m4 carbine upper receiver

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PSA 16" M4 Carbine 1:7 Nitride 13.5" Lightweight M-Lok Freedom Upper w/ MBUS Sight Set - No BCG/CH

In stock

Regular Price: $ 429.99

Special Price $ 259.99

Quick Overview

free shipping Free Shipping applies to this item only and not the entire order.

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: 516444706
UPC: 516444706
MFR#: 516444706
  • Barrel Length: 16"
  • Gas System: Carbine-length 
  • Barrel Profile: M4
  • Barrel Steel: Chrome-Moly Vanadium
  • Barrel Finish: Melonite
  • Chrome Lining: None
  • Muzzle Thread: 1/2-28
  • Chamber: 5.56 NATO
  • 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
  • Hand guard Type: PSA 13.5" M-Lok Lightweight Rail
  • Bolt Carrier Group Included: No
  • Bolt Steel: N/A
  • Bolt Carrier Profile: N/A
  • Charging Handle included: No
  • Overall Length: 24.5"

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Barrel: 16" barrel length Chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a carbine-length gas system. The M4 profile barrel is finished with Melonite. Barrel is finished off with an .750" diameter low-profile gas block, PSA 13.5" 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 M4 feedramp cuts,  these upper upper receivers are made for us right here in the USA.

Includes:  Magpul® MBUS Sight Set, Black 

BCG & Charging Handle Not Included.

SKU: 516444706
SKU 516444706
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: 516444706

Questions and Answers

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Browse 9 questions Browse 9 questions and 22 answers
Does anyone know if the barrel is 4150 steel ?
Mark R on Jul 10, 2018
BEST ANSWER: read the description. It says Barrel Steel: Chrome-Moly Vanadium. This type of steel is a hard, strong steel that comes in several forms including 4140 and 4150. 4150 CMV is known for being used in the United States military,.
What material are the low profile gas blocks made of?
Michael I on Dec 6, 2018
Are the sights removable?
Nick P on Apr 25, 2018
BEST ANSWER: Yes. Both the front and back sights can be removed with either a flathead screwdriver or a hex wrench.
Can the flash hider be removed?
David F on Apr 29, 2018
BEST ANSWER: Absolutely! It’s a standard threaded barrel.
Hand guard is removable right?
First L on Nov 20, 2018
BEST ANSWER: Yep, with the right tools. They don't remove like your standard USGI handguards with the delta ring but you can remove them with tools, yes.
Will this fit on an Anderson lower?
John O on Jun 21, 2018
BEST ANSWER: yes it will I have it on one now works great had it on a areo precision lower very nice
Will this barrel fit on a Bushmaster QRC lower?
Clint T on Nov 27, 2018
BEST ANSWER: AR-15 platforms are all built on mil-spec lowers unlike the AR-10. As long as it’s a mil spec lower you’re good to go.
Is this upper mil-spec?
George A on May 5, 2019
BEST ANSWER: Yes it is. Bought one a year ago and still running rounds. At least a couple thousand so far. Good price for a good barrel
Is this a ptac upper?
Gabriel B on Apr 18, 2018
BEST ANSWER: This is a PSA upper. All PTAC uppers will say so in the title and description.


4.7 / 5.0
14 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
First ar build upper wasnt a bust
The upper went on my first ar build. I have only put 500 rounds through it but still have seen no issues with it.
User submitted image
Added Jun 25, 2019
June 25, 2019
2 months ago
Solid, Palmetto, just solid.
Really really love how this upper looks on my gun. It’s sleek, lightweight, and fits well with the DPMS lower I put it on. Palmetto got it to me in a timely manner with great packaging and some cool stickers. I’ve put roughly 1000 rounds through it with solid accuracy and haven’t had one single problem. No failures to eject, no double feeds, nothing. Think looks and works like a dream. Nothing but praise from me.
Looks good, works great.
Looks good, works great.
March 26, 2019
5 months ago
Good for the price I got it at
Good for the price. I am happy with it.
November 2, 2018
10 months ago
Great product works well, no problems.
For the price it is a good deal. I would buy it again.
User submitted image
User submitted image
October 26, 2018
10 months ago
Great product
Great quality and great product.
October 21, 2018
10 months ago
PSA AR-15 16" Carbine 1:7 Upper
Got lucky with this upper. Fit and finish is perfect.
October 19, 2018
1 year ago
good value
I used these for two utility builds, they were both correctly assembled using good components, the completed rifles are reliable and deliver expected accuracy. If the barrels were chrome lined I would rate five stars. good overall value.
July 18, 2018
1 year ago
Well put together
Really well put together. Nothing out of alignment.
Functioned flawlessly. Only have ~250 rds of various factory ammo through it.
Finish is very nice. Deep almost glossy black.

No slop between it and my Rock River lower.; paired with Palmetto premium BCG.

Great value
April 27, 2018
1 year ago
Best value upper ive seen works flawlessly
Awesome upper no issues just buy it. Best quality and value for an upper with this rail and barrell. Throw in a psa bcg and charging handle and your good to go. Rock on PSA
July 20, 2017
Pretty good first impression
Just received my item 516444706 barreled upper assy. I love the MLok hand guard. I love the nitride barrel was very clean inside the bore. The upper receiver fit my Anderson Mfg lower receiver perfectly. The outside of the gas block appeared rusty underneath the hand guard. I removed the hand guard to get a closer look - the gas block appeared old a little scratched possibly used. I wiped the rust/powder crud off the gas block with an oiled cloth and it looked ok. The gas tube roll pin was a bit smashed but inserted fully. The upper assy is very lightweight. Overall I'm generally happy with upper assy and looking forward to taking it to the range. I added my own BCG and charging handle. Its a pretty good deal at $249 including the Magpul sights.
July 10, 2017

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