PSA Gen4 4" 9mm 1/10 GX M-Lok MOE EPT Shockwave Pistol - 5165450018

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PSA Gen4 4" 9mm 1/10 GX M-Lok MOE EPT Shockwave Pistol - 5165450018

In stock

Regular Price: $ 759.99

Special Price $ 549.99

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: 5165450018
UPC: 5165450018
MFR#: 5165450018

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 Aluminum
Receiver Type: Slick Side 
Handguard Type: PSA 5" Lightweight M-lok Rail
Bolt Included: Yes 
Bolt Steel: 8620, Nitride / Heat Treated 
Lower Receiver Material: Forged 7075 T-6 Aluminum
Lower Receiver Finish: Hard Coat Anodized, Black
Fire Control Group: PSA Enhanced Polished Trigger (EPT)
Grip: Magpul MOE Pistol Grip, Black
Stock: KAK Industries Shockwave Blade
Buffer Tube: KAK Industries Pistol Buffer Tube 
Magazine: ETS 31rd Glock Magazine

Add To:

Barrel: 4" chrome moly vanadium steel barrel. Chambered in 9mm (9x19), with a 1/10 twist rate. The barrel is nitride treated for durability and finished off with a PSA 5" Lightweight M-Lok Rail, and a PSA Fluted Flash Can muzzle device.

Upper: Newly designed billet 6061-T6 slick side upper is hard coat anodized black for durability.  Featuring T-marks, 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. 

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.

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 lower build kit with a Magpul Grip, PSA Enhanced Polished Trigger, KAK Industries Pistol Buffer Tube, and KAK Industries Pistol Stabilizing Blade.  Does not include last round bolt hold open feature.

SKU: 5165450018
SKU 5165450018
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: 5165450018

Questions and Answers

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Browse 18 questions Browse 18 questions and 9 answers
Why does this not have the last round bold hold-open? Is last round hold-open available on an AR-9 that uses Glock mags?
Jim H on Nov 2, 2018
Will standard AR trigger group drop in 9m lower receiver?
Bob A on Nov 2, 2018
Does the flash can come off? I’ve been trying to unscrew it and it won’t budge.
Logan on Nov 14, 2018
BEST ANSWER: Yes. Use 2 adjustable wrenches.
What is the over all length on this?
Charles A on Nov 4, 2018
BEST ANSWER: Fully collapsed and with the brace secured to the tube it measures at 20 5/8”.
Fully extended and with the brace secured to the tube it measures at 24 1/16”.
Will a ptp ranger suppressor fit the muzzle?
Jeff M on Nov 2, 2018
BEST ANSWER: With the brake removed and the proper thread pitch FIXED Barrel adapter it should. If you get the Flash Can removed send Pictures and info to Josh on Face Book PM or via the website contact. I shoot for them and work with them when they are busy. JM
Does this have to be shipped to a ffl?
Jay S on Nov 6, 2018
What is the inside diameter (ID) of this handguard? Wanting to see if my can will fit or if I have to get the 8" version. ~thx
EricX on Nov 10, 2018
BEST ANSWER: The outside diameter (OD) of the flash can is 1 3/16" (2.9 cm or between 2.9 and 3 cm). I would say there's a 1/32" gap between the inside diameter (ID) of the handguard and the OD of the flash can.
What is the overall length?
Mark S on Nov 4, 2018
BEST ANSWER: Fully collapsed and with the brace secured to the tube it measures at 20 5/8”.
Fully extended and with the brace secured to the tube it measures at 24 1/16”.
Does the Law Tactical folding stock adapter work on this platform?
Adam P on Nov 27, 2018
How do I attach mlok attachments to this hand guard? The flash can will not allow it...
Matthew P on Nov 11, 2018
Is this classified as a SBR or only a pistol CCW permit?
Stephen J on Nov 2, 2018
BEST ANSWER: It has a shockwave pistol brace, so it is classified as a pistol. As far as needing a conceal carry permit to keep it on you in a bag or in your car, it would depend on your local laws.
Is the Mag release button aluminum or still plastic?
Rrotz on Nov 7, 2018
BEST ANSWER: It's aluminum.
Does anyone know the unloaded weight including mag?
David L on Jan 16, 2019
Can I put a binary trigger from Franklin Armory in this?
Jeffrey M on Jan 16, 2019
Any problems experienced with Lehigh extreme defender or Lehigh +P Controlled Fracturing in the PSA GEN4 4" 9MM?
Mike G on Nov 12, 2018
Can you ship this to Maryland with 10 round magazines instead of the 31 round magazine?
Greg S on Nov 4, 2018


5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Bought just to play with...well worth the price, well built and fun to play with. Being in 9mm makes it an affordable to go out and play at any time. Get one you’ll luv it
December 10, 2018
2 months ago
Quality great price. Just buy it. You won’t regret it.
This thing is awesome! The quality is there and i like the changes made from the older gen ar9 platforms. The Rail is perfect length and the muzzle device direct the blast away. this thing shoots like a dream so far. Right out of the box 250 rounds no problems. Quality for sure and a great price for the brace extra mag and moe grip. I’d buy another for sure.
User submitted image
User submitted image
November 10, 2018

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