DAILY DEAL Exp. 6/5, 12pm EST
16" AR 15 Build Kit with MBUS

More Views

PSA 16" 5.56 NATO 1:7 Midlength Nitride 13.5" Lightweight M-Lok MOE EPT Rifle Kit w/ MBUS Sight Set


Quick Overview

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).

SKU: 516446780
UPC: 516446780
MFR#: 516446780

PSA 16" 5.56 NATO 1:7 Midlength Nitride 13.5" Lightweight M-Lok MOE EPT Rifle Kit w/ MBUS Sight Set

  • Barrel Length: 16"
  • Gas System: Midlength 
  • Barrel Profile: A2
  • 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
  • Handguard 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
  • Optics: Magpul MBUS Front and Rear Flip-Up Sights, Black
  • Fire Control Group: PSA Enhanced Polished Trigger (EPT) FCG
  • Overall Length: 24.5"
  • Weight: 4.0 lbs
  • Barrel Marking: "5.56 NATO 1/7 FREEDOM"

Add To:

Barrel: 16" 4150V Chrome Moly Vanadium steel  Freedom barrel, chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a Mid-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. Roll mark on barrel reads "5.56 NATO 1/7 FREEDOM"

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 EPT Lower Build Kit, Black

Includes: Magpul MBUS Sight Set, Black 

SKU: 516446780
SKU 516446780
Brand Palmetto State Armory
Department Uppers
Daily Deal Yes
Daily Deal Expires 6/5
Unit Price No
Youtube Video No
Free Shipping? No
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 516446780

Questions and Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 225 questions Browse 225 questions and 471 answers
Is this a quality stock...will it rip my beard hairs out?!
Joshua S on Jul 28, 2018
BEST ANSWER: Not if you have a quality beard.
What is the difference between M-Lok Classic, M-lok MOE EPT, and M-Lok MOE+ EPT?
Kevin H on Feb 5, 2019
PSA 16
PSA 16" 5.56 NATO 1:7 Midlength Nitride 13.5" Lightweight M-Lok MOE EPT Rifle Kit w/ MBUS Sight Set
PSA 16
PSA 16" 5.56 NATO 1:7 Midlength Nitride 13.5" Lightweight Keymod MOE EPT Rifle Kit w/ MBUS Sight Set
PSA 16
PSA 16" 5.56 NATO 1/7 Mid-Length Nitride 13.5" Lightweight M-Lok MOE EPT Rifle Kit w/ MBUS Sight Set
PSA 16
PSA 16" 5.56 NATO 1:7 Midlength Nitride 13.5" Lightweight M-Lok MOE EPT Rifle Kit w/ MBUS Sight Set
PSA 16
PSA 16" Mid-Length 5.56 NATO 1:7 Nitride 13.5" Lightweight M-Lok Classic Rifle Kit With MBUS Sight Set - 5165448515
PSA 16
PSA 16" Mid-Length 5.56 NATO 1:7 Nitride 15" Lightweight M-Lok Classic Rifle Kit With MBUS Sight Set
PSA 16
PSA 16" 5.56 NATO 1:7 Midlength Nitride 13.5" Lightweight M-Lok MOE EPT Rifle Kit w/ MBUS Sight Set
PSA 16
PSA 16" Mid-Length 5.56 NATO 1:7 Nitride 13.5" Lightweight M-Lok Classic Rifle Kit w/MBUS Sight Set
PSA 16
PSA 16" 5.56 NATO 1:7 Midlength Nitride 13.5" Lightweight M-Lok MOE+ EPT Rifle Kit w/ MBUS Sight Set
BEST ANSWER: "MOE" stands for Magpul Original Equipment which describes the style of hand guard and rails that make up the rifles accessory platforms. "M-Lok" describes the shape of the slots for attachments. "EPT" stands for Enhanced Polished Trigger which defines that the trigger will be smoother and maybe will reduce trigger pull pressure due to the fact it has polished parts that reduce friction. So, with all this said, I picked the M-Lok MOE style and only purchase accessories that are compatible with this platform on all my ARs so that I can swap things around. I hope this helps.
Has the headspace been checked on this barrel and bolt or would I need to get that done if I bought one?
Michael T on Apr 12, 2018
BEST ANSWER: I contacted PSA customer support and they confirmed that these are headspaced and test-fired to ensure proper functioning. It's ready to go.
Does this product ship to Ca??
Freddy on May 1, 2018
BEST ANSWER: Do yourself a favor before you order it. Move out of California. Then order it. I guarantee you'll be much happier.
Can this kit be shipped to ny without an ffl?
Shane M on Apr 28, 2018
BEST ANSWER: This can and will ship to NY. The above answers to this question are incorrect.
I was just wondering, with this kit, is it everything i need to put it together, or do i need anything else, this is my first one, an dont want to get it wrong?
mustang8750 on Jul 14, 2018
BEST ANSWER: Short answer: includes everything EXCEPT a lower reciever.

