Due to higher than average order volume, please expect shipping times to be delayed up to 10 business days. Please expect longer wait times for Serialized items (FFL required).
Due to higher than average order volume, please expect shipping times to be delayed up to 10 business days. Please expect longer wait times for Serialized items (FFL required).
PSA 11.5" 5.56 NATO 1/7 Nitride 10.5" Lightweight M-Lok Upper - With BCG & CH

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PSA 11.5" 5.56 NATO 1/7 Nitride 10.5" Lightweight M-Lok Upper - With BCG & CH


Quick Overview

It is the customer's responsibility to be aware of all applicable laws and regulations regarding the purchase and ownership of uppers with a barrel length of less than 16". Federal NFA regulations are applicable to this item.

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).

SKU: 5165490918
UPC: 5165490918
MFR#: 5165490918

Barrel Length: 11.5"
Barrel Profile: A2
Barrel Steel: Chrome Moly Vanadium
Barrel Finish: Nitride
Chrome Lining: No
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: A3
Handguard Type: Lightweight M-Lok 10.5" Free Float Rail
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Overall Length: 20.5"

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Barrel:  11.5" Chrome Moly vanadium steel, melonite treated for durability and chambered in 5.56 NATO with a 1 in 7" twist rate. Carbine length gas barrel is finished off with a PSA 10.5" Lightweight M-Lok Rail, a low profile gas block and an A2 flash hider. 

Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized black for durability. These uppers are made for us right here in the USA by a mil-spec manufacturer. 

Bolt: Bolt is made of Mil-spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec. 

SKU: 5165490918
SKU 5165490918
Brand Palmetto State Armory
Department Uppers
Daily Deal No
Daily Deal Expires No
Unit Price No
Youtube Video No
Free Shipping? No
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 5165490918

Questions and Answers

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Browse 13 questions Browse 13 questions and 46 answers
Don't buy the carbine with a2/gas block , their defective?
Hanckes on Nov 30, 2019
BEST ANSWER: English, please.
is the barrel flat black melonite or glossy sodium nitride? have received others before that didnt quite match the company's description.
orion on Sep 5, 2019
BEST ANSWER: You've got it backwards, nitride is flat and melonite has sheen, but but I wouldn't consider it glossy. I own this, it is nitride, therefore it is flat.
Is the barrel made of 4140 steel ? 4150 steel ? or other ?? (I wonder why PSA is not specifying in the description as they normally do )
tom j on Oct 14, 2019
BEST ANSWER: I emailed PSA and they said is indeed 4150 CMV.
I wish they would have better descriptions as well.
What is the inside and outside diameters of this handguard?
Derek S on Sep 5, 2019
BEST ANSWER: About 1.34" ID and the OD is a semi rounded octagon, plus the railed top, between 1.433" at the smallest flat (normal width measurement) and 1.930" high at the front and rear rails, 1.810" high at the non railed middle, with the rounded portions measured diagonally closer to 1.530"
Does this come with the premium BCG?
Tommy on Sep 6, 2019
Bolt is Carpenter 158 Steel, which they only use with their Premium BCG's
Can I put this on a PSA complete lower pistol build? And still be ok?
Brennan G on Jan 14, 2020
BEST ANSWER: Okay as in will you have happiness until the end of days? Or okay as in it will fit to each other? Or okay as in it’s still legally a pistol? Yes to all but the first.
What length gas tube?
j m on Feb 17, 2020
BEST ANSWER: It says in the barrel description that it is “Carbine Length Gas Barrel”.
is this a complete upper? what is the barrel lenght? it says 11.5 and then 10.5. Just want make sure I understand this correctly
Bruce on Jan 20, 2020
BEST ANSWER: The barrel length is 11.5 inches the hand hard is 10.5 inches so you can attach a suppression device. I have already changed my flash hider out for a surefire socom ready. Hope this helps, also it does come with a BCG(bolt carrier group) and a charging handle. All you need is a lower receiver in a pistol configuration.
Will this fit to a Multi lower?
morgan s on Feb 16, 2020
BEST ANSWER: It will fit any standard AR-15 lower. Caliber doesn’t matter...it’s just a different engraving. 5.56, .223, 6.8, multi, etc.
Will the free float rail work with an Adams Arms piston kit with the micro gas block?
Robert F on Dec 7, 2019
BEST ANSWER: Your best bet is to ask AA if they think it will fit inside the rail. There isn't much room in there but I am not familiar with the dimensions of the AA hardware.
Could you change out the barrel on this upper with a 6.8 spc barrel or do you need other modifications?
Jeff L. on Feb 26, 2020
BEST ANSWER: Don't see a reason why not. The handguard is of the narrow lightweight variety so you'd want to make sure that there will be clearance of your 6.8 SPC's gas block etc. Note: If you do that, insure you find the EXACT size tools for removing the handguard screws, etc. They're definitely torqued in to spec, at least mine are.
Will this upper work an a Colt AR15?
Dale C on Feb 16, 2020
BEST ANSWER: yes I believe it will, you'll need to get the and sbr tax stamp first though.
Does anyone know the weight of this complete upper?
Kori T on Mar 3, 2020


