lightweight 223 wylde barrel upper reciever

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PSA 18" Rifle Length .223 Wylde 1/7 Stainless Steel 15" Lightweight M-lok Upper With BCG, CH, & MBUS Sight Set - 516446673


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 (CA Health and Safety Code Section 25249.6).

SKU: 516446673
UPC: 516446673
MFR#: 516446673

Barrel Length: 18"
Gas System: Rifle-length
Barrel Profile: A2 Style
Barrel Steel: 416R Stainless Steel
Barrel Finish: Stainless
Chrome Lining: None
Muzzle Thread: 1/2-28
Chamber: 223 Wylde
Twist Rate: 1:7
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 15" M-Lok Lightweight Rail 
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Sights: Magpul MBUS Sight Set, Black
Overall Length: 26.5"

Add To:

Barrel: 416R stainless steel barrel.  Chambered in 223 Wylde, with a 1:7 twist rate, M4 barrel extension, and a rifle-length gas system. Barrel is finished off with a PSA 15" Lightweight M-Lok free float rail, .750" low-profile gas block, and an A2-style flash hider.

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

Bolt: Full-auto profile bolt carrier group. Milspec Carpenter No. 158® steel bolt, Shot Peened, High pressure tested, Mag particle inspected, Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked per Mil-Spec.  8620 steel M-16 profile carrier is chrome lined and phosphate coated.

Included:  Magpul MBUS Sight Set, Black

SKU: 516446673
SKU 516446673
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: 516446673

Questions and Answers

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Browse 25 questions Browse 25 questions and 67 answers
Are completed uppers sold and shipped together with a bolt carrier group headspaced with each other?
Tom B on Apr 20, 2018
When will any 18in Wylde be back in stock?
Cellis on May 8, 2018
Is this an FN barrel or one PSA makes in house?
SouthernGuns on Apr 20, 2018
BEST ANSWER: This barrel is produced by PSA in house. FN barrels will specify that they are made by FN and are their proprietary "Machine Gun Steel".
Will this .223 complete upper fit my PSA RA10 .308 Lower purchased recently from PSA?? Thanks folks Happy Holiday
James S on May 24, 2018
BEST ANSWER: No! Not even with hammer and duct tape. Get a pa15 lower.
Does this have a nickel boron bcg?
Eric M on Dec 25, 2018
BEST ANSWER: No it comes with a standard bolt carrier. Still reliable though, haven't had a malfunction yet and I've shot 2,000 rounds.
Will 556 works with this upper or just 223? please
Gyogyo E on Dec 10, 2018
BEST ANSWER: Yupp! Anything chambered for .223 Wylde can also handle the pressure of a 5.56. I bought this for my last rifle build and it's a trooper. Dirty ammo, expensive ammo, .223, 5.56 and everything else that accompanies this chambering it runs it like a dream and still maintains proper accuracy.
Can this upper run 5.56 also?
Chris on May 23, 2018
What complete lower will work with this upper?
Phil W on May 1, 2018

I recently purchased an identical upper for a friend and he used a standard mil. spec lower to complete his rifle. So I would say as long as your lower is mil. spec. it should work with no problems. By the way my friend was very satisfied with the look and the construction.

