PSA Gen2 PA-10 20" Rifle-Length .308 WIN 1:10 Stainless Steel 15" M-lok Upper with BCG and CH - 5165447551

More Views

PSA Gen2 PA-10 20" Rifle-Length .308 WIN 1:10 Stainless Steel 15" M-lok Upper with BCG and CH - 5165447551


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 (CA Health and Safety Code Section 25249.6).

SKU: 5165447551
UPC: 5165447551
MFR#: 5165447551

Barrel Length: 20"
Gas System: Rifle-length
Barrel Profile: A2 Style
Barrel Steel: 416R Stainless Steel
Barrel Finish: Stainless
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 gas block
Muzzle Device: A2 Style Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: PA10
Handguard Type: PSA 15" Lightweight M-Lok Free Float Rail 
Bolt Carrier Group Included: Yes
Charging Handle Included: Yes

Add To:

New and improved Palmetto State Armory PA10 Gen2 308 Upper is fully assembled and ready for your complete PA10 Gen2 Lower!

With streamlined styling and improved function, the new and improved PSA PA10 is here.  The Gen2 model offers an enhanced chamber and extraction, with a more modern appearance.  

Barrel: 416R Stainless Steel, chambered in 308 WIN with a 1/10 twist, rifle-length gas. Upper is paired with a Palmetto State Armory 15" Lightweight M-Lok free-float rail, low profile gas block, and an A2-style muzzle device. 

Upper:  Precision machined from forged 7075-T6 aluminum, then Black anodize hardcoated to MIL-8625 Type 3 class 2.   

Bolt Carrier Group: 9310 steel bolt assembly, nitride treated for durability.  8620 carrier, nitride treated, with a nitride treated gas key properly staked with grade 8 fasteners.  Charging handle is also included.

The Gen2 PA10 receivers are functionally compatible with the Gen1 upper receivers, however we recommend matching Gen2 lowers to Gen2 uppers for best appearance.  There are external cosmetic differences when mixing Gen1 and Gen2 upper and lower receivers that some may not find appealing.  Gen1 lowers will be available in the future for those who want a cosmetic match. 

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: 5165447551
SKU 5165447551
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? No
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 5165447551

