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

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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 $ 299.99

Quick Overview

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"

Add To:

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? No
SKU: 516444706

Questions and Answers

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Browse 5 questions Browse 5 questions and 16 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,.
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.
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
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.


4.6 / 5.0
8 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
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
8 months 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
7 months 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
Great product!
Got this upper for a great deal. This upper is really lightweight! I liked it was chambered for 5.56 1/7 twist carbine length gas tube. MBUS Sights was also a plus. The 13.5" M-Lok upper has plenty of room for accessories. The shipping was fast. Great product right off the shelf. I put 200 rounds through and no problems to mention.
April 26, 2017
Great upper
I got this upper within 2 days. I do live in the same city (Columbia) as PSA. This upper is super light and the bonus of the MBUS & M-Lok makes it a know brainer. I slowly pieced this AR with parts from PSA and now it is almost complete. Things I am looking to add are sling hand stop and red dot. Thanks PSA!!!
March 8, 2017
Amazing Product for an amazing price!
I purchased 2 of these. Great quality for the price. I love the free floating rail and the fact that Palmetto included the MBUS sights. Honestly this set up alone is well over $500. Do yourself a favor and get this upper you won't be diavpointed.
February 8, 2017
Another winner!
Great lightweight upper. Zero issues from day 1. No issues doing 1 1/2" groups with cheap 55gr fmj using a 3-9x40 leupold. I'll be trying out some match 77gr just to see what it does. More than enough accuracy for the red dot setup it will be ran with.

Another winner from PSA.

January 30, 2017

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