hey buddy, I was in your shoes just a few years ago, the first build can be a little daunting. This is a great build, I’ve used it a few times. Most online builds (including this one) will need you to still purchased a Striped Lower Reciever to become operational. I recommend Anderson Arms Lowers as they are reliable and some of the cheapest on the market today. The lower parts kit included in this built kit will then go in your lower reciever.
I would like to know the difference between the standard mil-spec AR15 barrel and the Freedom barrel?
T E on Jul 4, 2018
BEST ANSWER: “Mil-spec” would be carbine length gas system. These are mid length.
Are the bolts marked MPI or HPT?
fieldfly f on Apr 12, 2018
BEST ANSWER: these bolts have the Magnetic Particle (MPI) stamping.
Does it ship to NJ?
Boris K on May 13, 2018
BEST ANSWER: Is it legal when assembled?
What lower receiver do you recommend for this upper kit?
Jarod B on Apr 27, 2018
BEST ANSWER: Any AR-15 style stripped lower. PSA lowers have about the best price going, and I’ve built 5 using PSA lower build kits with zero problems.
Is there anything that isn't known to the state of California to cause cancer? Does California cause cancer?
brandon m on Aug 16, 2019
BEST ANSWER: The trouble with Californians is when they move out of the state to Idaho, they want to bring CA laws with them.
What tools do I need to assemble?
B B on Sep 6, 2018
BEST ANSWER: You don't need much in the way of tools. Nice to have is a castle nut wrench, but that can be avoided by using a brass punch. Roll pin punch for the trigger guard pin and the bolt catch pin. A small hammer and either a screw driver or hex-wrench for the grip screw (varies from maker to maker). I assemble them while watching TV.
Is there a way to add a bottom rail to this upper?
Travis B on Apr 16, 2018
BEST ANSWER: Yes. M-lock's base go into the oval on the hand guard. They twist and lock as you tighten them.
Is this kit maryland compliant?
RiChard on Jan 14, 2019
BEST ANSWER: It’s not. On barrel has no heavy barrel or HB mark has. Also, describtion does not say heavy barrel.
There is another kit the same as this one but with a carbine gas system. So whats the difference mid length vs carbine gas system?
Kevin G on Jan 23, 2019
PSA 16
PSA 16" 5.56 NATO 1:7 Midlength Nitride 13.5" Lightweight M-Lok MOE EPT Rifle Kit w/ MBUS Sight Set
PSA 16
PSA 16" M4 5.56 NATO 1/7 Carbine-Length Nitride 13.5" Lightweight M-Lok MOE EPT Rifle Kit With MBUS Sight Set - 516447430
BEST ANSWER: About two inches. The mid-length offers a longer sight radius and a bit softer recoil because the gas impulse is spread-out over a longer distance.
Does this kit come in other colors?
Adam S on Jan 5, 2019
BEST ANSWER: Shop the site using the search engine. You can get other colors.
what will I need to complete rifle?
james b on Mar 7, 2019
BEST ANSWER: The only part with serial numbers. You will need a striped lower. You can get one at almost any gun store with a background check. Also you will need the tools and knowledge to complete your build. knowledge can be found from a friend or YouTube. The tools are very basic. A small hammer some punches and a AR multi wrench are a good start also a vice helps. Good luck and when you learn please teach others. SUPPORT THE 2A
Can this kit be shipped to my home address in Ca or would I need a ffl ?
AR r on Feb 6, 2019
BEST ANSWER: It can be shipped directly to your house, but you will have to buy a stripped lower receiver that will have to be shipped to a FFL.
Can this be shipped to California?
Carlos V on Jun 5, 2018
BEST ANSWER: Yes, you will just need to replace the parts that are not allowed on a featureless rifle if you wish to build one
Does this ship straight to your home?
Best p on Nov 22, 2018
BEST ANSWER: You have to live in a free state.
Will this kit be able to ship to California?
Eddie on Feb 13, 2019
BEST ANSWER: Will it be legal in CA?
Has anyone had any problems with certain Ammo running through this upper?
Matt S on May 11, 2018
BEST ANSWER: No problems so far. Got about 500 rounds through it shooting federal, winchester, hornady and even tula and aside from a few dud rounds of tula everything worked perfectly.
Shoots 5.56 perfectly, however 223 jams about every 3rd round... any suggestions or tips?
SHyman on Jan 30, 2019
BEST ANSWER: It is probably an issue with the 223 rounds pressure. I would suggest trying a different brand of 223 and see if the problem persists. Often on reloaded or remanufactured rounds they will also load on the lower end of the spectrum and this can cause performance issues. You could also install an adjustable gas block to compensate for the lower pressures of the 223 you may be using.
I want to get my son a gun case for this gun. What size do I need?
JANICE T on Dec 8, 2018
BEST ANSWER: The overall length is just under 33 inches, and from the bottom of the pistol grip to the top of the rail is a little less than 7.5 inches. So really anything that'll accommodate those dimensions
Can you use .223 ammo with this rifle or just 5.56?
bcowboi on Aug 4, 2018
BEST ANSWER: You can use both
What magazines are compatible?
Julio C on Apr 4, 2019
BEST ANSWER: Any ar15/m4/m16 mag for 5.56/223/300 black out
It it hbar or does it have a pencil barrel?
Wyatt B on Jul 27, 2018
BEST ANSWER: This comes with an "A2" profile barrel. See the picture below... I hope this helps you.
PSA 16
PSA 16" Mid-length A2 Profile 5.56 NATO 1:7 Premium Barrel - 12117
Does this kit come with the pistol grip, buffer, spring ,tube and butt stock as shown?
JOHN on Jun 7, 2019
Is the hand guard polymer or metal?
Matt H on Dec 27, 2018
BEST ANSWER: It's an aluminum hand guard.
Im a little confused on what else is needed to complete this rifle im very new to the gun world but i think its the trigger what kind do i need please help?
Wilfer C on Dec 12, 2018
BEST ANSWER: You only need a stripped lower receiver, some specialized tools make putting it together easier, but they are not necessary. Everything else to make it functional is provided.


