PSA Gen4 16" 9mm Nitride 1/10 13.5" Lightweight M-lok Railed Upper With BCG & CH - 5165449632

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PSA Gen4 16" 9mm Nitride 1/10 13.5" Lightweight M-lok Railed Upper With BCG & CH - 5165449632

In stock

Special Price $ 329.99

Regular Price: $ 479.99

Quick Overview

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: 5165449632
UPC: 5165449632
MFR#: 5165449632

Barrel Length: 16"
Barrel Profile: A2 Style
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 13.5" Lightweight  M-Lok Rail
Bolt Included: Yes, (Gen 4, Hybrid)
Bolt Steel: 8620, Nitride Treated 
Charging Handle included: Yes

Add To:

Barrel: 16" 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 13.5" 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 enhanced firing pin and external 5.56 style extractor. The bolt carrier group is compatible with most aftermarket fire control groups. 

SKU: 5165449632
SKU 5165449632
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: 5165449632

Questions and Answers

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Browse 27 questions Browse 27 questions and 52 answers
Gen 4 Hybrid 9mm BCG, how does this differ from the G-9 Hybrid 9mm BCG?
JasonandErin C on Sep 26, 2018
BEST ANSWER: Can someone answer this please. My g-9 will not shoot glock 32 round mags.
will this work with an ar-15 lower with mag adapter?
john g on Oct 3, 2018
BEST ANSWER: Yes, there are many options of 9 mm Magwell adapters or there's the Mean Arms Endo Mag option which allows you to use your pmags and convert them to 9 mm.
Will this work with a PSA Blackhawk classic lower item no 8002 - designated multi cal?
Pat M on Nov 18, 2018
PSA Gen4 16
PSA Gen4 16" 9mm Nitride 1/10 13.5" Lightweight M-lok Railed Upper With BCG & CH - 5165449632
PSA AR15 Complete BlackHawk Classic Lower - 5165448002
PSA AR15 Complete BlackHawk Classic Lower - 5165448002
BEST ANSWER: Yes, you will need an adapter for the mag well to use 9mm.
Does anyone have experience with the Meanarms endomag being used with a PSA 9mm upper? Thanks for sharing.
Ted S on Feb 26, 2019
BEST ANSWER: Yes, they have been working great for me. Inserting them on a closed bolt requires a good solid hit, but other than than that the function has been flawless
does the slide lock back when the magazine is empty?
Jacob R on Feb 21, 2019
BEST ANSWER: Thats a function of the lower, not the upper. If you mount it on a "Colt" style lower, it will lock back as normal. If you put it on most Glock style lowers, they dont usually lock back.
can this be used with any 9mm lower or just PSA only??
walter h on Feb 21, 2019
will this shoot +p ammo?
clay R on Dec 31, 2018
BEST ANSWER: From my own personal experience, this didn't even shoot regular 115 grain. It seemed like the bolt was opening a little too fast causing a lot of blowback and then the entire thing stopped working altogether.
Will this work with the STERN DEFENSE Glock magazine adapter?
Matt W on Jan 30, 2019
BEST ANSWER: have used several different brands of Glock magazines with no problems.
Will this fit a colt 9MM lower and function?
Robert W on Oct 24, 2018
BEST ANSWER: According to the description above, it can be used with Palmetto State Armory 9mm lowers that use either Colt® or Glock®-style magazines.
What is the thread on the 9mm barrel?
j H on Nov 8, 2018
BEST ANSWER: It is in the description, 1/2 - 36.
Does this have a standard barrel nut if I wanted to change rail could I ?
Peter C on Oct 3, 2018
BEST ANSWER: I put together several 9 mm uppers and used AR-15 upper receivers so I see no reason why this PSA upper would be different and use a different barrel nut.
How come this 16” version has a 6061 upper when all the shorter length Gen 4 receivers are 7075?
Gino V on Dec 22, 2018
Will this work with glock style lower?
Brian g on Jul 3, 2019
BEST ANSWER: Yes, this works with Glock 9mm lower. I have PSA Glock 9mm lower on mine and it works great.
Will this work on ks 47 lower?
Steve C on Jul 7, 2019
BEST ANSWER: This 9mm will not work on a KS47 Lower.
I have a MAG Tech lower for my 5.56 carbine. Will this upper mate up with my lower or will I need to make some modifications?
kenstar23 on Mar 7, 2019
BEST ANSWER: it should fit but you will need to adapt your receiver to accept 9mm mags and you will probably need to change the recoil buffer to get it to run correctly
What buffer and buffer spring are required with this upper?
ThHighwayman on Jan 30, 2019
BEST ANSWER: I went with the extra power carbine spring (wolff) and a heavy 9 mm buffer (10.4 oz)
Does this upper have a bolt catch?
Thomas L on Nov 20, 2018
BEST ANSWER: From my personal experience when combined with the Colt magazine PSA lower the bolt catch will function, albeit intermittently.
I have a Aero Precision Lower AR-15 assembly. Can this 9mm drop into my Aero Precision Lower with mag adapter and work?
BGaribay80 on Sep 3, 2019
BEST ANSWER: it should you'll have to change the bolt carrier group I have an endo mag so I can use my PMAG
Will this fit my S&W M&P AR with a magazine adapter?
Bajahumma on Jul 31, 2019
BEST ANSWER: Should, I put mine on a polymer AR lower (standard mil spec) and used a Mean Arms EndoMag and it works great!! I much prefer the EndoMag setup over a magwell adapter.
1) Will this upper work with a Spikes Tactical lower? 2) will the bolt hold open after last shot / mag is empty?
Chris B on Apr 12, 2019
BEST ANSWER: It will work with it so long as it is a 9mm AR lower or you have the magwel conversion device for a 5.56 lower. Last round hold open is dependent on the lower not the upper but most AR-9s do not
What is needed to complete the rifle after you purchase this item and a lower that is purchased from this site?
Dirk R on Oct 27, 2018
BEST ANSWER: All you should need are sights of some variety and you'll be good to go.
Will this work on a Lone Wolf G9 lower?
Jon P on Feb 16, 2019
I just put a Colt lower on mine with a torkmag 9mm adapter to accept Glock magazine.
Is this compatible with the PSA AR-15 COMPLETE MOE STR LOWER?
Steve P on Sep 13, 2019
Purchased this but it doesn’t seem to work with my 5D Tactical dedicated 9mm lower. Nor does it work with my 80% Arms dedicated 9mm lower,,,,both Glock mags. Do these 9mm PSA uppers, especially ones with the Gen 4-9 BCG only work with PSA 9mm lowers? That wasn’t indicated in the product description...
John B on May 5, 2019
Anyone running the 16" PSA 9MM complete upper on an ATI polymer AR lower? Any issues? Thanks for any help.
Ted S on Feb 26, 2019
ARE YOUR BARRELS 4140 OR 4150 STEEL ?????????????????????
STEVES on Feb 22, 2019
Is this available without bcg and ch?
MikeL on Oct 19, 2018


