PSA 16" Pistol Length 300 AAC BO 1:8 Nitride 13.5" M-lok Freedom Upper - Without BCG or CH

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PSA 16" Pistol Length 300 AAC BO 1:8 Nitride 13.5" M-lok Freedom Upper - Without BCG or CH

In stock

Regular Price: $ 359.99

Special Price $ 239.99

Quick Overview

SKU: 7792875
UPC: 7792875
MFR#: 7792875

Barrel Length: 16"
Gas System: Pistol Length
Barrel Profile: A2 Style
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
Hand guard Type: PSA 13.5" Anodized M-Lok Rail
Bolt Carrier Group Included: No
Bolt Steel: N/A
Bolt Carrier Profile: N/A
Charging Handle included: No
Overall Length: 24.5"
Weight as configured: 3.7 lbs

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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 nitride treated for accuracy and durability, and is finished off with a .750" diameter gas block, PSA 13.5" anodized 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.

The 300 AAC Blackout cartridge is based on a 5.56 casing, and as such uses a standard AR15 BCG (not included).


SKU: 7792875
SKU 7792875
Brand Palmetto State Armory
Daily Deal N/A
Daily Deal Expires N/A
Youtube Video N/A
Free Shipping? N/A
SKU: 7792875

Questions and Answers

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Browse 4 questions Browse 4 questions and 6 answers
What is the difference between a 16" Rifle Length and a 16" Pistol Length?
Seth S on May 29, 2018
BEST ANSWER: The difference is where along the barrel the gas port is located
I already have a PSA rifle in 5.56. Can I use the BCG from that and the charging handle when I want to switch to this upper? Is there anything else I need to do?
Steve on Jul 9, 2018
BEST ANSWER: Nothing else. Uses the same mag, bcg and charging handle. Just be sure you pay attention to what ammo and upper you are using. Dont accidentally mix them up.
What buffer do you use when using a 16"barrel with a .300 Blackout? Is It determined by the placement of the gas block (pistol vs carbine length)?
Francis R on Jul 25, 2018
I was considering putting a vertical forward grip on my build,will a MLOK type vertical grip fit and work,if not,what type of vertical grip and attachment will work?
James S on Aug 16, 2018
BEST ANSWER: Any MLOK accessories should fit on that rail. The MLOK spots where you'll be able to attach your accessories will be on the bottom and the left and right side of your rail. Should fit right into the slots and when you tighten down they have a piece that rotates and locks in place holding everything in place. YouTube has lots of videos if you curious on what looks/fits best. Hope this helps!


4.8 / 5.0
22 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great foundation for building your own!
Highly recommend this for someone building a .300BO carbine! Shoots MOA now with factory ammo, and I hope to refine that with handloads. Only issue I had with the carbine was actually with the lower kit (also PSA). Stock trigger group was gritty, so I swapped it with a 2 stage 3.5# match trigger
User submitted image
Added Aug 18, 2018
August 18, 2018
1 month ago
Great Upper
Received this on Tues,to the range this morning,everything is as good as I have ever received from PSA.Functions very well,is accurate as my 5.56 I built 3 years ago.Bore sighted at home and zeroed at 25,fired 5 rounds at 50,[pic included],then went to 100,after firing about 10 rounds at 100,then I just went to playing on steel,consistantly hitting at 100 and 200 yards,very accurate and very satisfied....Great job,PSA.....will be buying aother lower for this upper.
August 16, 2018
2 weeks ago
Awesome upper! Fit & Finish are excellent!
User submitted image
Added Aug 12, 2018
August 12, 2018
1 month ago
Really great quality. Can’t beat made in the U.S.A. Haven’t had a single problem with it. I bought the NiB BCG with it and all together pretty good. Definitely would recommend for the price.
July 14, 2018
2 months ago
I strongly Reccomend this Upper
Great Value for the money. Fit & finish are excellant. I put a set of UTG flipup sights on it and had it zeroed at 25 yards in 6 shots
July 18, 2017
Upper Barrel Gas system ****Great*** M-LOK handguard ***** not so good****
I received the upper and was impressed with the quality however it was a little heavy. I put a set of flip up sights on it on each end of the PICRAIL. It shot well and functioned flawlessly....until...The M-LOK hand guard fell off after about 40 rounds????? I took it home and put it back together getting the clamp on the bottom very tight. The point of aim was now too low as the hand guard was now 1/8" higher on the end . I called PSA and they took it back and sent another one. I put that one together took it to the range and after 30 rounds the hand guard fell off. I called PSA they said to sent it back I sent it back with a long letter describing the problem. when I got it back they had over tightened the hand guard and it was 1/8" high on the end just like the last one. I tried to call them but could not get through today. The M-LOK handguard will be OK if you are using optical sights attached to the lower only but don't use it for your front fixed sight.

In PSA's defense their customer service is great quick turn around etc. I am going to contact them next week and see if I can swap parts around to get a A2 type front sight that attaches to the barrel and a shorter freefloat or conventional hand guard.
July 7, 2017
Excellent upper for the money
I will start off by saying I have not shot mine yet but was impressed enough with it to want to write a review. I have ordered several uppers from PSA including a 223 Wylde and I have to say their uppers are the best you can get for the money. I put them up against my Colt 6920 and they are just as accurate and function flawlessly. I have always received my orders within 5 days and you always get what is advertised. The upper looks great and is light weight. You will not be disappointed in it. I'm ready to go shoot mine. PSA is a top quality company as far as I'm concerned and have good deals.
March 25, 2017
Can't go wrong here
This is a great upper!!! I looked for days at uppers and finally decided on the PSA 300 and I'm super glad that I did great product !! And I order it on Monday and was delivered on Wen. Thanks
March 15, 2017
2" Group @ 50 yds with cheap ammo and a 20 dollar red dot
The summary says it all....

One issue I had: after 150 rounds the handguard came loose and started walking forward on the receiver nut. Easy fix hasn't happened again since I tightened the screws. This upper is a good quality upper at an attractive price.

March 14, 2017
300 BLK upper
The 300 BLK upper assembly arrived quickly and was packaged exceptionally well much better than other companies I have ordered from. After a quick cleaning I installed it and took it to the range and was not disappointed by any means. This shot great groupings at 100 yards and was extremely accurate. Great job PSA!
March 1, 2017

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