PSA Gen4 8" 9mm 1/10 GX M-Lok MOE EPT Shockwave Pistol - 5165450022

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PSA Gen4 8" 9mm 1/10 GX M-Lok MOE EPT Shockwave Pistol - 5165450022


Quick Overview

free shipping Free Shipping applies to this item only and not the entire order.

Must be 21 or older to purchase.

If you live in California, please read this notice before ordering.

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: 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: 5165450022
UPC: 5165450022
MFR#: 5165450022

Barrel Length: 8"
Gas System: Blowback
Barrel Profile: A2
Barrel Steel: 4150V Chrome Moly Steel
Barrel Finish: Nitride
Chrome Lining: None
Muzzle Thread: 1/2-36
Chamber: 9mm (9x19)
Twist Rate: 1 in 10"
Barrel Extension: Blowback
Diameter at Gas Block: N/A
Gas Block Type: N/A
Muzzle Device: Birdcage Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: Slick Side
Handguard Type: PSA 7" Lightweight M-Lok
Bolt Carrier Group Included: Yes
Bolt Steel: 8620
Bolt Carrier Profile: 9mm Gen4
Charging Handle Included: Yes
Lower Receiver: Forged 7075 T6 Aluminum
Receiver Finish: Hardcoat Anodized
Fire Control Group: Single-Stage, Enhanced Polished Trigger (EPT)
Grip: Magpul, Black
Buffer Tube: 7075 T6 Aluminum 
Adjustment: Fixed
Pistol Brace: KAK Shockwave Blade, Black
Magazine: ETS Clear Magazine, 31 Round

Add To:

Barrel: 8" chrome moly steel barrel. Chambered in 9mm, (9x19), with a 1/10 twist. The barrel is nitride treated for durability and finished off with a Palmetto State Armory 7" Lightweight M-Lok free-float rail and a bird cage style A2 flash hider. 

Upper: Billet 6061-T6 Slick side AR upper is hard coat anodized black for durability.  These upper receivers are made for us right here in the USA.

Bolt Carrier Group: Gen 4 Hybrid 9mm BCG.  Nitride treated 8620 steel bolt, with an enhanced firing pin and external 5.56 style extractor. The bolt carrier group is compatible with most aftermarket fire control groups. 

Lower:. Forged 7075 T6 aluminum and then hard coat anodized, these lowers are purpose built to accept 9mm Glock®-style magazines.   Designed to work with PSA's new 9mm Hybrid uppers.  The lower is assembled with a Palmetto State Armory MOE EPT Shockwave lower build kit with a Magpul Grip, KAK Industries shockwave buffer tube, and KAK Shockwave Blade.  Does not include last round bolt hold open feature.

SKU: 5165450022
SKU 5165450022
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: 5165450022

