16" mid-length barreled upper assembly

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PSA 16" Mid-length 5.56 NATO 1:7 Nitride Freedom Upper - with BCG and CH - 507281


Quick Overview

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SKU: 507281
UPC: 507281
MFR#: 507281

16" Barrel length
4150V Chrome Moly Vanadium Steel
5.56 Nato Chamber
Melonite 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 Mid-length gas system. The A2-style profile barrel is Melonite treated for accuracy and durability. Barrel is finished off with an .750" diameter F-marked front sight base with sling swivel, standard handguards and an A2 flash hider.

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

Bolt Carrier Group: For AR15 and M16 rifles and carbines. Bolt is made of shot-peened, Mil-spec Carpenter 158® steel. Gas key is secured with grade 8 fasteners and staked. Bolt carrier is parkerized outside and chrome lined inside. Includes Charging Handle.


SKU: 507281
SKU 507281
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: 507281

Questions and Answers

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Browse 38 questions Browse 38 questions and 122 answers
Wouldn't the barrel profile be considered a heavy barrel for this upper? (Maryland compliant question)
Hayden O on Apr 21, 2018
yes I live in the great state of Maryland and its compliant with our gun laws for heavy barreled AR's. Just had one delivered last week.
I'm waiting for this to come in. However I'd like to buy a quad rail in stead for the plastic, what drop in quad rail will fit this upper?
Brinks on Apr 26, 2018
BEST ANSWER: knights armament and midwest industries both offer drop-in replacements.
legal In California because of shorter than 16" barrel?
Jason T on Oct 5, 2018
BEST ANSWER: The barrel measures 16" in all states.
Does the barrel profile stay the same diameter throughout, or is it thinner under the handguards ?
Arthur F on Aug 5, 2018
BEST ANSWER: I have several of these. The A2 profile should be the same under the handguard. The government cut is a smaller diameter under the guards. It is also lighter for field carry. Mine are the same .750 under the guard. HBAR is heavier under the guard.
Us this upper compatible with the .223 rounds?
Chris on Jul 6, 2018
BEST ANSWER: Yes. Any 5.56 NATO barrel will be compatible with .223. Do not use 5.56 NATO with a .223 barrel, however.
Could this upper take a different hand guard?
Chris on Jul 7, 2018
BEST ANSWER: While mid-length handguards (8.5") are not as prevalent as carbine length (7") equivalents, there is nothing unusual about this setup that would prevent a drop-in replacement. There are also a few handguards that call for the triangular hand guard retainer - those will not work here.

