PSA 16" Mid Length 1/7 Nitride  15" Lightweight M-lok Upper with MBUS Sight Set, BCG, & CH - 5165448081

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PSA 16" Mid Length 1/7 Nitride 15" Lightweight M-lok Upper with MBUS Sight Set, BCG, & CH - 5165448081


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: 5165448081
UPC: 5165448081
MFR#: 5165448081

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 15" 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
Overall Length: 24.5"
Weight: 4.0 lbs

Add To:

Barrel: 16" 4150V Chrome Moly Vanadium steel 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 15" 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 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.

Includes: Magpul MBUS Sight Set, Black 

SKU: 5165448081
SKU 5165448081
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: 5165448081

Questions and Answers

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Browse 39 questions Browse 39 questions and 118 answers
Does anyone know what it weighs?
K S on Sep 4, 2018
BEST ANSWER: Seriously, just put one on a scale, I'd like to know if it's 8, 4, 3, or 0 lbs.
Is the barrel chrome lined?
Billy on Sep 6, 2018
BEST ANSWER: No it’s nitrided/ melonite coated. Which is better than chrome lining in my opinion.
Is this considered a “freedom” upper?
Chris B on Aug 1, 2018
BEST ANSWER: My barrel on this exact upper is etched "Freedom", so yes
Is the barrel on this upper receiver a 4140 or 4150?
Jeramy C on Oct 29, 2018
BEST ANSWER: There are several "mil-spec" alloys of 4150 steel. At least three of them, ORD 4150, ORD 4150 resulpherized, and chrome moly vanadium, all of which contain vanadium. All are very high quality barrel material. The alloy contents are very similar, as is the performance. I machine 4150 all day long making precision roller bearings for industrial use.
Hi! looking at the pucture looks like the rail is 6 inches only and and another few inches for front sight only but can we put additional rail on the middle on top for additional optics?
Ben G on Sep 24, 2018
BEST ANSWER: It is MLOK in the in between section so if you find a rail attachment piece that mounts via MLOK, then yes.
I was thinking about matching this upper with the PSA AR15 FREEDOM CLASSIC LOWER
SKU: 7779346
UPC: 7779346
MFR#: 7779346

Though I have been shooting all my life, I have little experience with ARs and am a little shy about matching up parts with my limited knowlage.

