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 Gen3 PA10 20" Rifle-Length .308 WIN 1:10 Stainless Steel 15" Lightweight M-lok Upper - With BCG & CH

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PSA Gen3 PA10 20" Rifle-Length .308 WIN 1:10 Stainless Steel 15" Lightweight M-lok Upper - With BCG & CH

In stock

Special Price $ 529.99

Regular Price: $ 699.99

Quick Overview

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: 5165491812
UPC: 5165491812
MFR#: 5165491812

Barrel Length: 20"
Gas System: Rifle-Length
Barrel Profile: A2 Style
Barrel Steel: 416R Stainless Steel
Barrel Finish: Stainless Steel
Chrome Lining: None
Muzzle Thread: 5/8-24
Chamber: 308 WIN
Twist Rate: 1:10
Barrel Extension: M4-style
Diameter at Gas Block: .750
Gas Block Type: Low-profile 5 position click switch adjustable gas block
Gas Tube: Black Nitride Gas Tube
Muzzle Device: A2 Style Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: PA10
Handguard Type: PSA 15" M-Lok Free Float Rail with Anti-slip and anti-rotation features
Bolt Carrier Group Included: Yes, Toolcraft PA10 BCG with extra power extractor spring
Charging Handle Included: Yes, 7075 T6 CH Included

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You asked, we listened! Palmetto State Armory is proud to release our Gen3 PA10 Barreled Upper Receiver!  The Gen3 model has been enhanced to improve the reliability and longevity of our PA10 platform. This new platform includes several features that have never before been included on our PA-10 platform. We hope you enjoy these new features and look forward to your feedback!

With enhanced durability and improved function, the new and improved PSA PA10 Gen3 is here.  The Gen3 model offers a black nitride stainless gas tube to better resist high heat and corrosion while maintaining a glossy black finish.  All Gen3 PA10 models come with a dimpled barrel for ease of gas block replacement if you choose to do so. We have also included a newly designed click switch 5 position adjustable gas block so you can specifically tune to your load.

Gen 3 Benefits at a glance:

  • Dimpled 416R Stainless Steel Barrel
  • 5 Position Adjustable Click Switch Gas Block
  • Extra Power Extractor Springs
  • 7075 T6 Charging Handle Included in all uppers
  • Black Nitride Gas Tube
  • Barrel Nuts properly torqued to military specifications
  • Anti-slip and anti-rotation handguards


Barrel: The dimpled, 416R Stainless Steel, 308 WIN 1/10 twist, rifle-length gas system upper is paired with a Palmetto State Armory 15" M-Lok free-float rail, low profile adjustable click detent 5 position gas block, and an A2-style muzzle device. The gas system is enhanced with a nitrided gas tube in order to better resist high heat and corrosion.

Upper:  Precision machined from forged 7075-T6 aluminum, then Black anodize hard coated to MIL-8625 Type 3 class 2. With enhanced dual retention anti-slip and anti-rotating handguards.  

Bolt Carrier Group: Tool craft 9310 steel bolt assembly with extra strength extractor springs that is nitride for increased durability.  8620 carrier, nitride treated, with a nitride treated gas key properly staked with grade 8 fasteners.  A 7075 T6 aluminum charging handle is also included.

The Gen3 PA10 receivers are functionally compatible with the Gen1 and Gen2 upper receivers, however, we recommend matching Gen3 lowers to Gen3 uppers for best appearance and performance.  There are external cosmetic differences when mixing Gen1 with Gen2 and Gen3 upper and lower receivers that some may not find appealing.  

The AR10 platform does not enjoy a common design between manufacturers, like the AR15. As a result, there can and will be subtle differences in the parts kits of various manufacturers. Some parts, like the fire control group, are shared with the AR15 platform to preserve the options for upgrading. For best results, we recommend only using PSA PA10 parts with our uppers and lower receivers. We do not recommend using other manufacturers parts in our products.

