DAILY DEAL Exp. 7/24, 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

In stock

Special Price $ 399.99

Regular Price: $ 739.99

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 Yes
Daily Deal Expires 7/24
Unit Price No
Youtube Video No
Free Shipping? Yes
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 118 questions Browse 118 questions and 224 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
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 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.
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
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
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.
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.
What tools do I need to assemble?
B B on Sep 6, 2018
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.
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
Does this ship straight to your home?
Best p on Nov 22, 2018
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 C on Jun 7, 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.
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.
Is there a QD mount on the end plate or the stock?
LNguyen on Apr 23, 2019
Will this kit be able to ship to California?
Eddie on Feb 13, 2019
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 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.
Is the hand guard polymer or metal?
Matt H on Dec 27, 2018
BEST ANSWER: It's an aluminum hand guard.


4.8 / 5.0
296 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great Build Kit
No quality issues and everything was in the Kit. Second build from PSA! Now to Go and Shoot it!
July 16, 2019
2 weeks ago
Missing bolt for front mbus sight
Good build kit, except it didnt come with the bolt for the front mbus sight it was missing
July 13, 2019
1 month ago
A terrific buy!
Everything fit together perfectly and easily. Great and inexpensive package for someone starting out.
July 13, 2019
1 month ago
1st. Build!
I purchased two build kits, one for me and one for my son. I had just had surgery and I could do very little. This gave me a project. Everything went together perfect. My first build and enjoyed all of it.
Complete AR15
Complete AR15
July 13, 2019
1 month ago
Great gun, shoots great. Fit my lower perfectly.
User submitted image
Added Jul 12, 2019
July 12, 2019
1 month ago
Shoots great and easy to put together
July 12, 2019
2 months ago
PSA 16" 5.56 NATO rifle kit
Purchased for a birthday gift and first build for my son. He loves it and works great, looks great too.
User submitted image
User submitted image
User submitted image
User submitted image
July 12, 2019
2 months ago
A quality upper that convinces me I'll be back to build another!!!!
High quality. I am so happy with my purchase. I was able to assembly a high quality rifle with close tolerance at a price that could not be found locally.
July 10, 2019
1 month ago
Excellent for first-time builder
I built my very first AR with this kit and an Aero lower. Everything went very smoothly!
My only gripe is that the stock does not have a QD attachment point. You can hack a IWC Mount N' Slot onto it, though, or use a cheap QD end plate off eBay.

Add an Aimpoint PRO to this setup and you have a very versatile budget rifle.
The MBUS sights are great and pair well with the optic! I keep the adjustment tool inside the pistol grip, along with a quarter to adjust the Aimpoint.
July 7, 2019
1 year ago
First Ar build
This was my first AR build. Kit came with in 3 days. Everything bags neat and separate which made Asembly easy. Love it. No instructions just you tube it. Gun fire great. Will be ordering another kit.
July 7, 2019
1 month ago

Customers Who Viewed This Item Also Viewed