Do you see a problem with this match up?
Sean G on Oct 6, 2018
PSA 16
PSA 16" Mid Length 1/7 Nitride 15" Lightweight M-lok Upper with MBUS Sight Set, BCG, & CH - 5165448081
PSA AR15 Freedom Classic Lower, Flat Dark Earth - 7779346
PSA AR15 Freedom Classic Lower, Flat Dark Earth - 7779346
BEST ANSWER: Yes they will work together. Ar-15 parts are usually compatible and built to the same standards across most manufacturers because of the military heritage. Ar-10’s parts are usually not compatible between manufacturers though.
What would the weight of this upper be mounted to a complete lower?
LTDave on Sep 25, 2018
BEST ANSWER: How much does your complete lower weigh?
If this is attached to a standard PSA lower, is it considered a rifle or a pistol?
Genghis on Dec 20, 2018
BEST ANSWER: I'm not an ATF agent. The short answer is that it would be considered a rifle. From what I understand 16 inches is the minimum length for rifle barrels. Anything less than 16 inches would be considered a short barreled rifle unless it has a pistol brace.
What ammo works best for this barrel?
Zach12345 on Nov 3, 2018
BEST ANSWER: Best ammo for accuracy would be a match grade between 62 and 82 grains with a 1/7 twist. For range and general plinking 62g nato or even 77g steel case wolf work great for saving that cheddar. 55grain will work all day but you will typically have wider groups.
What would be a good lower for this upper? This would be the first time not buying a complete gun.
Mike C on Sep 29, 2018
BEST ANSWER: Any lower receiver
Is this receiver compatible with PSA 16" MID LENGTH 1/7 NITRIDE 15" LIGHTWEIGHT M-LOK UPPER WITH MBUS SIGHT SET, BCG, & CH - ?
Jacob w on Mar 31, 2019
PSA 16
PSA 16" Mid Length 1/7 Nitride 15" Lightweight M-lok Upper with MBUS Sight Set, BCG, & CH - 5165448081
PSA AR15 Complete MOE EPT SBA3 Lower - 5165448150
PSA AR15 Complete MOE EPT SBA3 Lower - 5165448150
Are the MBUS sights gen 2?
Andrew on Apr 8, 2019
BEST ANSWER: There is no gen 7
Is the gas block dimpled?
Dustin Y on Nov 22, 2018
BEST ANSWER: The barrel is not dimpled. But it’s easy to do.
Is the included charging handle ambidextrous?
Skylar H on Sep 11, 2018
BEST ANSWER: No it isn't. the charging handle is actually made from 6061 aluminum unlike the milspec 7075 CH
Can you attach a silencer to the barrel?
Jake B on Oct 31, 2018
BEST ANSWER: You can remove the flash suppressor/muzzle device and use a direct thread silencer or use the silencer that will slide over the flash suppressor and attach that way.
Just check with the manufacturer of the silencer to see by what means of attachment they use for the model you're interested.
Hope this helps.
Is the stripped lower all I need for this item I'm new to Ar 15 ?
Jesus V E on Jul 15, 2019
BEST ANSWER: No lower parts are included with this upper. You will need a complete lower receiver.
Are the sights the Magpul pro made of steel or are they the polymer version ?
Jason M on May 3, 2019
BEST ANSWER: Polymer version deff not steel, but very solid
Is the barrel pencil type?
Eduard P on May 5, 2019
BEST ANSWER: No. Lightweight refers to the hand guard.
Will this fit on my s&w mp15?
Tkobear on Dec 19, 2018
BEST ANSWER: Yes, the only issue you may have with it is that some of the markings on your lower may not match the upper as most receivers match with the manufacturers markings. Also the finish may differ a little. If you dont care about that then everything else will function mechanically well.
will this fit a Bravo Company complete lower?
greg g on Dec 13, 2018
BEST ANSWER: If it's mil spec, it should drop right in with no problems. I put mine on a Spike's Tactical. It works perfectly. I hope that helps.
Is it melonite or nitride finish?
Brandon K on Oct 8, 2018
BEST ANSWER: Nitride and melonite are the same thing. Both are proprietary forms of ferritic nitrocarburizing processes.
Does this fit a Smith & Wesson lower?
Steady on Oct 5, 2018
BEST ANSWER: I don’t know specifically but I haven’t had any fit me too issues.
Does this upper come with pins?
Big fella on Sep 29, 2018
BEST ANSWER: No no no ......
Is this a m lok free float?
Usmcras on Sep 21, 2018
BEST ANSWER: Yes. It does not make contact with the barrel.
Is there any type of rail on the bottom side of the hand guard to attach grips or lights?
Colton on Sep 12, 2018
BEST ANSWER: There are M-Lok attachments on the bottom of the rail
Love the kit, but I want to change the muzzle break from the standard one to a different brand. Is this possible?
Sebastian R on Jul 10, 2019
BEST ANSWER: Yes. You just use a wrench to break the muzzle device free, then unscrew it. Just remember to use a new crush washer with your new muzzle device.
Will this fit my psa ar15 pistol lower that I purchased for my 10.5 upper?
Agraska on Apr 29, 2019
BEST ANSWER: Yes. Any ar-15 upper will fit on an ar-15 lower
Is this mil-spec?
Kyle N on Oct 16, 2018
BEST ANSWER: It takes the 1/4" take down pins from the lower and I have had no compatibility proplems with anything.
is there an upgrade option for the BCG ?
Bob P on Sep 26, 2018
BEST ANSWER: The BCG I received is marked HPT/MPI. It doesn’t get much better than that other than an unnecessary coating like NiB. What you see is what you get at PSA unless you order a bunch of stuff separately.
Is this an FN barrel? Or does anyone know the manufacturer of the Barrel?
Joshua L on Sep 11, 2018
BEST ANSWER: No. Barrels are DC Machine, owned by Palmetto.


4.8 / 5.0
93 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great compete upper with clean fit and no rattle at all. Very pleased
Great complete upper
Build complete and ready to go
Build complete and ready to go
June 24, 2019
2 months ago
After receiving my upper promptly I might add, I discovered the front pin was to small for my receiver. I called PS and a well intending agent recommended an adapting pin sold at E Arthur Brown. Well after shipping it came to approximately $20.00 and worked like a charm. Only problem was when I put the new upper together on my Colt AR Sporter it was so tight the bolt wouldn’t align with the spring return, not a good machine fit.
I returned the upper for a no questions prompt refund. I gave you three stars only due to the way your prompt responses but had to take away for the product.
June 18, 2019
2 months ago
Can't go wrong here
This upper looks good and functions well. The only issue I have is that the m-lok cuts are sharp. I put an M-lok rail cover to help with the issue.
June 18, 2019
3 months ago
Very nice shoots like a champ vortex scope worked out well
May 10, 2019
4 months ago
Beautifully done upper!!
Good quality material and construction work great!!!!
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May 7, 2019
4 months ago
Very nice for the price
Unbeatable for the price.
May 5, 2019
4 months ago
Great company to deal with for all your needs ,, love the outcome
User submitted image
Added May 2, 2019
May 2, 2019
4 months ago
Thank you guys and gales for the parts I get from Palmetto at a great price and quality ,
Thank you guys and gales for the parts I get from Palmetto at a great price and quality ,
April 30, 2019
4 months ago
Definitely worth the buy. Slim and light, but ready to work!
Love my PSA upper. I also purchased the lower kit at PSA, I’ve got one heck of a freedom stick!!!
Love my PSA upper. I also purchased the lower kit at PSA, I’ve got one heck of a freedom stick!!!
April 25, 2019
4 months ago
Complete Upper for the price of a han dguard
Had wanted something different than the factory furniture and kicked around picking up a 15" hand guard for a while. It doesn't get any better than this. Plug and play, the fit and finish is excellent, and versatility of simply swapping out uppers now is second to none. For the level of use the platform receives, I foresee no issues going from an M4 profile to a pencil profile barrel. Arrived in roughly 8 days and was well packaged. Would not hesitate to go to PSA for any future needs.
February 21, 2019

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