16" AR 15 Build Kit with MBUS

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

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Regular Price: $ 739.99

Special Price $ 399.99

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: 516446780
UPC: 516446780
MFR#: 516446780
  • 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
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 516446780

Questions and Answers

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Browse 99 questions Browse 99 questions and 169 answers
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.
Can this kit be shipped to ny without an ffl?
Shane M on Apr 28, 2018
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 this product ship to Ca??
Freddy on May 1, 2018
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
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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
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.
Is this a quality stock...will it rip my beard hairs out?!
Joshua S on Jul 28, 2018
Does it ship to NJ?
Boris K on May 13, 2018
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 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.
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.
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: This is all based on reading, but the answer that I get is that the mid-length gas system will probably have a little less recoil due to less gas pressure pushing the bolt back, but sufficient pressure to cycle. I also read that carbine length seems better for full-auto or an adjustable gas block. I'm getting 16" mid-length.
What tools do I need to assemble?
B B on Sep 6, 2018
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
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.
Is this a complete build or just the upper?
Nick M on May 14, 2018
BEST ANSWER: It is a complete build kit minus the lower receiver. The upper will come assembled.
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.
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
Will this kit be able to ship to California?
Eddie on Feb 13, 2019
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.
When is this deal good through?
Cody W on Dec 27, 2018
BEST ANSWER: 24/7, 365, at whatever they're selling it for, this deal is AMAZING!
What charging handle is in this upper?
Ryan H on Jul 24, 2018
BEST ANSWER: Standard military style charging handle, non-ambi. I am lefty and don't have a problem, just takes some time to get used too.
does this kit come with all of the parts to assemble the lower?
shawn h on May 12, 2018
BEST ANSWER: Yes, this has everything you need to build a complete rifle, except for the stripped lower receiver. Link below.

Is there a QD mount on the end plate or the stock?
LNguyen on Apr 23, 2019
Is the hand guard polymer or metal?
Matt H on Dec 27, 2018
BEST ANSWER: It's an aluminum hand guard.
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
What lower will work with this upper?
Shotgun on Mar 2, 2019
BEST ANSWER: Any milspec should work. I've been running it on an Anderson lower and it's been perfect.
Will this upper shoot 223 and 556 ?
William H on Dec 26, 2018
BEST ANSWER: Yes 5.56 chambers shoot either, .223 chambers should use .223 only. .223 Wylde shoot either as well.


4.8 / 5.0
259 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Highly Recommend
Kit was easy to put together and mated well with my Anderson lower. Rail screws had to be tightened a bit and I put some blue locktite on them to make sure they don't back out. Took a carbine class with it and had no issues after 300 rounds. Can't believe the quality for the price I paid. Bolt marked C158.
User submitted image
Added May 25, 2019
May 25, 2019
I love it.
I love my psa AR15. The handguard is a different cut from the rest of the upper reciever and I was missing the trigger guard roll pin, but it everything was functional and shoots great. I put about 400 rds in it so far and not a single malfunction. Would certainly buy again.
User submitted image
Added May 24, 2019
May 24, 2019
2 months ago
She runs
Can’t beat it for the price. I have about 800 rounds thru it so far and no hiccups. Love it.
May 24, 2019
2 months ago
Great for a first time build!
Used for a time first build (and my first rifle) and went together with my Aero lower with ease. Only issue was I forgot to ensure the hand guard was tight so it moved during break in. Few drops of loc-tite and Bob’s your uncle. This kit is great for a novice like me and seems to shoot very well.
User submitted image
Added May 19, 2019
May 19, 2019
2 months ago
First time build. Great results. Legal in upstate NY.
I put this upper together with an Anderson lower. I add the sig sauer romeo 5 to it for faster targeting. I ordered it off the website on Sunday and got it by the following Friday (NY). I put it all together in about an hour following the YouTube video. The entire upper was well manufactured and really put together well. It's very impressive for the money. I sighted every thing in within about 10 to 20 rounds using the Federal American Eagle 223Rem. 55 grain. I also shot 5.56 62gain and some steel case. 223 55gr TulAmmo. I put about 100 rounds through it so far and nothing had come loose or been any problem what so ever. The only thing is that in NY you have to make it so the 10rd magazine doesn't come out if you have certain "evil features" on your AR. Overall very satisfied with PSA and I'll be back to order more great products.
16" 5.56 NATO 1.7 midlength nitride 13.5" lightweight M-lock
In Walmart case.
May 18, 2019
Was a nice kit. Easy to build, reliable performance.
Nice kit for building
May 18, 2019
2 months ago
Awesome awesome awesome
Honestly for the price you cannot beat this! Kit came complete and well put together. I paired it with an 80% lower and its flawless. 2500 rounds later I'm fully impressed with its functionability and accuracy even with 55gr factory loads. Will be buying several more when I can !
User submitted image
User submitted image
User submitted image
May 18, 2019
2 months ago
Awesome parts and quick shipping.
May 5, 2019
2 months ago
More than I hoped for
This upper attatched to my 80% Arms lower like it was factory made for it. I have shot several brands of ammo both .223 and 5.56 with absoluty no issues I could not be happier with this upper.
April 30, 2019
10/10 for entry level
First rifle, build, and gun. Saw a similar build on a YouTube channel and decided this was the one for me. I'm new to shooting and I couldn't have picked a better choice to start, great price for the product that you get. I've recommended this kit to several of my friends and will continue to do so until I feel like I shouldn't which I doubt. Overall I'm very please with this and would/will buy another.
This is my first rifle and gun I have bought, owned and built. 10/10 highly recommend
This is my first rifle and gun I have bought, owned and built. 10/10 highly recommend
April 30, 2019
2 months ago

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