If you want to free float it, you'll just need proper tools to remove the delta ring, barrel nut and front sight block.
Can you shoot 223 and 556?
Jimg1215 on Dec 28, 2018
BEST ANSWER: Yes you can. You can shot .223 in a weapon chambered for 5.56. BUT should not shoot 5.56 in a .223 weapon.
Is this a wylde barrel? Or 5.56 only?
Navor G on Dec 28, 2018
BEST ANSWER: This barrel is marked 5.56. The accuracy using standard .223 ammo isn't that of what a wylde barrel would be but it will still fire .223 or 5.56.
Does it come with firing pin ?
Thomas T on Feb 1, 2019
BEST ANSWER: yes...with BCG means it has a bolt carrier group so firing pin is in bolt for sure with these...ch means charging handle...so this has both just snap onto any AR lower and you are ready to go
Can this plastic hand guard and front site be removed and replaced with a quadrail and alternate site? or is the front site part of the gas block? Thank you
Rockie R on Jan 4, 2019
BEST ANSWER: I didnt do anything to it i wanted to keep the regular set up but with the right know how i believe you can change it out.
With this upper; what else do I need for a build? This will be my first build.
Michael E on Jan 3, 2019
BEST ANSWER: A complete lower receiver, rear sight, magazines, and ammunition. I would caution you if you buy an upper without a BCG and charging handle, you should also purchase go/no-go gauges to ensure proper head-spacing. Since this upper comes with the BCG and CH, Palmetto has already checked head-spacing.
Will a carbine build kit work with this.?
Gary R on Dec 29, 2018
BEST ANSWER: Yes, it will work with just about all AR-15 lowers. This is a very nice upper and I could not be happier with it. It is a mid-length which means it cycles a fraction slower then the carbine length upper. You will never be able to notice the difference in cycle time and it is somewhat easier on the lower.
One person said triangle cap, other said round cap for hand guard. Which one does it have ?
clay p on Aug 21, 2018
BEST ANSWER: I purchased 2 of these and they both have triangle caps.
Does this have built in sights or do you need to buy optics in addition?
Kenny A on Nov 23, 2018
BEST ANSWER: Enter an answer to this question.I chose the A2 carry handle (milspec). Holds zero, easy to set up, and looks great. I would have gotten one from PSA but they were out.
I got one from UTG. Still milspeck (copper aluminum foundry mark (square).
round or triangle front handguard retaining cap?
EspoMan E on Jun 15, 2018
BEST ANSWER: It’s a triangle retaining cap.
Will This Upper fit my PSA AR-15 Complete Classic Lower - No Magazine - 7244 ?
MICHAEL R on Feb 10, 2019
PSA 16
PSA 16" Mid-length 5.56 NATO 1:7 Nitride Freedom Upper - with BCG and CH - 507281
PSA AR-15 Complete Classic Lower - No Magazine - 7244
PSA AR-15 Complete Classic Lower - No Magazine - 7244
BEST ANSWER: The upper will fit that lower just fine. Mine went together with zero issues. Hope this helps.
Why does this look like the m4 upper is this the wrong picture for the upper you get? 🤔
Zach J on Dec 27, 2018
BEST ANSWER: actually it's not the correct picture.this barrel will be cut down behind the flash suppressor about an inch,unlike the one pictured
What color is the hand guard ?
Thad007 on Nov 19, 2018
BEST ANSWER: Mine was Black.
I bought this upper and have the psa classic lower an it fits really loose and lines do not match up does anybody else have same preoblem?
Zach J on Jan 13, 2019
BEST ANSWER: I purchased 2 of the uppers that I was going to use with 2 80% lowers that I had milled out. one of them seemed to be out of line, and I could not pull the bolt carrier back. it seemed to be hitting something. I tried another lower and it worked fine. my problem was either the lower or the upper. try your upper on another lower to see if that might correct the problem.
Is the BCG full auto?
Robert W on Dec 27, 2018
BEST ANSWER: Yes it is. It also states that in the description. M16 Bolt Carrier Group.
How accurate is this upper with .223 ammo?
Kyle R on Nov 14, 2018
BEST ANSWER: I'm able to achieve about 1 MOA with 55gr fmj factory ammo with this upper. With heavier match ammo, it should be even better.
Can I put a 10inch quad rail on this?
Ade B on Feb 6, 2019
BEST ANSWER: No.. not without doing some work.
PSA uses a triangular shape handguard end cap. Most quad rails uses a round handguard endcap. It can be done after changing out to round endcap
What size gas port does this have?
nater on Jan 17, 2019
Anybody know where I can get a better hand guard for this?
Zach J on Jan 13, 2019
BEST ANSWER: I put a magpul hand guard on it. Just make sure you get one that is a mid length gas system length. Any hand guard that is compatible with the D ring attachment will work. If you don’t have the wrench to remove it is a two person job.
Does this upper front sight come zeroed?
AlexanderG on Nov 30, 2018
BEST ANSWER: The front sight was almost in perfect alignment with the carry handle rear sight that I installed on upper. The windage was perfect and elevation was just 1'' over the bullseye.
Can u put a fore grip on this?
Jon F on Jan 20, 2019
BEST ANSWER: A Magpul 426 Mid-Length Handguard will work on this upper without modifications.
ar will shoot 5.56 with no issues but will not cycle the .223 but will shoot them. the next rd wont reload but will trip the trigger like it wants to fire. new upper maybe 10 rds of .223 with cycle issues 2 rds of 5.56 both no issues. what could that be?
Justin R on Jan 4, 2019
BEST ANSWER: I believe most PSA AR's stipulate whether they are 223 or 556. I believe it has to do with internals and or the gas block setup. The hotter loads of the 556 are needed to cycle properly. And then again I could be talking out my ...
Does this upper receiver have T-marks on the picatinny rail?
Yakkha Y on Jan 3, 2019
BEST ANSWER: No. There are no T-marks on this receiver.
Is the flash hider pinned or will I be able to easily switch it out?
Joker514 on Dec 31, 2018
BEST ANSWER: It was easy to switch out! Not pinned! I also changed out the rail/ forgrip! Piece of cake!


4.8 / 5.0
139 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
The best so far
I got 3 AR 15 and one AR 10 and love them all, I’m now giving AR 15s as house warming gifts if they move out of California pending a background check of course. I’m still looking for a 6.5 creedmore pretty soon
AR 10. Can’t find the AR 15 pictures
AR 10. Can’t find the AR 15 pictures
February 21, 2019
2 months ago
Very nice upper from PSA.
February 21, 2019
2 months ago
Beginners welcome!
First time buying uppers and lowers or even an AR. Very pleasant experience just buy this and a complete lower and it’s literally pulling 2 pins out slapping upper on lower push pins back in and you’re spitting bullets. Will absolutely be buying from palmetto again
February 18, 2019
1 month ago
Great quality at a great price
Much better quality then I expected due to the low cost. I will definitely be buying more uppers for my builds
February 17, 2019
1 month ago
I’m really impressed with how it works I love it
February 17, 2019
1 month ago
Great buy
Very fast shipping. No problems with putting together. Was pretty much sighted in . Great Buy!!!!
February 10, 2019
1 month ago
Abso-fn'-lutely top notch!
We fn' love it! That barrel is wicked accurate. Reliable! Outstanding fn' quality all around. PSA fn' rocks!
February 10, 2019
1 month ago
Can’t go wrong with this buy.
Final part to my first build. Everything arrived completed. Perfect fit to my Anderson Lower Receiver. Added a handle sight, quick clean and went off to range. Went through 3 boxes of American Eagle 5.56 and no FTE or FTF. Very acurrate to finish it off.
Will complete anyone’s build.
Will complete anyone’s build.
February 7, 2019
1 month ago
Great Upper Combo!
Great fit and finish, accurate and reliable. I was looking for a back up upper for my longer range setup and this was a great buy. Just cleaned installed a red dot and it was ready to go.
Fast shipping too, would highly recommend!
February 4, 2019
1 month ago
Excellent. Fast shipping. Mates right up to PSA lower.
February 3, 2019
1 month ago

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