PSA 16" Pistol-Length 300AAC Blackout 1/8 Nitride 15" Lightweight M-Lok Upper - With BCG & CH - 5165450142

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PSA 16" Pistol-Length 300AAC Blackout 1/8 Nitride 15" Lightweight M-Lok Upper - With BCG & CH - 5165450142

In stock

Special Price $ 299.99

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: 5165450142
UPC: 5165450142
MFR#: 5165450142
  • Barrel Length: 16"
  • Gas System: Pistol Length
  • Barrel Profile: Heavy
  • Barrel Steel: 4150V Chrome Moly Vanadium
  • Barrel Finish: Nitride
  • Chrome Lining: None
  • Muzzle Thread: 5/8-24
  • Chamber: 300 AAC Blackout
  • Twist Rate: 1 in 8"
  • Barrel Extension: M4
  • Diameter at Gas Block: .750"
  • Gas Block Type: Low-profile
  • Muzzle Device: A2 Flash Hider
  • Receiver Material: Forged 7075 T6
  • Receiver Type: M4
  • Handguard Type: PSA 15" Lightweight M-Lok Rail Partial Picatinny Free Float
  • Bolt Carrier Group Included: Yes
  • Bolt Steel: Carpenter 158
  • Bolt Carrier Profile: Full-Auto
  • Charging Handle Included: Yes
  • Overall Length: 24.5"

Add To:

Barrel: This Chrome Moly vanadium 4150V barrel is chambered in .300 AAC Blackout with a 1:8" twist, M4 barrel extension, and a pistol-length gas system. It is finished off with a .750" diameter gas block, PSA 15" Lightweight M-Lok free float rail, and an A2 Flash Hider.

Upper: The forged 7075-T6 A3 AR upper is machined to MIL-SPECS and hard coat anodized. These uppers are made for us right here in the USA by a mil-spec manufacturer.

Bolt: Bolt is made of Mil-spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec.

SKU: 5165450142
SKU 5165450142
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: 5165450142

Questions and Answers

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Browse 17 questions Browse 17 questions and 39 answers
Why is this called a "pistol length"? Does it not meet the 16" rifle requirements?
Max F on Nov 26, 2018
BEST ANSWER: The gas tube is pistol length. Nothing to do with the barrel size
Will the Rail accommodate a bipod ?
Konrad K on Feb 14, 2019
BEST ANSWER: Yes with an mlok bipod or with a mlok bipod mount that allows the use of the bipod stud . Simple and easy
I want to use suppressed. Is pistol length gas tube an issue?
Dan W on Dec 4, 2018
BEST ANSWER: pistol length gas system is the standard for .300 blackout. It will work suppressed as it's designed to be.
Is the flash hider removable?
Moondog on Nov 28, 2018
BEST ANSWER: yes the flash hider uses a crush washer and screw on style standard flash hider.
Can anybody comment on the muzzle velocity of the commercial 220 grain loads out of this 16 inch barrel? I suspect it would be super-sonic, is that correct?
Alex G on Sep 26, 2019
BEST ANSWER: The 220's im shooting in my 16in barrel setup are subsonic as advertised. Seems you can load the 220 supersonic if you like.
Does the 16” barrel measurement include the flash hider?
John F on Oct 14, 2019

No, the flash hider is not included in the 16" measurement.

Best Regards,
Palmetto State Armory Customer Service
Aside from a different magazine can this be added to standard .223/.556 lower without other modifications?
Matt M on Oct 8, 2019
BEST ANSWER: Absolutely, that’s what I liked about the 300 blackout. You really need to mark the upper and magazine with a piece of tape or something identifying them both visually. Especially if you have several AR’s. You don’t want to put a magazine with 300 blackout in an upper chambered in .223. It could blow the mag out of the well and seriously injur your support hand.
will this fit on any ar15 lower?
andy w on Oct 11, 2019
BEST ANSWER: It won't fit Colt, dpms, or newer bushmasters... But it should be fine for anything else...
Will this upper fit an Olympic arms lower ?
David B on Feb 14, 2019
BEST ANSWER: on older cast aluminum receivers(pre 2004), they may not pin up as is due to variations in Olympic pivot and take down pin locations.
in newer forged lowers... you're good.
Has anyone ran a 16" suppressed? I have heard mixed comments but can't really believe for sure any of them.
Jesse M on Sep 22, 2019
BEST ANSWER: Yes. It cycles just fine, in fact, if even cycles the G2 trident and some 190gr where my 10.5 will not.
Will this fit a Modolus Arms lower?
Glenntime on Jul 1, 2019
BEST ANSWER: Well I went to Modolus arms where it says "Full mil-spec part compatibility."

and this upper says "machined to MIL-SPECS" and "These uppers are made for us right here in the USA by a milspec manufacturer"

So sounds like if mil-speco fits mil-speco your answer would be. . . . . .It should
Will l the hand guard have to be machined to install suppressor ?
Dean S on Jun 24, 2019
BEST ANSWER: Depends on the OD of your can i suppose
Does the top rail run full length?
Steve C on Apr 23, 2019
BEST ANSWER: on this model... yes, full length top rail.
Is this upper Mil-Spec? Will it work with my Colt 6940 as it has a different size firing pin?
Wade B on Oct 14, 2019
Will I need an H3 buffer for this upper to run right, given that it's a pistol length gas system or will it run well with the carbine buffer in my lower?
Paulie on Oct 13, 2019
Will I need to install an H3 buffer, given that this is a pistol length gas system, or will it run right with a regular carbine buffer in my lower?
Paulie on Oct 13, 2019
Does this barrel group come in flat dark earth??
Craig F on Dec 6, 2018
BEST ANSWER: Absolutely.... just grad ya' up some rattle cans and off ya' go.... or cerakote, or hydro-dip, or......


4.6 / 5.0
24 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Very nice 300 AAC Blackout upper. Zero issues!
You cannot beat the price and the quality that PSA offers. Easy budget to build a 300 AAC Blackout for me. PSA stripped lower and PSA CMC lower build kit went together nicely.
Finished and waiting on the ammo
Went together very easy
300 upper
October 18, 2019
2 weeks ago
A lot of bang for the buck,buy it again in a minute
This is my second PSA upper ,got this.for my grandson he and I built it together so hecould hunt with it this winter.We took it out to the range and he really did well with it,no issues at all .If you need a 300 upper this for you
October 12, 2019
2 months ago
Loose fit in my lower overall performance is excellent
October 11, 2019
2 months ago
Looks well made.
Looks well made havent tested it yet
September 4, 2019
3 months ago
16 in 300blackout barrel
Nice.everything they said it was. Wrapped in a plane package. I would buy from them again. Quality.
September 3, 2019
3 months ago
It was my first build but I love it it shots great and it was fun to put together. Will do it again.
August 26, 2019
2 months ago
Nice upper, I gave it 5 stars because it’s good quality, make sure you tighten all screws and loctite it, mine were all loose.
User submitted image
Added Jul 8, 2019
July 8, 2019
5 months ago
Really like my blackout upper.
I really like the 300 AAC upper, I have fired a few hundred rounds through it. Not a single misfeed or jam. 110 grain to 220 grain. Only drawback is ammo is high.
Ruger SR556 lower. PSA 300 AAC upper.
Ruger SR556 lower. PSA 300 AAC upper.
June 23, 2019
5 months ago
June 17, 2019
5 months ago
PSA the way to go!!
PSA didn’t not disappoint. Purchased 300 blackout upper was delivered in the excellent condition and fired with zero failure. Will definitely be purchasing again and again
April 15, 2019
8 months ago

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