Questions and Answers

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Browse 26 questions Browse 26 questions and 16 answers
Is the lower receiver labeled with 9mm or Multi? Only asking if you decide to change the barrel to a 40 S&W.
Matthew L on Nov 1, 2018
BEST ANSWER: It's marked with 9x19.
Will Glock Model 17 magazines fit this pistol?
Bill G on Jan 28, 2019
Will this be offered in .40 or .45 , thanks ?
Allen M on Nov 10, 2018
What is the overall length of the carbine?
Jay12345 on Jan 27, 2019
BEST ANSWER: 26 inches
What home defense HP is best for this pistol and also FMJ for range?
Rick C on Nov 6, 2018
BEST ANSWER: I am running Gold Dot 124 +p through mine. Really good ballistics. Great apartment gun
Will a law tactical folding adapter work on this?
Heath E on Mar 2, 2019
Does this require certain licensing to own or is it considered a pistol?
Tyler F on Nov 2, 2018
BEST ANSWER: This is considered a pistol. No NFA paperwork.
Does the stock on the shockwave fully extend out like a standard AR-15 ?
Eddie B on Nov 1, 2018
BEST ANSWER: No, it tightens down where you want it to be
What is the weight of the pistol, without the magazine and ammunition?
Olberto on Nov 10, 2018
Can I remove the buffer tube ?
Will the AR9 function without the buffer tube?
Nathan on Nov 3, 2018
BEST ANSWER: Blowback requires an equal and opposite force to counteract the force exerted on the bolt by the fired round. It will not be possible to build a blowback 9mm AR without including a buffer. With the requirement to retain the buffer it will be impossible to build an AR without a buffer tube
My Gen 1 held open on the last round Once with a Magpul magazine. I did not study to see why, because I thought I had discovered a new feature.
Maybe PSA could make the L.R.B.H.O. parts so we could put that feature on ourselves in the Free States? Anyone else agree?
Mechtech19 on Mar 1, 2019
BEST ANSWER: Sounds good to me
Will the LAW folding stock adapter work with this platform?
Joe P on Feb 1, 2019
will this weapon accept an SBPDW brace?
Tim J on Jan 25, 2019
Can you put a PDW Brace on lt?
Howard P on Nov 12, 2018
Will the bolt stay open after the last shot?
Paul C on Jan 27, 2019
Does the bolt lock back and stay open after the last shot on this pistol? Please let me know??
pete s on Mar 16, 2019
BEST ANSWER: No, it does not.
Well it take g19 mags?
Charles D on Mar 11, 2019
BEST ANSWER: Yep! I have several OEM and third party and it eats them up! Amazing AR9. I would buy it again!
Will this operate with a fostech echo trigger 2nd gen as is?
Sterling on Mar 3, 2019
BEST ANSWER: I put the other bjnary trigger in mine by Franklin and it fits
there appears to be the same room in lower for any AR platform trigger.
IS this a standard AR upper/ lower? I have a dedicated AR 9mm suppressed upper (NFA registered) and wanted to know if it would fit on this lower.
swatjedi on Mar 12, 2019
What weight buffer does this use?
Philip L on Mar 10, 2019
Does it come built or in 2 separate orders? Does it ship to my address or FFL?
Peter L on Mar 10, 2019
What magazines will fit this?
Daniel D on Mar 5, 2019
Will a JMT drop in trigger work in this lower receiver ?
stevieb117 on Mar 3, 2019
What does the GX stand for in the description ?
John W on Mar 3, 2019
What is the overall length?
Richard J on Feb 21, 2019
i want to cast bullets for this would 356 or 358 be better ?
ray s on Feb 1, 2019
BEST ANSWER: They should be .355


4.8 / 5.0
14 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Best Quality AR9 for the Price!!!
If you like the AR platform, but not want to spend the money on ammo, then the PSA AR-9 is for you! It is a quality pistol that is well made. I already put over 300 rounds through it with no issues. Love it!!
With Red Dot
Without Red Dot
March 21, 2019
Very happy with the quality of this firearm.PSA was easy to deal with.Fast shipping and good communication! It was out of stock so I had them notify me when the item was available.It was a short time before they had the item ready to ship.I have only had time to sight it in but expect no problems with this design.
User submitted image
Added Mar 7, 2019
March 7, 2019
1 month ago
PSA knocked it out of the park again!
Thank you PSA!! lol.

1 it reliable. it’s a blowback operated gun which and Normally very reliable but PSA has nailed it again and given us a very reliable and consistent shooting 9 mm AR.

2 it’s accurate I’m using a site mark for MOE red dot and at 15 m quick aiming I’m able to almost hit a bull’s-eye every time. If I take my time and aim I’m able to keep it in a 1 in square.

3 easy of use.The PSA uses Glock mags and eats cheap wolf ammo to gold not 147 +p ammo. it easy to clean and like all are easy to modify.