Hope this helps.
Will I have to change out my carbine buffer and spring? I have a PSA MOE complete lower.
Lee B on Jun 10, 2019
BEST ANSWER: I built mine with a PSA MOE lower kit with my own stripped lower. No cycling issues so far and I have about 1000 rounds through it.
Will it fire steel cased ammo reliably?
George Q on May 27, 2018
BEST ANSWER: Mine fires it reliably. I don't recommend using steel case if you can help it, though. It can prematurely wear the weapon and cost you more down the road. But, if that's all you can manage, I get it. I've ran approximately 2000 rounds of steel case through mine and it doesn't appear to have roughed her up too much.
can you put a better flash unit on it ?
don w on May 1, 2019
BEST ANSWER: Yes. Standard threads. Lots of different flash hiders/breaks available for the barrel.
Will lower 7780991 work with this upper and are they the same color?
Alex a on Apr 17, 2019
BEST ANSWER: Yes the 7780991 lower will work with the 516446673 upper and , they are the same color.
Will this fit a Bushmaster M4 Lower?
JoeRoch on Feb 14, 2019
BEST ANSWER: As long as the Bushmaster is a standard M4 lower it should be fine. AR 15/M4 lowers are very standard from what I remember.
The description is listed as an 18" bbl with 15" hand guard but in the pictures the bbl does not seem that much longer. Typo or old eyes on my side?
Michael C on May 25, 2018
BEST ANSWER: Hey Michael. C., I know this is acouple months old now but, You are counting the "Muzzle Device: A2 Flash Hider" in the looks of 18" are you?
Did you ever Buy this,... and How do you like it?
Peace Jeff
I have a Remington sport ar15 well my lower work well with that upper?
Ron Y on Jun 15, 2019
BEST ANSWER: Put mine on a standard mil spec lower. No problems, shoots and functions really well.
Is there a QD mount built into the rail?
Zack H on Jan 8, 2019
BEST ANSWER: There is not a QD built into the rail. You will need to install one yourself.
Is there any issues putting this rifle lenght gas system on a carbine buffer lower?
Rob R on Dec 22, 2018
BEST ANSWER: you can use any lower no problems. Have been running mine on standard carbine lower with standars buffer
Is there a lower receiver with a two stage trigger that will fit this upper receiver?
Christopher S on Nov 26, 2018
BEST ANSWER: Yes there is.
Does this come with a charging handle?
Daniel M on Nov 20, 2018
BEST ANSWER: Yes it does.
Are the sights plastic or metal?
Naylor on Oct 17, 2018
BEST ANSWER: The sights are Polymer ‘plastic’ but work excellently.
What ammo would be recommended when target shooting/shooting a lot of rounds?
Hunter W on Jun 7, 2018
BEST ANSWER: Any quality brass cased 55gr or 62gr FMJ should work fine with this upper.
is the top rail picatinny or weaver? the mbus sights I received will not fit that far back on mine. it looks to be two different rail systems on the top
Kyle R on Jan 8, 2019
Is this assembly legal to ship to california?
Matthew E on Aug 10, 2018
is this set up ,mainly type of barrel,compliant in md?
chris h on Jul 4, 2018


4.8 / 5.0
77 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Fit perfectly with my Anderson lower and shoots under MOA with quality ammunition. My first AR. Exceeded expectations.
June 16, 2019
3 months ago
AR-15 upper
I bought this to put with a PSA lower i had previously built and gave it to my son for his first AR. He topped it with a Nikon VX-R Patrol and loves the way it shoots.
June 12, 2019
3 months ago
ty psa its a great shooter so far, cant wait to get a pistol upper for home deference..
May 26, 2019
3 months ago
Upper review
I have purchased similar to this and of course this one. I have found that the complete guns after assembly are not below any standard I have lived with most of my life. They say you get what you pay for, however I believe that you can get great quality for a cheaper price and in some instances this is one of them.
May 21, 2019
1 year ago
Great Deal-Excellent Performance
I bought this for a varmit rifle. Function was flawless. At break-in out of the 4 different factory loads tried so far it seems to like Wolf Gold 55gr. It shot about 1.5-2”. Looking forward to some shooting some heavier bullets.
March 10, 2019
1 year ago
Very nice upper. Shipping was very fast. I was not impressed the first time I tried to shoot it, failures to feed and eject. I was trying .223 55gr I then tried 5.56 55gr a little better. I ordered some 5.56 62gr that worked great. After a few magazines of that the other two types of ammo worked good to, it is still difficult to charge but it is getting better. I have a carbine stock and I am wondering if a rifle stock would be better. The original issues is the reason for only four stars.
March 4, 2019
7 months ago
Great purchase would buy again
Great deal, well worth the money, fit and finish was perfect.
User submitted image
Added Feb 21, 2019
February 21, 2019
6 months ago
Great product at a great price
February 13, 2019
7 months ago
Absolutely no problems what’s so ever. Slapped I on my cmmg lower and worked flawlessly. Would buy again.
January 30, 2019
7 months ago
I purchased this upper in November 2018 and have been pleased with it so far. Ive only shot a few rounds with it, but open sights are hard for me to see. I will purchase a scope later. I would recommend this product.
January 28, 2019
7 months ago

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