PSA 10.5" Pistol-Length 300AAC 1/8 Phosphate 2A Armament 10" M-Lok Upper -With BCG & CH - 5165449871

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PSA 10.5" Pistol-Length 300AAC 1/8 Phosphate 2A Armament 10" M-Lok Upper -With BCG & CH - 5165449871


Quick Overview

free shipping Free Shipping applies to this item only and not the entire order.

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: 5165449871
UPC: 5165449871
MFR#: 5165449871

Barrel Length: 10.5"
Barrel Profile: Heavy
Barrel Steel: Chrome Moly Vanadium
Barrel Finish: Phosphate 
Chrome Lining: No
Muzzle Thread: 5/8-24
Chamber: 300 AAC Blackout
Twist Rate: 1:8
Barrel Extension: M4
Diameter at Gas Block: .750
Gas Block Type: Low-profile
Muzzle Device: A2 Style Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: A3
Handguard Type: M-Lok 10" Free Float Rail
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Overall Length: 19.5"

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Barrel:  10.5" Chrome Moly vanadium steel, phosphate coated and chambered in 300AAC Blackout with a 1 in 8" twist rate. pistol-length gas barrel is finished off with a 2A Armament 10" M-Lok Rail, a low profile gas block and an A2 Style Flash hider. 

Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized black for durability. 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: 5165449871
SKU 5165449871
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
Free Shipping Qty Label N/A
Free Shipping Qty N/A
SKU: 5165449871

Questions and Answers

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Browse 5 questions Browse 5 questions and 2 answers
I am using a Gem-tech One suppressor. I would like to replace the muzzle brake with the quick attach break later on. Will the suppressor be able to fit without the rail getting in the way?
Brad G on Oct 22, 2018
BEST ANSWER: It should, it's a 10 inch rail with a 10.5 inch barrel.
Does anybody have any real world data on direct mount or QD suppressors that are compatible with this complete upper? I want to purchase something but don't want to waste my money on something that turns out not fit. The nut on my factory mounted flash hider is inside the hand-guard and I know it is going to be a tight fit. Of course, my upper came from PSA with about an 1/8" gap between the receiver and the hand-guard. I do not think it was installed properly.
Aaron S on Dec 18, 2018
What is the internal diameter of this free float handguard?
Ronald B on Nov 16, 2018
will this fit on any complete lower ?
shaner79 on Nov 6, 2018
BEST ANSWER: Yes it will fit on any mil-spec lower.
Will this fit my PSA SPACE FORCE LOWER???
Thomas B on Nov 17, 2018


4.9 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Good quality upper
Seems very well made, and looks like every other high quality upper I’ve seen. The rail is nice, but does have some sharp edges along the top. However, good and strong. First 100 rounds feed with zero issues. Used a combination of 147 and 110 grain bullet. Very good value for the money.
May 3, 2019
Another great product from PSA!
This was an awesome purchase and I love my PSA 300 BLK!
User submitted image
Added Feb 15, 2019
February 15, 2019
7 months ago
Well built, functioned flawlessly. Paired it with a Palmetto pistol lower. Dropped in perfectly and ran smoothly from the first round on.
I recommend this upper for any pistol build.
February 3, 2019
6 months ago
Great product and price!
January 26, 2019
7 months ago
2A 300 10.5" Blackout Upper
Love the 2A 300 upper. My first 300 Blackout build and I couldn't be any happier. Quality and price are on point.
December 31, 2018
7 months ago
Pleased with Purchase
Fit very well to PSA lower, tight with no rattle. Held a good group at 50 yards with 150gn bullet.
December 29, 2018
7 months ago
Excellent 300BO complete upper.
Excellent 300BO upper for my pistol build. I would buy it again in a heart beat.
December 24, 2018
8 months ago
Great bang for your buck
Was a little hesitant at first just because of the cost compared to big named brands but so glad I decided to buy it. I'm so happy with the quality and build of it that I went and bought another PSA upper to build another. Definitely recommend this buy.
User submitted image
User submitted image
December 9, 2018
7 months ago
I really love this weapon. It’s lightweight easy to handle little to no recoil.
December 8, 2018
7 months ago
a great product for the price
I mounted this to a PSA pistol lower without any problems. very slight wiggle at best. Quality is as good as most all other PSA products. Has operated flawlessly. Would recommend and buy from PSA again.
December 6, 2018
7 months ago

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