16" Mid-length Ar 15 build kit

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PSA 16" Mid-Length 5.56 NATO 1:7 Nitride 15" Lightweight M-Lok Classic Rifle Kit With MBUS Sight Set

In stock

Special Price $ 329.99

Regular Price: $ 649.99

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: 5165450545
UPC: 5165450545
MFR#: 5165450545


Barrel Length: 16" 
Gas System: Mid-Length
Barrel Profile: A2 Style
Barrel Steel: 4150V Chrome Moly
Barrel Finish: Nitride
Chrome Lining: No
Muzzle Thread: 1/2-28
Chamber: 5.56 NATO
Twist Rate: 1 in 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 15" Lightweight M-Lok Free Float
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-auto
Charging Handle included: Yes
Overall Length: 24.5"

Add To:

Barrel: 4150V Chrome moly steel, chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, nitride treated, and a mid-length gas system. Barrel is finished off with a .750" diameter low-profile gas block, PSA 15" Lightweight M-Lok free float rail, and A2 flash hider.

Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring M4 feedramp 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 Carpenter158 steel. Gas key is secured with grade 8 fasteners and staked. Includes Charging Handle.

Lower Build Kit: Includes the PSA Classic Freedom Lower Build Kit

Includes:  Magpul MBUS Sight Set, Black

SKU: 5165450545
SKU 5165450545
Department Uppers
Manufacturer Palmetto State Armory
Daily Deal Yes
Daily Deal Expires 11/14
Unit Price No
Youtube Video No
Free Shipping? No
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 5165450545

Questions and Answers

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Browse 37 questions Browse 37 questions and 80 answers
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" 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 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" 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" 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.
Can it be shipped to California?
Chris p on Apr 1, 2019
BEST ANSWER: Yes, it'll ship to California. Be mindful of the other gun laws before assembling your rifle.
How well does this barrel hold up compared to a chrome lined one?
grant g on Mar 11, 2019
BEST ANSWER: Having owned both I would say Nitrite is superior in every aspect. Because chrome lined barrels add material to the barrel, Nitride is often more accurate. Nitride is better at corrosion resistance. Nitride also hardens the barrel. Instead of having a soft nickel inside, its a harder nitride chemical treatment. Chrome lined barrels is good marketing.
What’s not included? Will I need just a stripped lower?
King_mervin on Jan 30, 2019
BEST ANSWER: and some tools.... you are going to need a few tools...
Is the upper receiver already assembled including the bolt assist, gas block and tube?
Daniel on Mar 14, 2019
First time build for me, is this kit complete and what tools will I need to assemble?
Garrett D on Sep 9, 2019
Is the bolt carrier nitride or phosphate coated?
James M on Feb 11, 2019
BEST ANSWER: The BCG that comes with all of these rifle kits, unless specified otherwise, comes with nitrided finish, which is superior to phosphate coatings.
Does this barrel have 1/7 freedom marked on it?
Bobby on Jun 22, 2019
BEST ANSWER: Not after I painted it
Does this include the parts to fire it on full auto?
Victor G on May 22, 2019
BEST ANSWER: No it does not, since it is illegal to have a full auto weapon unless you have a SOT license with FFL or a pre 1986 registered machine gun.
Is the BCG Phosphate or Nitride coated?
William L on Jan 30, 2019
BEST ANSWER: Usually if not specified it will be by default Phosphated
Is the bolt carrier group phosphate or nitride coated and HPT/MPI?
Stephen D on Feb 16, 2019
Are these parts mil spec?
Taylor C on Aug 23, 2019
BEST ANSWER: Yes they fit your mil spec lower. Im not a huge fan due the tolerances still fires fine but the rattle is a annoying when you shake her.
Will this shoot .223?
Budda on May 23, 2019
BEST ANSWER: Yes. Everything barreled for 5.56 will shoot .223 just fine. Just make sure you don’t try to shoot 5.56 out of something that says it’s barreled for .223 because the pressure is much higher.
Is the A2 flash hider pinned to the barrel or can it be removed?
Noah Y on Aug 8, 2019
BEST ANSWER: It is removable. I've already swapped it out...
Can you add rail sections? Like 9 slot? Or more
Jr R on Apr 15, 2019
BEST ANSWER: Room for 19-21 slots on top. The bottom and sides are wide open for 28 or more slots. This handguard is 15" over a 16" barrel. Lots of room for slots and add-ons.
Whats a good lower for this build?
Jesse G on Aug 24, 2019
BEST ANSWER: I would go with a standard PSA lower that has the Magpul furniture already seated. That’s what I did with mine. Shoots amazing!
Is this a mil-spec buffer tube?
AWSboys on Jan 16, 2019
Will this fit the. American Tactical Omni hybrid lower?
Joey M on Sep 5, 2019
BEST ANSWER: Short answer probably not.
It seems that when trying to mate the Omni with mil-spec uppers (that are commonly used with much success) they have had little to no success in getting right.
What about a strip lower for this build. Which one would you recommend?
Jesse G on Aug 24, 2019
BEST ANSWER: If you are not going to use a PSA then take your pick of dozens of mil-spec lowers available...
Can we change out the stock for a Magpul slim?
Derek on Aug 22, 2019

