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


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: 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
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: 5165450545

Questions and Answers

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Browse 27 questions Browse 27 questions and 45 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.
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: Yup that’s all you need!
Is the upper receiver already assembled including the bolt assist, gas block and tube?
Daniel on Mar 14, 2019
Can it be shipped to California?
Chris p on Apr 1, 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 include the parts to fire it on full auto?
Victor G on May 22, 2019
BEST ANSWER: This carbine IS semi-auto. It does NOT come with a full auto sear. It does NOT come with a three burst fire control group.
Does this barrel have 1/7 freedom marked on it?
Bobby on Jun 22, 2019
BEST ANSWER: Mine does
Is the bolt carrier group phosphate or nitride coated and HPT/MPI?
Stephen D on Feb 16, 2019
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.
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.
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.
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 this a mil-spec buffer tube?
AWSboys on Jan 16, 2019
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 .
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
Are the stocks that come with these considered bump stocks?
Rusty on Mar 25, 2019
Is this build NJ legal?
Christopher L on Feb 28, 2019
BEST ANSWER: Check your local NJ gun regulations/laws.
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.
Do you pinned and weld the muzzle?
Saroeun Y on Jan 25, 2019
BEST ANSWER: I would say they don’t. Companies only do that with 14.5 inch barrels to make the barrel a “permanent” 16 inches.
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.
is it possible to install a lock pin on the stock to make it california compliant?
Abel R on Jun 12, 2019
Can this be shipped to Maryland?
Kawon G on Mar 17, 2019
Does this come already
Joshua H on Mar 9, 2019
Like some others, I am also wondering what else will need to be purchased along with this to make it complete. And can it be shipped to Ca. to my address or does it need to go to an FFL?
Caleb T on Feb 10, 2019


4.6 / 5.0
24 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great starting point! Relaible!
Great starting point for any build! I substituted a Magpul CTR stock, JP Enterprises light spring kit, and an SI King Comp compensator. I also added a small section of pic rail for my Magpul bipod, and a SIG SAUER Romeo 5 red dot optic. The hand grip is tiny and will be the next thing I replace on this build. The stock trigger is the most basic of parts but came well finished. I did polish the trigger/hammer/disconnector just to smooth it out a bit and I get a crisp clean 4.3-4.6lbs at the trigger. I’m just using it for plinking - sort of a fun gun, but it’s ultra reliable. I have about 300 rounds through it, mostly Horniday loads, with no hiccups at all. I really like the upper, and the handguard. The segmented top pic rail is a cool feature, and the amount of M-lok slots is impressive.
My only criticism is the basic stock and other lower parts are not exactly what I wanted but I liked the barrel length to handguard length ratio and this was the only kit that had this in a lightweight handguard. It came out really nice!
Excellent kit, very reliable weapon!
Excellent kit, very reliable weapon!
July 6, 2019
1 month ago
Incredible Value!
My first build with incredible value!
June 30, 2019
2 months ago
Psa upper spikes snowflake lower
Works very well held a very good grouping
User submitted image
User submitted image
Spikes snowflake lower
Grouping at 50 yards
User submitted image
June 27, 2019
2 months ago
AR-15 Build
I am very pleased with the product. I will order more in the future
June 26, 2019
2 months ago
Great product
Great Product , for the Money . Initial quality , right out of the Box. The Upper fit my 80% lower Perfectly . M Lok accessories came together very nice. PSA does it again .
June 24, 2019
1 month ago
4 out of 5
Good kit would of gave it 5 stars if it would of came with Magpul stock and grip. Have not had a chance to shoot shoot the AR yet. I used a Aeroprecision lower On this built and looks great!
June 22, 2019
2 months ago
Great budget parts, not so great assembly
While this kit and Palmetto in general offer great deals on all sorts of things in the AR platform, this kit was poorly assembled. Sixty rounds in the handguard came loose. Another 30 after that the gas block was loose. I completely disassembled the upper and made sure everything was torqued down. Just be wary when assembling this.
June 17, 2019
Came together as expected. Excellent product
June 17, 2019
2 months ago
Great service, fast shipping, great quality parts
After getting a lower. It was very simple to assemble. Shipping was great and quick. Will definitely be ordering more from palmetto state
Finished building
Finished building
June 13, 2019
3 months ago
Impressed with Palmetto Armory.
I was very pleased with everything I have purchased from Palmetto Armory. I put the lower together with hand tools I have here in my house. Everything in the upper kit was correct for what I wanted. The upper was very well put together. The sights are just what I was looking for. I did buy a castle nut wrench to tighten the buffer tube. The unit is all I hoped it would be. I am an avid target shooter. I also like deer hunting. Thank you Palmetto Armory!
June 11, 2019
3 months ago

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