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  • PSA Gen4 8" 9mm 1/10 Nitride 7" Lightweight M-Lok Upper - With BCG & CH
PSA Gen4 8" 9mm 1/10 Nitride 7" Lightweight M-Lok Upper - With BCG & CH

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PSA Gen4 8" 9mm 1/10 Nitride 7" Lightweight M-Lok Upper - With BCG & CH

In stock

Special Price $ 319.99

Regular Price: $ 479.99

Quick Overview

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 www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).

SKU: 5165451063
UPC: 5165451063
MFR#: 5165451063

PSA GEN4 8" 9MM 1/10 NITRIDE 7" LIGHTWEIGHT M-LOK UPPER - WITH BCG & CH

Barrel Length: 8"
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
Muzzle Device: A2 Style Flash Hider
Receiver Material: Billet 7075 T6
Receiver Type: Slick Side 
Handguard Type: PSA 7" Lightweight  M-Lok Rail
Bolt Included: Yes, (Gen 4, Hybrid)
Bolt Steel: 8620, Nitride Treated 
Charging Handle included: Yes

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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 9mm birdcage flash hider. 

Upper: Billet 7075-T6 A3 AR upper is hard coat anodized black for durability.  These slick side upper receivers are made for us right here in the USA.

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

SKU: 5165451063
SKU 5165451063
Department Uppers
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: 5165451063

Questions and Answers

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Browse 28 questions Browse 28 questions and 24 answers
What kind of lower is this compatible with?
Rowan on Mar 27, 2019
BEST ANSWER: See PSA Item 516447578
will this bolt carrier group work with a Stern Glock magazine adapter?
GARY E on Mar 27, 2019
is the BCG ramped? meaning it will work with a standard ar-15 lower parts kit hammer
ken e on Apr 2, 2019
BEST ANSWER: Yes it will.
Is this upper compatible with ke Arms 9 mm Billet lower 4 Glock mags?
Shooter on Mar 1, 2019
I have an angstadt arms 9mm AR Pistol using Glock mags. I’m looking for an 8 “ barrel. Will this, PSA GEN4 8" 9MM 1/10 NITRIDE 7" LIGHTWEIGHT M-LOK UPPER - WITH BCG & CH mate with the AA UPD -9 lower?
Wishse on Apr 8, 2019
Is this receiver compatible with New Frontier Armory lower receivers that take MP5 magazines or is it only propietary to PSA parts?
Josh W on Apr 6, 2019
WILL THIS WORK WITH AN AR PSA 9MM PISTOL LOWER RECEIVER and the PSA PART NUMBER?
Franklin F on Mar 28, 2019
BEST ANSWER: See PSA Item 516447578
What kind 50 yard accuracy can I expect?
david R on Aug 27, 2019
BEST ANSWER: I'm running a Holosun micro red dot and with decent ammo I'm able to keep 4" groups with quick firing. I have a little over 1000 rounds through it with zero failures even with running a Franklin Armory Binary trigger.
Can I use an ambi charging handle ?
XxGalantxX G on Apr 29, 2019
BEST ANSWER: This should take any standard AR-15 charging handle.
Will this work with the Yeet Cannon 9mm lower?
Steven T on Jul 24, 2019
BEST ANSWER: Hello,

Yes, this upper will work with the Yeet Cannon 9mm lower.

Best Regards,
(Name Redacted)
PSA Customer Service
Will this work with a Colt 9 mm lower????
Mike D on Oct 17, 2019
does this have a ramped bolt?
henry f on Jul 29, 2019
will this upper and bolt work with mean arms pmag 9mm adapters?
Ryan S on Oct 7, 2019
BEST ANSWER: Yes. Have run about 200 rounds with the adapters with no issues. Just follow the Mean Arms break in procedure for best results
Does this work with the Betsy Ross PX9 lower?
Michael W on Oct 7, 2019
BEST ANSWER: Hello,

Yes, it does.