Unfortunately we do not allow substitutions.

Best Regards,
PSA Customer Service
The Bolt Carrier Profile says it is full auto. Does that mean the rifle will fire full auto? I just want a semi auto.
Eric B on Jun 17, 2019
BEST ANSWER: No. The full auto BCG by itself does not make the rifle full auto. You need some additional/different pieces in the fire control group to make it FA. The FA BCG is fully legal to us mortals.
What is the barrel profile?
David C on May 28, 2019
BEST ANSWER: at means the weight of the barrel . heavier weighted gives you tighter groups lighter weight barrel spreads out depending on your shooting style . light weight gets hotter faster then heavier weights. unless you go to a custom barrel which are lighter but way expensive .
Are the stocks that come with these considered bump stocks?
Rusty on Mar 25, 2019
BEST ANSWER: No, they are not.
What do I need to complete this kit? Is the upper built? Will I only need to buy a lower to finish the build ?
Ummer on Feb 17, 2019
BEST ANSWER: You need a bare lower and tools nothing else.
Can this ship to residence. Or does it have to be shipped to an FFL?
Fred P on Apr 4, 2019
BEST ANSWER: The kit can be shipped to your home. The stripped lower you'll need will have to be shipped to your FFL.
Jeffrey P on Apr 3, 2019
Does this come already
Joshua H on Mar 9, 2019
BEST ANSWER: upper, yes... the rest you get to do...
Is this build NJ legal?
Christopher L on Feb 28, 2019
BEST ANSWER: Check your local NJ gun regulations/laws.
Send to México?
Miguel O on Feb 28, 2019
BEST ANSWER: Si, Senior.... can ship to 'Mexico"... NEW Mexico, Mexico Beach, FL, Mexico, SC, Mexico, NY, Mexico, ME, Mexico, MD, Mexico, OH, Mexico, PA,Mexico, IN and Mexico, KY
Is it possible to fit a mil-spec carbine stock on this mil-spec mid length buffer tube?
Loki- on Feb 13, 2019
BEST ANSWER: Mid-length refers to the gas system not the buffer tube.


4.6 / 5.0
38 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great kit
Great kit. Great price. Fast shipping. What’s not to like?
November 13, 2019
1 month ago
All parts came with a few extra springs. I am happy with my new toy.
November 10, 2019
1 month ago
Awesome performance
4 stars only because a pretty good little scratch otherwise great performance no failure of any kind with cheap ammo I'm shoving in it
November 5, 2019
2 months ago
Works and handles well
I have put around 300 rounds through it so far and have had zero issues. It is comfortable to hold as is. I would recommend this to anyone looking to build ad AR that isn't considered "high end".
October 28, 2019
2 months ago
Cocked. Locked. Ready to rock.
Recently assembled but haven't taken to the range yet. I don't love the pop up sights but I need a new scope. Overall, very happy with the pricing, look, and feel.
October 28, 2019
2 months ago
Turns money into noise!
The kit came well packaged, shipping damage is very unlikely. I could see no cosmetic defects at all on the upper. I used another brand lower and the parts fit as expected, zero play between the upper and lower. Extra detent spring is appreciated since one of them I launched into the void. I have yet to mount an optic so I can't comment on accuracy, reliability has been flawless so far. At this point I am happy with it. Regards. J.A.
October 27, 2019
2 months ago
It’s a really good rifle kit, I do not regret buying this one bit
September 13, 2019
3 months ago
Great purchase
Great fitment and looks good. Buying another soon.
September 3, 2019
4 months ago
Solid purchase for the price
August 29, 2019
4 months ago
Great buy
Great price! Fast shipping! Great quality!
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User submitted image
August 27, 2019
2 months ago