5 fun. i can’t believe how much fun i and my wife have shooting this. the recoil it low and ammo cheap and the mag changes fun. we can spend hours at the range to mag change drill and fast shoot

5 the only con The magwell could be a little bit more beveled in the mega release has a pretty sharp 90° on it and if you put the magazine in a little bit on an angle the lips of the magazine will get caught on the mega release and you’ll have to re-adjust to small thing and it’s a training issue that can easily be overcome
EDC storage area lol
fast shooting. all 6 targets in less then 2 seconds. hit two bulls,my wife and i took turns shooting
pew pew life
girls and guns
warning must have good supply of 9mm to feed this beast!!!
March 6, 2019
PSA AR9 vs CZ Scorpion
User submitted image
User submitted image
March 4, 2019
gen 4 AR 9
So far is just what I had hoped for.Have'nt able to shoot as much as I would like the weather has been crappy ice on roads a lot .When it get nice I plan to hit outdoor ranges a lot. I did change pistol grip magpul and add slant magpul forearm both flat earth. I would like to know if I can add pj3a mod butt stock?
March 1, 2019
1 month ago
So far, So Good!
The Shockwave Pistol I received has been accurate and reliable with a variety of ammo from 115 grain to 150 grain. The only thing preventing a 5 Star rating is its lack of a bolt hold open feature after the last round of a magazine is fired.
February 27, 2019
1 month ago
Imperfect, but it is worth the price and as good many more expensive
I've been looking at this item for a couple of years. This year, the SHOT Show sale happened to coincide with me having the money.

Fit and finish are good. The charging handle scrapes some, but that will take care of itself pretty quick. It doesn't have the ambi safety that some of the PSA AR9 builds have (or had), but that is easy enough to fix.

I've put two hundred rounds of S&B 115gr FMJ, 50 of 124 Federal Champion, and 50 of 115gr Winchester White Box without issues. It did fail to feed on a 147gr Winchester Ranger JHP, but that is a big hollow and it was a magazine I've had for a while but I'm not sure if its ever actually been shot. That was the second round out of a five shot string, and the subsequent strings while testing this load all ran fine. So did some old Winchester Silvertip, truly ancient Hydrashocks, and some 135 Horandy Critical Duty.

Using Magpul BUIS (no red dot yet), I'm putting a hundred round multimag dump into a three-inch group at 50 yards. Considering they aren't loctited yet so may have needed to be retightened, and I was shooting for speed. Not amazing accuracy compared to say, an AR15 with glass and STOCK, but for a pistol without shoulder weld, just cheek, and without sling, for it's intended purposes (range fun, but it needs more testing to be classed as a PDW) it works.

That FTF might have been new mag. Might have been a matter of breaking it in. Might have just been it doesn't like heavy JHP.

Down sides...
-No bolt hold open. Oh, the horror. Whatever did everyone who ever carried an M1 carbine, an AK, a G3 or an MP5 ever do? I knew that going in. Not much of a downside.
-It doesn't have much of a feed ramp, so it might be ammo sensitive (needs more testing, but it's a damn fun range toy).
-One of the things I don't like is the magazine well could be beveled- that's a lot of metal, and there is no funnel. I'm tempted to rape the warranty and take a file to that. That cost it a half star.
-The magazine release bound up on me twice and didn't want to release, but I also didn't lube it prior to firing it for the first time. So time will tell.

Four starts, even at full price. Because all of those negatives I've seen happen with AR9s with a higher price. Compact, fun, and very accurate for what it is. Once it's broken in fully, say in another five hundred rounds, I might give it an extra half star.
February 17, 2019
High Quality Firearm
Great value. Well built and reliable weapon. Runs perfect with Glock 33 magazines.
February 17, 2019
Nice 9mm platform
Pretty nice setup, very light. Add a Sig Romeo5 red dot and shots on the money. The mag that comes with is ran fine...probably not the greatest but runs ammo like any other mag I own. Ordered some PMags for it and ran my Glock mags through it. Not one single miss fire. Great gun!
February 10, 2019
One of the best AR9 platforms. I have had zero issues with it. Would recommend it! Only draw back, comes with one magazine. Then again, you are getting a great product. Magazines for this are easy to get and affordable.
January 30, 2019

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