4.8 / 5.0
19 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Awesome for the price. Very happy with it!
April 3, 2020
1 month ago
Overall solid upper, would recommend to a friend just getting into building rifles/pistols.
Rifle: I wanted a solid “budget” build and this doesn’t disappoint. Maybe the finish isn’t as nice as people want but it isn’t going to be safe queen or bench shot. A lot of scootin n shootin as the kids call it on a flat range. The grease came off just fine, pretty standard packing grease it wasn’t caked on like I’ve seen elsewhere. The hand guard is very ergonomic and being M-LOK obviously can fit plenty of fancy stuff along the barrel if you’re into that. The 11.5” is perfect length barrel for a truck gun, still being able to reach out plenty far. I have only been able to put a couple hundred rounds through it but it zeroed beautifully and continued to shoot without malfunctions or any type of issue. Overall a solid upper for the price.
LPK: standard LPK, the SBA4 is one of the nicer stocks I’ve seen for AR pistols. The pistol grip is a basic pistol grip with a Philips screw. The only thing I changed was the safety selector for an ambi-selector. Overall solid mil spec LPK, no issues so far we’ll see in the months to come.
March 18, 2020
2 months ago
PSA 11.5" 5.56 upper
The shipment was quick and packaged extremely well. All parts were completed. A pleasure to build.
March 16, 2020
2 months ago
PSA 11.5in. upper
Range yesterday before rains came, zeroed at 30yds with red dot,put 2 on top of each other, (only fired 2 for final adjustment)
ran like a Rolls Royce.
March 16, 2020
2 months ago
Really good value
Has been flawless so far. The finish on it is pretty good and there’s no sharp edges on the hand guard that some people have complained about. I swapped out the charging handle because the one it comes with is pretty small to grip and is pretty bad. Other than the charging handle I have no complaints of any kind. Plus, the charging handle still works as intended, it’s just hard to use in my opinion. But I’ve had 0 malfunctions so far. Great package for the price.
February 25, 2020
Great value
Bought this and a psa pistol lower with an sba4 for a competition carbine build. Thought it was good platform to start off and build up with higher end parts. I have been extremely impressed with the quality PSA has put into these firearms. Runs flawlessly out of the box with 0 stoppages. I've put around 1500 rounds though it. It doesn't feel as smooth as a bcm or DD ARs, but it is such an amazing value. Looking fwd to getting a psa AK, and doing a AR10 build.
BCM KAG, BCM pistol grip, eotech, flashlight
User submitted image
February 22, 2020
2 months ago
Nice looking AR Pistol build.
This upper made a real nice postol. Have not shot it a lot yet. But it all kinds of fun, works great!
February 14, 2020
2 months ago
So far it hasn’t skipped a beat.
February 14, 2020
2 months ago
Great buy
Excellent for the money. Can't beat the price and finish. Purchased Psa pistol lower for it that was horrible for $119. Finish on the lower was terrible but this upper was very nice and a great deal.
February 13, 2020
2 months ago
Runs great!
Weight and balance is near perfect on my pistol lower even running a Silencerco Omega. During the first 100 rounds of break-in, even though I was running it a little dry, no real issues, surprisingly pleasant to shoot especially suppressed Only one minor malfunction on very last round - failure to lock bolt back, and I just wrote that off to break-in period and getting a little cruddy from shooting suppressed.
I am overall very pleased with function, build quality, and accuracy.
February 1, 2020
4 months ago

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