Gen3 PA-9 Billet Slick Side 4" Upper with Lightweight 6" M-Lok Rail

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PSA Gen3 PA-9 4" 9mm 6" Lightweight M-Lok Railed Upper With BCG & CH


Quick Overview

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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.

SKU: 5165447524
UPC: 5165447524
MFR#: 5165447524

Barrel Length: 4"
Barrel Profile: Heavy
Barrel Steel: Chrome Moly Vanadium 
Barrel Finish: Nitride 
Chrome Lining: No
Muzzle Thread: 1/2-36
Chamber: 9mm (9x19)
Twist Rate: 1 in 10"
Barrel Extension: 9mm, Blowback
Muzzle Device: PSA Fluted Flash Can
Receiver Material: Billet 7075 T6
Receiver Type: Slick Side 
Handguard Type: PSA 6" Lightweight M-lok Rail
Bolt Included: Yes (G3-9mm)
Bolt Steel: 8620, Nitride / Heat Treated 
Charging Handle Included: Yes

The Gen3 PA-9 Upper is designed to work with all Palmetto State Armory 9mm Lower Receivers.  To shop all compatible lowers, click here.

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Palmetto State Armory is proud to announce the Gen 3 9mm Pistol upper.  Designed to work with Palmetto State Armory 9mm lowers that use Glock®-style magazines.

Barrel: 4" chrome moly steel barrel chambered in 9mm (9x19) with a 1:10 twist rate.  The heavy profile Barrel is melonite treated for durability and finished off with a Palmetto State Armory 6" M-lok free-float rail and a PSA Fluted Flash Can.

Flash Can: Palmetto State Armory Fluted "FLASH CAN".  This is a solid 6061 aluminum device that is designed to direct muzzle gases and the muzzle flash forward.  Threaded 1/2-36 for 9mm.  Black military-style hard anodizing.  THIS DEVICE IS NOT DESIGNED TO REDUCE RECOIL, MUZZLE RISE, OR FLASH SIGNATURE. This device is designed to direct gasses and noise forward away from the shooter and enhance the weapon's appearance.

Upper: Newly designed billet 7075-T6 slick side upper is hard coat anodized black for durability.  Featuring T-marks, these upper upper receivers are made for us right here in the USA.

Bolt Carrier Group: G3-9mm BCG was developed with a removable center weight to optimize use with captured recoil buffer systems (not included).  An Integrated gas key was incorporated in to the design to produce a solid & reliable carrier round after round.  BCG is nitride treated with an 8620 steel bolt.

To be used with Palmetto State Armory 9mm lowers that use Glock®-style magazines.

Each upper is assembled to order, and test fired to check function. 

SKU: 5165447524
SKU 5165447524
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
SKU: 5165447524

Questions and Answers

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Browse 9 questions Browse 9 questions and 24 answers
Will this upper work on other 9mm branded lowers and LRBHO?
JOHNNY on Jun 13, 2018
Can I use a standard buffer and spring or does it have to be captured? Do I remove the weight from the BCG when using a standard buffer and spring?
Finna F on Jun 14, 2018
I see it says "designed to be used with psa glock lowers" any idea if it will work with an ar15 lower with colt style adapter?
johnny6 on Jun 27, 2018
BEST ANSWER: I have one of these on order. Going to pair it with ar15 lower using KAK style mag insert that takes Colt style mags. Hope it works. I can come back with am update eventually, I suppose.
Will the psa hybrid 9mm upper upper work with a spikes tactical 9mm glock lower?
mike d on Jun 30, 2018
Will this fit a mil spec ar15 lower?
Josh C on Jun 13, 2018
BEST ANSWER: Yes it will I just mounted one on an Anderson lower with a glock mag conversion insert and it worked fine takes a couple 100 rounds to break it in properly so it will function with no issues
What is the diameter inside the handguard? Thanks
Jimmy on Jul 8, 2018
BEST ANSWER: It is about 1.35 inches inside. I wanted to use a Kaw Valley Precision Linear Compensator instead of the original Flash Can and had to use the "Slim" model: KVP-SLIM-XL-COMP-BLK 1/2" X 36. The slim model is is 1.2" outside diameter, and just fits.
Inside diameter of rail? Will a silencerco omega 9k fit under? Omega is 1.475”
Rynothegnome on Jun 29, 2018
BEST ANSWER: Inside diameter is about 1.35", the Omega 9k will not fit inside the rail.
Does this work well with a Stern Defense magwell insert used on a mil-spec AR-15 lower?
BoboDashutr on Jul 17, 2018
BEST ANSWER: I have a drop in mag-well insert I purchased from Brownells that I don't recall the manufacture but it works with it and I can't see how it would not work with another brand.
can I get the barrel muzzle threaded to 1/2x28?
Bob A on Jul 23, 2018


