PSA Gen4 4" 9mm 1/10 GX M-Lok MOE SBA3 Pistol

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PSA Gen4 4" 9mm 1/10 GX M-Lok MOE SBA3 Pistol

In stock

Special Price $ 549.99

Regular Price: $ 779.99

Quick Overview

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: 5165458051
UPC: 5165458051
MFR#: 5165458051

PSA Gen4 4" 9mm 1/10 GX M-Lok MOE SBA3 Pistol

Barrel Length: 4"
Gas System: Blowback
Barrel Profile: Heavy
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: PSA Fluted Flash Can
Receiver Material: Forged 7075 T6
Receiver Type: Slick Side
Handguard Type: PSA 6" 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, Mil-Spec
Grip: Magpul, Black
Buffer Tube: 7075 T6 Aluminum 
Adjustment: Fixed
Pistol Brace: Adjustable SBA3 Brace, Black
Magazine: ETS Clear Magazine, 31 Round

Add To:

Barrel: 4" 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 6" Lightweight M-Lok free-float rail and a PSA Fluted Flash Can.  

Flash Can: Palmetto State Armory's new 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: 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 GroupGen 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 SBA3 lower build kit with a Magpul Grip,  PSA 6 position buffer tube, and SBA3 Adjustable Brace.  Does not include last round bolt hold open feature.

SKU: 5165458051
SKU 5165458051
Department Firearms - Handguns
Brand Palmetto State Armory
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: 5165458051

Questions and Answers

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Browse 6 questions Browse 6 questions and 2 answers
Will a silencerco hybrid fit inside the handguard if I removed the flash can? What is the inside diameter?
Wesley on May 10, 2019
What’s the overall length with brace fully compacted?
Chad B on Aug 28, 2019
What’s the length?
Ciro A on May 8, 2019
BEST ANSWER: Enter aBarrel Length: 4"
Gas System: Blowback
Barrel Profile: Heavy
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: PSA Fluted Flash Can
Receiver Material: Forged 7075 T6
Receiver Type: Slick Side
Handguard Type: PSA 6" 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, Mil-Spec
Grip: Magpul, Black
Buffer Tube: 7075 T6 Aluminum
Adjustment: Fixed
Pistol Brace: Adjustable SBA3 Brace, Black
Magazine: ETS Clear Magazine, 31 Roundn answer to this question.
What does GX stand for in the description?
Jose L on Sep 30, 2019
Hi does this
GLOCK MODEL 17/34 9MM 33-ROUND FLAT DARK EARTH MAGAZINE - 47463 fit the gun?
Vu H on May 22, 2019
Do y'all make this gun with a 10 inch barrel?
Dakota W on May 20, 2019


4.5 / 5.0
4 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Good for the price
For the price I can’t complain. The mag release is not as clean as I would like, hard to seat mags, and then when I press the mag release the mags do not fall free, I have to yank them out. Maybe in time they will loosen up . . .
October 16, 2019
Awesome Sauce
Great gun! Really fun to shoot, would recommend for anyone looking for a sweet range toy 👍🏼
User submitted image
Added Jun 16, 2019
June 16, 2019
5 months ago
Not good...but then great.
As a dealer, I have sold many PSA made products and always good reports. I got the Gen4 9 for myself, haven't gotten anything for myself for while so what the heck. Fit and finish is top notch, mags fits nice and snug, no wiggle. I loaded up with Federal 115 fmj. Pull trigger, bang and next round wont fire. I eject mag, clear, reload and chamber, bang. Then wont fire. Every round was same. Chamber, fire and then hammer doesn't drop. Clearly, something big has happened. Open it up and find small parts scattered inside the lower. There is a spring wedged up against the trigger assembly, that explained the no trigger working issue. There was a small metal piece near the bottom of the trigger too. Then I see the source of the problem. The buffer tube was not fully inside the receiver. It needed one more full turn. The buffer retainer was able to come out of its hole along with the spring. This lead to total failure when firing. While not all giddy about this oversights, as someone should have noticed the buffer retainer was not correct, the problem can be corrected without too much ado. I corrected the buffer tube and put a new retainer and spring in. Took the trigger assembly out and cleaned everything out. Put it back together and ran 150 rounds without a flaw. The pistol is a joy to shoot as I hoped it would be. And while this should have been noticed during assembly of the pistol, I forgive the error completely. Everybody makes mistakes and all of the product I've ever gotten from PSA has been great. I reality, I would give this 5 stars yet, but because I had to mar up the buffer nut a bit by unscrewing it and retightening it and I had to put a new spring and buffer retainer in at my cost, I taking one star away. I'm sure my gun was a rare exception and just an example of a simple mistake leading to a dead on arrival firearm. But I still highly recommend this pistol and I will likely get another one or two when back in stock.
May 21, 2019
Response from Palmetto State Armory
We do apologize for that. Please contact Customer Service so we may resolve this issue.
May 22, 2019
Casey S
excellent function
This thing chugs chugs and chugs the ammo, all types of ammo and weights. Works every time, hand guard comes off very easily for swapping flash can. 1/2x36 threads so look for an adapter if you need 1/2x28" threads.
May 8, 2019

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