them over the years. Everything is great. You can't beat the price and quality
Great product! Cheap price, but not cheap quality.
User submitted image
Added May 4, 2020
May 5, 2020
3 months ago
I trust this upper with my life. SOLID! G2G!
So far my PSA Freedom upper has a little over 700 rounds through it and was only cleaned once. Primarily shooting Wolf steel case like a BOSS! If you need a solid “go to war” rifle on a budget, go with the PSA Freedom Upper! Great quality for a unbeatable price! Will not regret it!
PSA Freedom Upper build!
PSA Freedom Upper speaks for its self!
May 4, 2020
8 months ago
Excellent upper.
Excellent upper, just snap it on and shoot. This is my second one from psa.
May 4, 2020
3 months ago
Made nice m16 clone
Works well functions gud and didnt break the bank
May 4, 2020
3 months ago
i have not had a chance to run any ammo through it ,but i am happy with it.
April 29, 2020
3 months ago
Quality at a low price
I had purchased similar uppers from a different site, they were not up to expectations, luckily I was able to return them. These uppers from PSA saved the day. I couldn't be more pleased. I won't hesitate to get my parts from PSA.
April 26, 2020
3 months ago
Very happy
I really like the m4 upper I bought, i just got finished adding a few more parts to it to change it up a lil bit. Thanks for the good deal on my upper
April 26, 2020
3 months ago
I have spent money on more expensive upper receivers and honestly don't see a difference.
Palmetto state is awesome.
April 26, 2020
3 months ago
cant find a better deal anywhere
I am very happy with this upper for the price you cant go wrong
April 23, 2020
3 months ago

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