Questions and Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 68 questions Browse 68 questions and 186 answers
What is the weight for this complete upper assembly?
Guest on Apr 20, 2018
What kind of accuracy can I expect from this upper out of the box? Owners of the 18" are claiming 1-2 MOA. Is this one any better?
Hilge on May 11, 2018
BEST ANSWER: I get 1/2 moa at 100 yards with federal 150 grain open-tip match king with mine.
I am going to be doing an 80% build and was curious if your uppers are compatible?
Kate S on Apr 12, 2018
BEST ANSWER: As there are no standard specifications for the AR-10 platform, as there are for AR-15, PSA recommends using PA-10 uppers with their lowers, and vice versa. That is the only way to guarantee functionality.
What's the difference between the lightweight Mlok handguard and the normal Mlok handguard? Obviously if it's a lighter weight, it had to lose the weight from somewhere, but I can't really tell from the pictures.
Keane L on Oct 24, 2018
BEST ANSWER: It's a little skinnier.
Is the barrel 20” and the compensator, making it 22” ? Or 20” all together?
Matthew H on Apr 23, 2018
BEST ANSWER: Barrel is 20. Compensator is screwed onto the end, making it a bit longer. The compensator is NOT permanently affixed so it cannot count toward the length.
Will this upper fit on an m5e1 lower? I already know the recommendations, I just want to know what lowers are compatible besides the pa10 lower.
Shawn on Oct 15, 2018
BEST ANSWER: I don’t know the answer to your question, but what I can Tell you is that I bought this upper last spring and it stove piped rounds and kept double feeding. I tried everything i could to fix the issue, finally gave up and bought a new BCG for it..
Would this format fall under armalite 308, LR308, DPMS, or none of the above?
Hendersonb3149 on Jun 4, 2018
BEST ANSWER: Fundamentally based on DPMS, yet not all parts are interchangeable. There’s info on the site to explain this in more detail.
Will this upper work with a Psa pa10 moe ept lower build kit?
paul on Jan 3, 2019
BEST ANSWER: It will work very well and mate up to make a very nice AR-10. If I had images on hand of mine I would be proud to post them.
Does the headspace need to be checked on these complete uppers before firing?
Jimmy B on Sep 29, 2018
BEST ANSWER: The headspace should be fine as is out of the box. The only time I would be concerned is if you dropped a different barrel or bolt on it after you received it.
Anybody run steel case through this?
William K on Feb 11, 2019
BEST ANSWER: I ran steel through it with no issues.
It is on clearance but I keep getting emails about it. Will u get more if so I do want one. But usually clearance means not getting any more?
Ratsteg on May 31, 2019
BEST ANSWER: It is available now
Does this come with a heavy weight bull Barrel?
G S on Feb 5, 2019
I have a GEN1 lower will this upper function with it or not? I see in the details where it won't be a cosmetic fit but is that the only downside
mmmmmmat on Dec 1, 2018
BEST ANSWER: Read the description at the bottom of the page. The last paragraph before the warning in red is what you want to understand. Good Luck!
Does this upper come with full auto carrrier group?
Bubba on Jan 21, 2019
BEST ANSWER: Yes! This rifle does.
Will this upper fit a Stag arms lower??
a1nstalr on Jan 4, 2019
BEST ANSWER: PSA recommends that you use PSA uppers only on PSA lowers How ever it may fit but not function properly
Is this compatible with the UTAS Xtr12?
Joaquim L on Oct 20, 2018
BEST ANSWER: No!, The PSA Gen2 PA-10 308 upper or it's corresponding PSA lower would NOT be compatible with the UTAS Xte12 in any configurations.
How would this upper work with a 80% lower ?
Silvio S on Oct 21, 2018
BEST ANSWER: As stated almost everywhere on this page, the AR-10 platform is not a "common tolerances" platform like the AR-15. There are subtle differences between parts from every manufacturer, so there is never a guarantee when working on an AR-10 that parts from different manufacturers will fit together correctly, or even at all. That being said, since you basically are the manufacturer when using an 80% lower, you can cut and fit it to this upper. Buy this upper and cut the lower to fit it, and it should work as long as you measure correctly.
PSA GEN2 PA-10 20" RIFLE-LENGTH .308 WIN 1:10 STAINLESS STEEL 15" M-LOK UPPER WITH BCG AND CH, will this fit on a Noreen 80% billet dpms lower?
Allen B on May 4, 2019
BEST ANSWER: No. PSA specifically states they only guarantee it will work with PSA PA-10 lowers.
When will this be back in stock. Will it ever??
Chris on Feb 27, 2019
BEST ANSWER: Yes, It is available now
does this have forward assist?
Evo Dan on Feb 9, 2019
PSA Gen2 PA-10 20
PSA Gen2 PA-10 20" Rifle-Length .308 WIN 1:10 Stainless Steel 15" M-lok Upper with BCG and CH - 5165447551
PSA PA10 18
PSA PA10 18" SS 308 SS15 Upper 1/10 w/ BCG and Charging Handle - 503567
PSA Gen2 PA10 18” .308 Win SS Keymod Complete Upper & Ten Boxes Federal 168 Grain .308 GM308M Ammo
PSA Gen2 PA10 18” .308 Win SS Keymod Complete Upper & Ten Boxes Federal 168 Grain .308 GM308M Ammo
PSA PA10 16
PSA PA10 16" Rifle Length 308 SS15 Melonite Upper 1/10 w/ BCG and Charging Handle
PSA 16
PSA 16" Carbine Length .308 WIN 1:10 Upper with BCG and Charging Handle - 507104
PSA 16
PSA 16" .308 1/10 Carbine Upper - Without BCG or Charging Handle - 482729
PSA PA10 18
PSA PA10 18" SS 308 WIN 1/10 Upper (No Handguards) - with BCG and Charging Handle
PSA PA10 Rifle Length 20
PSA PA10 Rifle Length 20" SS 308 WIN 1/10 Upper (No Handgaurds) - with BCG and CH
PSA 16
PSA 16" Carbine Length 308 WIN SOCOM 1/10 SS12G2 Upper - with BCG and Charging Handle - 508006
PSA 20
PSA 20" Rifle Length 308 WIN 1:10 SSK15 Upper - with NiB BCG and Charging Handle - 7777922
BEST ANSWER: Yes, the PSA Gen 2 PA-10 has a foward assist. Great rifle, 500 rds no problems!
Is the flash hider pinned or just threaded?
Cory A on Jan 3, 2019
BEST ANSWER: It’s just threaded on. Get yourself an AR armorers tool and you can swap it out for whatever you please. I went with a “muzzle enhancer” ;)
Will this upper work with 7.62 ammo?
Jeromy on Feb 20, 2019
BEST ANSWER: Yes. 7.62 x 51 NATO rounds. Not 7.62 x 39 AK rounds.
Do I need to purchase a complete or stripped lower to complete this build?
cliff m on Mar 22, 2019
BEST ANSWER: A complete lower unless you plan on buying the stripped lower and then having to buy a parts kit and put it together yourself.
A2 style barrel so is it lightweight ?
Brian C on Feb 14, 2019
BEST ANSWER: This is a .308 heavy stainless steel barrel... Free floating with a rifle length gas system and A2 muzzle device. Its very accurate and with a 1-10 barrel twist rate its perfect for all heavier 308 bullets.
Can you shoot 7.62x 51 out of it?
Dan75 on Feb 6, 2019
BEST ANSWER: The .308 Winchester and the 7.62x51 are dimensionally identical and for all practical purposes can be freely interchanged with each other. The XM118 (175 gr. OTHP) or the X80 (149 FMJ) rounds offer some decent performance with this upper at a good price depending on availability.
Is the "PSA 15" Lightweight M-Lok Free Float Rail" aluminum or steel?
deric c on Jun 29, 2018
BEST ANSWER: Aluminum, as usual.
Is this one DPMS compatible?
Michael T on Jun 10, 2018
BEST ANSWER: I'm to understand that it is. As far as the bolt and such, it is DPMS compatible. Regarding the lower, I'm told yes, but have also seen people have clearance issues with the charging handle.
What magazines work best for a gen2 upper & lower & which do not work well?
Josh L on May 8, 2019
BEST ANSWER: P mags work best, not to be confused with pro mag. Some steel mags will work but often have issues. SR 25 pattern should work but PSA only recommends P mags.
Do not use pro mags!! These are easily confused with P mags and I found out the hard way that these are too big to insert properly.
I'm getting mixed signals as I do research, but what magazines work best for this puppy?
Jon L on Apr 11, 2019
Is the barrel threaded? could a suppressor be installed on it?
JED36 on Oct 6, 2018
BEST ANSWER: The barrel is threaded 5/8 x 24 as indicated in the listing, and as evident by the flash suppressor on the end (the black thing at the right side of the image).
Find a suppressor that fits 5/8 x 24 (very common) or has an adapter that fits the same and you're good.