4.4 / 5.0
22 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Works Fine
The only issue I had with the upper was in the beginning when the BCG would get stuck in the rear position when attempting to charge the weapon. I cleaned it and oiled it, but it kept getting stuck in the rear position. I have the PSA lower also, so there should of been no issues. After repeatedly striking it with the palm of my hand and getting the BCG into battery, it fired. After several rounds of heavy 9mm loads fired through it the BCG does not stick anymore. I guess the burrs were knocked off. No issues firing after that and no stoppages.
August 30, 2019
2 months ago
the upper works well, accurate and no FTFs.
August 24, 2019
2 months ago
Had issues with endomag/constant failures to feed
When it does feed it shoots very well. Running an Anderson lower with PSA parts kit, endomag and federal 115 grain ammo. Took about an hour to shoot 100 rounds due to constant failures to feed. Also I miss having a shell deflector, running it seems to spit back some hot stuff if you’re shooting it left handed.
August 16, 2019
1 month ago
Cheap workhorse
Great price, looks good. Seems accurate enough even with the cheap sights I put on it. The 16" barrel makes 9mm almost suppressor quiet. Works great with my endo-mags in a standard AR lower.
August 2, 2019
2 months ago
Great upper for steel
I have two of these. Both are on PSA Glock magazine lowers. One was a PSA complete carbine that I replaced the more convention upper with, one was on a PSA lower. I set this up with a C-More Rail sight and a CMC 9mm Singe stage trigger and gave it to one of my students It is the perfect weight for steel competitions, and completely reliable. He has won two competitions with it in the three months he has been shooting.
July 8, 2019
9 months ago
Don't use RA-410 Drop-In Trigger!
Purchased this 8" and the 16" upper with Gen4-9 BCG. Was sticking when pulling back charging handle. Couldn't figure out the problem. Low and behold, one of the only drop-in triggers that won't work with the PSA Gen4 BCG is the Rise Armament RA-140. Replaced with standard Mil-Spec trigger and now works fine.
May 5, 2019
6 months ago
This thing is amazing
April 25, 2019
6 months ago
The recommendation of modified pmag is a little trying on my patience.
March 5, 2019
8 months ago
Perfect addition to a AR collection
I mounted this upper to a "Glock" PSA lower, shoots perfect.

I do like the "Colt" lower over the "glock", but they're always out of stock. The "glock" canted magazine just don't look right.

But, PSA is always quality.
March 1, 2019
8 months ago
Great plinker
Real fun gun to shoot. Cheap ammo, 100% reliable . Would like to have a fixed front sight and ejection port cover.
February 21, 2019
8 months ago

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