SKU: 5165491812
SKU 5165491812
Brand Palmetto State Armory
Department Uppers
Daily Deal No
Daily Deal Expires No
Unit Price No
Youtube Video llR0G_N5rlc
Free Shipping? No
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 5165491812

Questions and Answers

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Browse 15 questions Browse 15 questions and 26 answers
Will this fit DPMS pattern lowers?
Jon P on Dec 28, 2019
BEST ANSWER: Yes, it will. I have the DPMS LR308 and I was able to swap lowers and uppers.
What is the difference between sku --51--65491832-- and --51--65491812--?
c m on Jan 15, 2020
PSA Gen3 PA10 20
PSA Gen3 PA10 20" Rifle-Length .308 WIN 1:10 Stainless Steel 15" Lightweight M-lok Upper - With BCG & CH
PSA Gen3 PA10 20
PSA Gen3 PA10 20" Rifle-Length .308 WIN 1:10 Stainless Steel 15" Lightweight M-lok Upper - With BCG & CH
BEST ANSWER: The handguard (design) is a little different.
Gen 2 vs. gen 3 appearance difference?
Chris h on Dec 27, 2019
What are the appearance differences in gen 2 and gen 3? I bought a gen2 a while back in anticipation of another build.
Chris h on Dec 27, 2019
Will the PA10 Gen 2 lowers work with PA10 Gen 3 uppers?
DENIRO E on Dec 29, 2019
BEST ANSWER: my experience has been 'yes'....
My G2 lower another fellows g3 upper, worked fine
Will this work on my aero lower?
Jim on Dec 29, 2019
BEST ANSWER: No it will not.
How will this AR108 .308 handle military brass? Does chamber accommodate for thicker military brass?
Barearrow on Feb 27, 2020
BEST ANSWER: It will handle any new brass, .308 & 7.62x51 nato just fine. I would suggest a 100 to 200 round break-in period.
Which 80% lower will best fit this upper?
Augusto F on Dec 27, 2019
BEST ANSWER: Any of the pretty red plastic ones that need 20% more to add up to 100%.
Will this be able to shoot 7.62x51 round?
Pappy on Mar 2, 2020
BEST ANSWER: Absolutely. I have this with the Gen 3 lower assembly and shoot both 308 Win and 7.62x51 perfectly.
what do I need to make this a complete upper?
R M on Feb 19, 2020
BEST ANSWER: Optics or iron sights, your choice. It comes with BCG and charging handle
can magpul rails be mounted on this upper?
Hayden H on Mar 26, 2020
BEST ANSWER: Are you talking about magpul m-lok pic rail attachments?
Do you know if this upper will match up and fit okay with my Bushmaster 90828 MOE .308 WIN/7.62 NATO Rifle? It currently has a 16" Barrel and I would like to upgrade to a 20". Thanks
Larry on Mar 18, 2020
BEST ANSWER: I just finished a build of a pa10 gen 3, and I suggest going with DPMS. Constant ejection and loading problems.
It may fit the bushmaster lower but it will either to tight or loose and need shimmed.
How well does this upper deal with steel cased ammo?
James W on Mar 15, 2020
BEST ANSWER: It handles steel cased ammo well. The upper is a little tight out the box. After a 100 Rounds or so it felt a lot smoother. I tend to run brass FMJ through mine but that’s just my personal preference.
Can this ship to my home?
Chuck on Dec 14, 2019
BEST ANSWER: Yes. This is not the serialized part of the gun that requires an FFL transfer. That part would be the lower receiver.


4.8 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great looking work and it fits!!! Keep up the great work!!
March 15, 2020
2 months ago
Reliable and Accurate
I purchased this upper and one of the gen 3 lowers with The A2 stock. This rifle combo loves Fed GMM 168 gr. It basically patterned the M80 ball ammo I put through along with some 165 gr. soft point rounds. Only additions to this rifle was a VG6 Break, a La Rue trigger, and a Vortex 4-16. With the scope dialed at 10X, I shot a 17 round rapid fire group until things started to open up around shot 14. The overall group was 3.5 at a hundred. After letting the barrel cool, I slowed down and was able to shoot minute of angle without any effort. I highly recommend this rifle.

