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

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Regular Price: $ 699.99

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 (CA Health and Safety Code Section 25249.6).

SKU: 5165447638
UPC: 5165447638
MFR#: 5165447638
  • 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"

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 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 feed ramp cuts, these 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. Includes Charging Handle.

Lower Build Kit:  PSA MOE EPT Lower Build Kit, Black

Includes: Magpul MBUS Sight Set, Black 

SKU: 5165447638
SKU 5165447638
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: 5165447638

Questions and Answers

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Browse 48 questions Browse 48 questions and 126 answers
What is the difference between M-Lok Classic, M-lok MOE EPT, and M-Lok MOE+ EPT?
Kevin H on Feb 5, 2019
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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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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
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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.
Where it says "weight 4.0 lbs" is that everything shown or just the upper? This is exactly what I want except I want A pencil Barrel. Any idea the weight difference between barrels?
Jethro N on May 2, 2018
BEST ANSWER: Maybe you need to lift weights once in a while if you can't life an extra 8 onces
Can I get some clarification on what the difference between these two SKU's?
Tyler C on Jan 21, 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
BEST ANSWER: The handguard looks different if you watch really closely.
Is it recommended to use 5.56mm or would I be better off using .223?
Eliwonders on May 14, 2018
BEST ANSWER: It is chambered for 5.56mm, it will safely handle the lower pressure .223 Rem. That said be careful if you ever buy one chambered in .223 Rem, that's where you get into trouble if you shoot 5.56mm. With this rifle you are good to go with either.
Is this a fully auto only or does it work as semi as well?
Samuel on Dec 30, 2018
BEST ANSWER: It’s full semi-auto only😂
Is this kit the complete rifle kit? I don’t see a lower? Thanks
Jerry on May 6, 2018
BEST ANSWER: It’s a complete upper with a lower kit. The lower receiver is separate
Is the BCG and bolt the “premium” or the PSA standard? I see the material on the bolt is 158 carpenter and some stuff is chromelined, but it isn’t clear which quality level this is.
B lee on Jun 6, 2018
BEST ANSWER: Its the PSA standard BCG and Bolt
What is the difference between this upper assembly and SKU: 516446780?
Robert B on Apr 29, 2018
BEST ANSWER: Look carefully at the two handguards. This one only has a short top rail section at each end while the other one has a full length top rail.
Is the gas block pinned?
Kim R on Dec 20, 2018
BEST ANSWER: NO!!! Noooooooo... The gas block is NOT pinned. It's held in place by 2 set screws. I've never seen ANY freefloat uppers that are pinned instead of using set screws.
Does the overall length in the description include the buttstock or just the upper itself? I want to buy a case and curious what size? I feel like 36in would be enough but want to make sure.
Jed G on Jan 27, 2019
Is this a barrel marked as a Freedom series?
Troy I on Jan 1, 2019
BEST ANSWER: Yes. The top side shows "5.56 Nato 1/7 Freedom"
At the front of the handguard.
Will this kit work with any lower? That's designed for 5.56 anyhow
Hooli on Jul 3, 2018
BEST ANSWER: As long as is is a standard AR15 or M4E1 platform yes it should.
What bipod fits this kit?
Randy B on Mar 23, 2019
BEST ANSWER: There are m-lok slots on the bottom that you can attach m-lok accessories. I use sling stud m-lok adapters from Midwest industries. You can also attach a section of picitinny rail like those offered from magpul if your bipod attaches to picitinny.
Is this the complete rifle kit? I don’t see a lower....thanks!!
Jerry on May 6, 2018
BEST ANSWER: No lower is included in the kit, which is why it can be shipped to your door. You provide a mil spec stripped lower receiver and a magazine.
Can anyone tell me which buffer weight this comes with? Thanks
Robert S on Jun 24, 2018
BEST ANSWER: PSA only ships carbine weight buffers with their rifle and kits.
will this item ship to MA?
Chris on Mar 5, 2019
What lower should i purchase??? if purchasing this kit.
snowmo33 on Jan 28, 2019
BEST ANSWER: It really does not matter. Any ar15 lower will work. I got an Anderson lower and it’s perfect.
Are the Mbus sights plastic or metal?
Turbo77 on Jun 20, 2019
BEST ANSWER: Polymer housings with metal mechanics.
I the upper reciever already put together?
Randy B on Mar 11, 2019
BEST ANSWER: The kit comes as pictured. So the upper is assembled, you would just need to assemble the lower and mate the two receivers.
Can you use a ar15 lower with this?
Dakota M on Jan 7, 2019
BEST ANSWER: Yes, you most sertainly can. A mil-spec stripped AR-15 lower is all you need to complete a finished rifle.
Is the barrel free floating?
Robert I on Feb 28, 2019
BEST ANSWER: Yes it’s held with the barrel nut. The only other thing touching is the gas block with tube. Thanks
I'm new to the AR 15 crowd. What fore grips can I use on the rifle? Or do I need another attachment?
fiesh27 on Feb 22, 2019
BEST ANSWER: You don't really need a fore grip, the hand guard works fine. But if it's your preference, there are MLoc attachment points on the bottom of the hand guard that will accept accessories. You might be able to attach the fore grip directly to the hand guard or will need to add a bottom rail to attach the fore grip to.
Is this rifle kit compatible with a gen 2 lower? This is the sku:
516445318 Lower
Alexander on Jan 5, 2019
BEST ANSWER: NO definitely not. The gen 2 lower 516445318 is a PA10 (read AR10 = 7.62x51caliber aka .308 Win) The upper is a 5.56x45 caliber commonly know as an AR 15. You need an AR15 reciever or complete AR15 lower. Unless you're trying to build a .308 gun then you need AR10 upper and lower components
Can the A2 flash hider be removed or is it pinned to the 16" barrel?
Jono428 on Dec 19, 2018
BEST ANSWER: A2 flash hider can definitely be removed. I just took mine off and replaced it with a BCM Mod 1. Thanks
First build, what are the bare minimum tools I will need?
n h on Mar 25, 2019
BEST ANSWER: AR tool kit(plenty on market) Bench vise. Follow YouTube vids(plenty of those).
If you have a friend who has done a couple of ARs, it will help you a lot. I had a friend of mine walk me through it. He directed and I did it.
What scope would you suggest for this gun, for all around use ?
Gary D on Mar 11, 2019
BEST ANSWER: I use a red dot. If you want optics, primary arms is a nice option. Many people use nikon p 223 or m 223.
Can a bi pod be attached to the M-Lol rail?
PeanutHead on Jan 29, 2019
BEST ANSWER: Yes with an adapter.
Shoots 5.56 perfectly, however 223 jams about every 3rd round... any suggestions or tips?
SHyman on Jan 24, 2019
BEST ANSWER: No issues with my kit although my buddy who has the same kit had issues with FTE. I polished up the chamber on his and problem solved.
is this a cold hammer forge barrel?
LovellArms on Dec 22, 2018
Is the low profile gas block compatible with the Strike Industries Strike Rail?
Nathan Y on Jun 23, 2018
BEST ANSWER: Yes it is