Best Regards,
Palmetto State Armory Customer Service
Will this upper work with any Mil-Spec handguard made for the AR15?
Brink on Jul 9, 2019
BEST ANSWER: It should. There’s no gas block or air line to worry about so pretty much anything should work.
WILL IT WORK WITH COLT STYLE MAGS?
james g on Oct 17, 2019
BEST ANSWER: no
Is this upper compatible with PSA PX9mm Forged Complete MOE Pistol Glock®-Style Lower? Or there a specific upper I need to purchase?
Richard m on Aug 29, 2019
BEST ANSWER: Hello,

Yes it is!

Best Regards,
Palmetto State Armory Customer Service
Will this work with the Endo mag system and standard AR lower? Heavy buffer needed?
Andrew B on Jul 9, 2019
BEST ANSWER: Yes it will work with EndoMags and yes you need a heavier buffer.
Is the BCG a hybrid or is it designated for Colt or Glock mags?
nick e on Jul 9, 2019
BEST ANSWER: Hello,

This upper has the hybrid BCG.

Best Regards,
(Name of employee removed)
Palmetto State Armory Customer Service
Will this fit onto a PSA AR15 pistol lower? I hear that Matador Arms came out with a Mag-X that lets you run Sig magazines in any AR15 lower.
TimTom on Apr 3, 2019
BEST ANSWER: Yes, I made a post-ban lower, and used this upper/BCG. It’s ran just fine with over 1000 rounds through.
Hello, just ordered this upper. What weight buffer and which buffer spring would you recommend as a starting point? I was planning on ordering an 8 oz buffer and also the AR10 carbine buffer spring to try. I already have an AR15 carbine spring on hand.
Stephen H on Oct 15, 2019
Is this upper compatible with a standard mil-spec lower receiver provided a magwell block is used?
Antonio B on Oct 10, 2019
Will the Gen 4 AR9 upper work with my PSA AR9 Gen 2 lower?
Jeff N on Aug 4, 2019
Does this work with the special edition Betsy Ross lower?
landon m on Jul 29, 2019
Is the bcg ramped ? WILL IT WORK WITH MILSPEC HAMMER ?
Jimmy R on Apr 26, 2019
I have a select-fire lower A-1. Will this bolt run an auto sear?
Nate R on Feb 28, 2019
Hi i like to have 10.5'' barrel
Complete upper
Send me that coat defense.?
Ruben C on Feb 26, 2019

Reviews

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4.8 / 5.0
19 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
17
1
1
0
0
Outstanding upper as expected
no problems here..great looking upper that feels good and mates up great on the PSA billet lower..very clean finish and very well put together..no malfunctions thus far and don't expect any either..another great purchase from PSA!
sweet blaster
sweet blaster
October 16, 2019
Purchased
 2 months ago
Nice upper
Nice upper. Good fit and finish. Works great on an 80% lower with EndoMags.
October 3, 2019
Purchased
 2 months ago
This 9mm upper is the bomb!
I love this upper! It is crazy accurate, one hole groups at 25 yards all day long! I highly recommend this as I would all PSA products.
User submitted image
Added Sep 25, 2019
September 25, 2019
Purchased
 2 months ago
Ar9
Was very satisfied great quality and fit with no problem also purchased sb4 brace to complete weapon all fit great
September 24, 2019
Purchased
 3 months ago
awesome
i love this upper ...I have mine paired with a 10.5 oz buffer and it functions perfectly
September 19, 2019
Purchased
 3 months ago
Great upper! I matched this with a Spikes lower for the LRBHO feature.
September 19, 2019
Purchased
 3 months ago
Super shooter.
Solid upper that shoots constantly box after box.
September 8, 2019
Purchased
 3 months ago
Great Value
I've only put about 250 rounds through it so far with no problems.
September 7, 2019
Purchased
 3 months ago
BCG Weight Pin Came Loose During Operation & Caused Scoring Inside Upper
Pin holding the bcg weight in place came loose and caused scoring inside the upper reciver. All other function of the product has been normal.
September 7, 2019
Purchased
 3 months ago
Response from Palmetto State Armory
We do apologize for that. Please contact Customer Service with your order number so we may resolve this issue.
September 9, 2019
Casey S
Awesome
Tack driver! Puts them touching each other at 25 meters.
September 1, 2019
Purchased
 7 months ago

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