Not only is it accurate, but reliable too. I closed off the adjustable gas block and slowly open it up until it functioning 100%. Making this adjustment and adding the break cut dow the recoil significantly. I will try to post photos of the groups.
User submitted image
Rapid fire group. 17 rounds total
Slow fire five rounds at 100yds. Right at about an inch.
March 7, 2020
Nice AR10 Combo
Purchased the 20” barrel along with the two stage trigger lower. Nice fit between the two, no wiggle or play. Could not be a better with the upper & lower.
March 5, 2020
2 months ago
Love It!
Rifle came together nice and simple and works like a charm.

Although being in CA I had to pick a method to make it 'compliant'. I went with the AR Maglock. (which I have on a couple ofther AR-15s). Unfortunately there is a issue with the MagLock and the PSA lower (which flares out at the top to mate with the upper better). The problem is the spring, that is part of the Maglock rear takedown pin, binds against the pin due to the flar.

There was also a slight cosmetic flaw in the slot for the roll pin that holds the forward assist, but not bad enough to send the upper back, (if I could I would have given 4.75 stars).
First time at the range.
First time at the range.
March 1, 2020
2 months ago
PSA does it again!
Extremely well-made components as usual. Nicely balanced upper.
Best of all, great pricing.
February 27, 2020
3 months ago
Very Impressed
I first became acquainted with the AR platform back in 2008 with the LR-308 series. Found them to be finicky. In the last couple of years, I've used another manufacturer's .308 system professionally, but couldn't afford it for a personal firearm. Ordered this upper and a 2-Stage Gen 3 Lower on a Friday. The upper came in Wednesday. The lower came in the following Friday.

Assembled, the rifle weighs in at 9.5 pounds without optics. The gun shoots as well as I do. Attached a picture of a 3-round group (50 yard) I shot while breaking in. Cleaned between each shot.

Adjustable gas system works well and does a good job adjusting to the load. I believe the weapon will shoot around 1 MOA once I get used to it. I'll need to play around with different loads.

I have to say that I was nervous ordering. Conventional wisdom dictates that you get what you paid for. It may not have the fancy finish of the $2300 gun, but it certainly doesn't shoot any worse than the operator. Machining is good and it is assembled correctly. Well balanced rifle. No malfunctions that were not related to adjusting the gas system. It worked out of the box, but of course I had to play with it. I look forward to hunting with it.
50 Yards
168 Grain Federal GMM
50 Yards 168 Grain Federal GMM
February 24, 2020
The gun looks awesome and have read nothing but good things . Will do a better review after getting glass on it and sighting it in.
Bought the Lower and upper separately got them together and got one clip so far . Unfortunately no glass /optics on it yet so haven't shot it yet but the Gen 3 combo looks awesome. Can't wait to sling some lead. Gonna use it for hunting and long distance playing or maybe a little compitetion . Looking at the precision arms 4x14x44 aces made for the Tactical 308 specifically . Thoughts about the scope and what grain for what situation welcomed.
February 16, 2020
2 months ago
Gen2 was better
The Gen3 upper did not fit well on the lower. Had difficulty seating magazines. The Gen2 has no problems.
February 11, 2020
3 months ago
Gorgeous and very well made by PSA.
Great rifle. Bought the assembled upper and lower separately, both Gen 3. The fit and finish this rifle absolutely put other AR10s to shame.
User submitted image
User submitted image
User submitted image
January 16, 2020
3 months ago
Great upper, great price, 3 days and it was here
Got this upper just before deer season. Cleaned then shot 20 rounds and cleaned again. I zeroed with 150 grain load I developed for my bolt rifle. .77 at a hundred yards with a 5 shot group. Palmetto needs to send instructions on the 5 position gas block! Once I figured it out, it performed flawlessly. Couldn't be more pleased!
PSA gen 3 upper and lower in .308
PSA gen 3 upper and Lower in .308
December 16, 2019

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