4.4 / 5.0
16 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Very happy with it so far have about 500 rds through it all good.
User submitted image
Added Aug 13, 2018
August 13, 2018
1 month ago
Awesome fun!
I will try to make this 20 characters...this is mounted on a pistol stock with a red dot sight. I own around 30 different guns of various shapes and sizes and this is by far my favorite. A little rifle a little pistol.
August 9, 2018
1 month ago
Great function and price
Functions great. Looks great
August 9, 2018
1 month ago
Charging handle is disasterous
My upper arrived a couple days ago. It seems to work fine on my lower. My lower is actually an 80% lower from polymer80 and I put an AR stoner Colt adapter in it (same style as the KAK adapter). It seems to work fine. I also am using a heavy (8 oz.) and longer buffer. Have not had opportunity to shoot it, but everything cycles fine.

Things to note: (1) The charging handle looks milspec but it WAY out of spec and was jammed into place and hard to cycle. I forcefully cycled a dozen or so times and it was shaving aluminum off like crazy. I was going to keep doing that until it ran smooth, but it was so bad I gave up and swapped in another charging handle, which immediately worked fine. (2) The BCG appears to be identical to 9mm Faxon BCG that have. (3) LRBHO works for me with this KAK style adapter using polymer promag 31 round mags, as well as with metal 31 and 10 round mags I have.

Assembled this thing looks great.
User submitted image
User submitted image
August 9, 2018
Response from Palmetto State Armory
We do apologize for that. Please contact Customer Service so we may resolve this issue.
August 9, 2018
Casey S
Gen 3 bolt is sub par
Had great luck with my 2 other PSA gen 2 bolts. Then I ordered this. The face of the bolt looked like a topographical map. the extractor slot at the bolt face was to tight to allow the extractor to function properly. Rough edges all the way around. I hope mine was the exception as I am usually very pleased with PSA products.
August 7, 2018
6 months ago
Response from Palmetto State Armory
We do apologize for that. Please contact Customer Service so we may resolve this issue.
August 7, 2018
Casey S
Gen3 PA-9 4" upper
This upper is amazing, you don't realize how small it really is until it's in your hands and you can't bring yourself to put it down. The lines on the upper receiver provide a very aggressive look and blend in very well with the forend. I didn't think I'd like the "flash can" but it certainly completes the look and does make range time a little easier on the ears. Everyone who has a go with it comments on the ar15 extractor cleverly engineered into the bolt.
It is running over a hahn block with cpd magazines and holds better groups than most of my pistols though it has a shorter barrel. Magazines are key here, buy good mags and never look back.

Happy Shooting,

B. Pierce
August 2, 2018
1 month ago
Put this on a SBA3 billet lower and it makes a perfect truck gun. Fit and finish excellent. Functions flawlessly with everything I've run through it. Fun gun.
July 30, 2018
1 month ago
Well made, runs like a champ
I have built three firearms with PSA components and have been very happy with each of them.
July 29, 2018
1 month ago
Outstanding value for the price
Mated this upper with a PSA 9mm pistol lower and once I recognized that this bolt group likes lots of lubrication the 'pistol' has run well. As soon as it starts to experience failure to feed more lubrication gets it back running no problem. I have noticed that some of my third party extended mags don't seem to have the spring power to operate properly through a complete mag load. Glock standard 17 round mags have all performed without problem
July 23, 2018
2 months ago
Got it very quick after 7 months of waiting for it to come back into stock. Nice quality but the groove where the charging handle goes is a little tight and needed to be polished and greased very well before use!
July 15, 2018
2 months ago

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