4.7 / 5.0
103 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Shipped day after ordered.
Received on day 5 after ordered.

Fit and finish great.
This is 4th rifle kit from PSA.
Beautiful rifle.
User submitted image
User submitted image
July 11, 2019
1 week ago
A great experience!
This rifle kit is a great way to get into building your own rifles at home. It includes everything you need to complete the project using your own Lower. It even includes an extra detent and spring which is a thoughtful addition since I launched mine across the garage and of course I couldn't find it. Thank you guys for that.
It functions flawlessly and has been a joy at the range. However, I wanted to "lap" the barrel, but I ran into a problem with that. The 1 inch bore in the upper receiver is not continuous and concentric. The bore under the barrel nut thread is misaligned with the rest of the bore for the bolt carrier. While this does not cause any problems with the operations of the rifle and is not a critical issue, it does prevent the barrel lapping tool from entering the receiver. Not really a big deal, but the drawings I have seen show a continuous 1" bore through the upper receiver.
These kits are wonderful and a great experience to put together.
July 6, 2019
2 months ago
Very good deal for the money
Put everything together with an 80% lower and have had no issues with the rifle so far. Kit came with everything I needed and great quality for the money. Anything can be upgraded in the future if you would want to, but this is a fantastic way to get your feet wet in the rifle building scene! I really liked the Magpul accessories that came with the kit too. Would definitely recommend to anyone wanting to build a high quality, low cost rifle!
June 16, 2019
2 months ago
Fantastic Entry Kit
I loved building up this kit with my 80% lower. It made for a nice entry into this side of the sport because everything required is included in the kit except for the lower and magazine(s). I especially appreciate all of the Magpul parts. The sights are a bit course on adjustment, but will really just be backups anyways. Irons sights are fun on my 10/22, but I plan on keeping some sort of optic on this rifle.

After 6 months of use, I do wish the barrel had a slower twist to better handle 55gr ammo. And I personally would like a lighter trigger as well (I plan I going to a decent 2 stage soon). Everything can be upgraded however, and this got me into it for a great price. No complaints here whatsoever.
User submitted image
Added Jun 15, 2019
June 15, 2019
6 months ago
Awesome kit well built...
This was my first AR and I'm really glad that I bought it from Palmetto. This is an awesome kit! It has everything that's needed except a stripped lower. Everything was high quality and went together easily. It shoots really well and the price was awesome! It does take a few weeks for them to ship it but that's because they build it to order. The entire upper was very well-built and performs flawlessly.
May 24, 2019
3 months ago
PSA all day
If u haven't built an ar do so and do so threw PSA and you'll be glad u did
May 21, 2019
4 months ago
By far my favorite rifle I have it’s light weight accurate and all around great upper
May 18, 2019
3 months ago
I love this rifle kit went together with my Spikes Tactical lower and works like a dream!
May 5, 2019
4 months ago
Totally satisfied with first AR build.
Everything fits perfectly with an Anderson lower. No complaints with the finish. Trigger is smooth- pretty good for a mil spec. Shoots straight. No malfunctions at all with over 200 rounds through it. Eats both brass and steel no problem. Will be buying more from PSA.
May 2, 2019
4 months ago
Lightweight and a lot of fun. One of my favorite kits so far
April 28, 2019
4 months ago

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