4.6 / 5.0
110 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Better than I expected
Shots (after zero)1inch @300 yds Love it!!!!
July 8, 2019
2 months ago
Great upper. Small mods make it the perfect upper.
Awesome price. Awesome deal. Very nice quality. Gave 4 stars because on my upper the bolt release rubs a little on the upper, and I had to grind down the top part of my lower (factory DPMS) right under the charging handle because it would rub. Also prevent the upper and lower from seating right. AR 10’s are not mil spec so making some modifications is part of BUILDING a gun. All said and done it is my new favorite rifle. Would love to do it again in 6.5 Creadmore. Don’t let small modifications sway you from building and awsome riffle for a great price. If it’s that big a deal spend twice as much on a completed gun😏.
July 7, 2019
3 weeks ago
Can’t go wrong with a complete 308 upper for the price.
Looked great with nice packaging and all. Only issue I had, was that it doesn’t fit into my AP M4E1 lower, so had to get an upper to match it, and swap all the parts. Can’t complain as now I have another 308 upper for another build.
July 7, 2019
2 months ago
PSA 20" Stainless Steel AR10 Upper
I am a USMC veteran who passed the rifle course with an M16A1 rifle as Expert Marksman. I was taught to shoot by my Dad at age 10 so I had a head start. I hunted since that age. So I'm not going to stand here and tell you that Palmetto makes the best product ever but what I will tell you is that I purchased this upper five months after I purchased the lower fully assembled with a stock trigger assembly. I put a cheap Simmons 7 x 12 x 40mm scope on it and zeroed it in within five shots. Imagine my surprise at getting 1" groups at one hundred yards, no failure to feeds, no failure to ejects and using plain hunting ammo Winchester Super X 150 grain .308 Win. 2820 fps. I've shot seven rabbits with it and one skunk and one coyote and it just doesn't miss. To say I'm pleasantly surprised is an understatement. What an excellent value!
Thank you PSA, you'll be getting more of my business!
July 4, 2019
2 months ago
What you get is worth more than you get per dollar compared to anywhere else and that's a fact!
I straight up works every time I pull the trigger, at least mine has. With only iron sights so far I would still feel comfortable taking some form of medium game with the medium powered 155gn ammo I've used so far at 300 yard. And you just cant beat the price. And the armaspec stealth recoil spring and enhanced polished trigger keep it a comfortable ride and consistent.
Beautifully simple. No tricks, or added complications. As an infantryman, muscle memory is on point.
Beautifully simple. No tricks, or added complications. As an infantryman, muscle memory is on point.
July 3, 2019
2 months ago
A cost-effective solid performer
After completing my lower build I was looking for a great upper to go with it that wouldn’t break the bank. This upper fits the bill quite nicely. My rifle shoots straight and is very reliable. I did put a compensator on it to lessen the recoil, but it would still be manageable to shoot even if I had not done so. I highly recommend this upper.
Added a comp and a bipod.  Ready for the range and some hunting.
Added a comp and a bipod. Ready for the range and some hunting.
July 2, 2019
2 months ago
Great Value
This is a great value for a .308 complete upper. You can't beat the PSA warranty!
June 30, 2019
2 months ago
The look and feel are great. It has functioned flawlessly. Unfortunately, the feed ramp is very course and rough. I ejected a round after chambering it and the brass as well as the bullets had fairly large scratches in them. Definitely large enough to affect accuracy. I have been filing the feed ramp after each trip to the range, The scratches are getting smaller, and accuracy is improving.
This however, should not be my responsibility. I feel PSA should have made these smooth.
June 27, 2019
2 months ago
Perfect so far
I put this upper on a PSA complete lower. Works fine. I have only tried three different kinds of ammo, will have to change that soon! Perfecta and PMC Bronze grouped nicely at 200yds, ZQI opened up quite a bit. I put a Leupold VXR patrol 4-16 on top. Eager to shoot it more with some premium ammo.
June 26, 2019
2 months ago
Shoots great groups.
June 25, 2019
2 months ago

Customers Who Viewed This Item Also Viewed