M4 Carbine 5.56 AR Rifle Kit

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PSA 16" M4 Carbine 5.56 NATO 1:7 Nitride 13.5" Lightweight M-Lok MOE Freedom Rifle Kit with MBUS Sight Set - 516446228


Quick Overview

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: 516446228
UPC: 516446228
MFR#: 516446228
  • Barrel Length: 16"
  • Gas System: Carbine-length 
  • Barrel Profile: M4
  • Barrel Steel: 4150 Chrome-Moly Vanadium
  • Barrel Finish: Nitride
  • 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" Lightweight M-Lok Rail
  • Bolt Carrier Group Included: Yes
  • Bolt Steel: Carpenter 158
  • Bolt Carrier Profile: Full-auto
  • Charging Handle included: Yes
  • MBUS Sight Set, Black
  • Overall Length: 24.5"
  • Weight: 4.0 lbs

Add To:

Barrel: 16" length, 4150V Chrome Moly Vanadium steel , chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a Carbine-length gas system. The barrel is finished with with a .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.

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.

Lower Build Kit:  PSA MOE Lower Build Kit

Includes: Magpul MBUS Sight Set, Black 

SKU: 516446228
SKU 516446228
Department Uppers
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Unit Price N/A
Youtube Video No
Free Shipping? No
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 516446228

Questions and Answers

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Browse 4 questions Browse 4 questions and 14 answers
Is the only thing missing from this build kit the stripped lower?
Logan J on Jun 16, 2018
Is the buffer tube mil-spec?
Jay S on Aug 4, 2018
BEST ANSWER: Yes, the buffer tube in my rifle kit was Mil Spec
What is the difference between mid length gas sys. And carbine gas sys.?
JIM M on Jun 18, 2018
BEST ANSWER: Midlength is a little bit softer shooting since it has a few inches more of gas tube. The carbine is a bit harsher.
What weight buffer comes in this kit?
Jonathan D on Jan 28, 2019


4.8 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Not an Absolute perfect fit, but shot well
It was a little loose at first on the Aero Precision M4e1 lower, but the Aero's set screw had it all tightened up. It shot well on its first 120rds, no hiccups. Looks really nice, handguard feels great in hand.
Shown built on an Aero Precision M4e1 lower
Shown built on an Aero Precision M4e1 lower
January 31, 2019
11 months ago
Great kit , not a single issue with it, highly recommended
User submitted image
Added Jan 27, 2019
January 27, 2019
10 months ago
For my meme gun
Loving it so far! Need a bit more lubrication then my other AR but so far so good!
Dumpster defense
Dumpster defense
January 26, 2019
10 months ago
Just buy it!!!
I definitly recommend this product for your first build it's stylish and lightweight and seems to be quality made.
December 1, 2018
11 months ago
Great kit for the price
This kit was complete and the finish was very, very good. No nicks or mars and ran great once built. Thank you PSA!
October 14, 2018
1 year ago
Good upper and good parts
User submitted image
User submitted image
October 12, 2018
1 year ago
So far so good!
The kit came nicely packaged. Assembly was easy, the parts looked to be machined nicely, but the finish on them is easy to scratch. This is not a deal breaker for me. A gun's meant to be used and the blemishes give them character. I've put 300 Federal 5.56 rounds through it and so far I've had zero issues.
October 11, 2018
1 year ago
Good value build
Awesome value build. Attached it to an 80% lower I had finished earlier and it looks great. Has chewed through brass and steel ammo alike with no issues so far. This MLOK rail is a lot more slim and low profile than many I've seen and just looks good as well. Currently have the MLOK AFG on it and it makes for a great combination, the rail is slim enough I can wrap my thumb around the top of the rail while using the AFG for a really nice hold. It will smack steel targets at 100yds out with a red dot consistently which is all I need from it.
Added MLOK AFG snd VTAC sling. Great looking rifle, ready for an optic now.
Freshly assembled
October 4, 2018
1 year ago
Very nice kit for the price fit my ruger 5.56 lower perfectly
October 2, 2018
1 year ago
Phenomenal rifle kit
I was blown away by the quality of this rifle, for as much as I paid I expected so much less than what I actually got. This was my first AR-15 build and it was incredibly easy. I do have some experience with M4s but did not expect it to be as simple as it was. My only qualm is that the finish on the rifle has the tendency to scratch easily however, at the end of the day that doesn't affect its performance so I could not be more pleased.
PSA Freedom Rifle with Battlelink Minimalist stock and Anderson lower.
PSA Freedom Rifle with Battlelink Minimalist stock and Anderson lower.
September 3, 2018
1 year ago

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