4.9 / 5.0
506 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great kit, i'm very happy with how it preforms.
June 4, 2020
4 months ago
First AR 15
Very nice and sleek looking and came as mentioned great parts and easy to install, can't wait to take it to the range
User submitted image
Added Jun 3, 2020
June 4, 2020
2 months ago
Everything went together easy and Shoot awesome. I plan on buying more stuff soon.
June 1, 2020
1 month ago
Very good bang for your buck.
I was overall pleased with my purchase. Slapped the lower together and operated flawlessly.
June 1, 2020
1 month ago
I love palmetto state armony. Great products , very professional, and very fast shipping. I will be doing the majority of my business with this company. I would highly recommend these guys to anyone and everybody....
User submitted image
Added Jun 1, 2020
June 1, 2020
1 month ago
Another great build thanks PSA.
User submitted image
Added May 30, 2020
May 30, 2020
1 month ago
16" 5.56 upper receiver
this upper is great. super accurate 5 shots in dime size at 100 yards
May 30, 2020
1 month ago
Great Build!
Such a great build, easy to assemble! I love it! Lots of room to add on accessories and upgrade at whatever pace I can afford while still having what i need and the full Picatinny rail on top for my red dot. And the magpul sites are great too.
May 30, 2020
1 month ago
product looks great and an easy build. TO BAD I LIVE IN NEW JERSEY, HAVEN'T BEEN ABLE TO SHOOT IT YET
May 28, 2020
2 months ago
Sandpaper bolt. Still shoots.
Great for the budget. Needs 5K rounds shot through it will a liberal amount of CLP due to a bolt sounds and feels like it has sandpaper as a coating.
DH-15 NOT AR-15 
Because it’s Deer Hunter Semi-auto 5.56
DH-15 NOT AR-15 Because it’s Deer Hunter Semi-auto 5.56
May 27, 2020
2 months ago

Customers Who Viewed This Item Also Viewed