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PSA 10.5" Pistol-Length 300AAC 1/8 Phosphate 9" Lightweight M-Lok Upper - With BCG & CH - 5165448418


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: 5165448418
UPC: 5165448418
MFR#: 5165448418

Barrel Length: 10.5"
Barrel Profile: A2
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: Lightweight M-Lok 9" 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"

Add To:

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 PSA 9" Lightweight 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. Bolt carrier is parkerized outside, and chrome lined inside.

SKU: 5165448418
SKU 5165448418
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 5165448418

Questions and Answers

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Browse 7 questions Browse 7 questions and 17 answers
can the flash suppressor be removed and a silencer be installed?
Brian D on May 19, 2018
BEST ANSWER: Yes. Use a 5/8-24 thread adapter - per description. (plus NFA stamp)
Is this a complete upper? So if I purchase a complete lower it would be a complete AR?
Damian on Mar 15, 2019
BEST ANSWER: Yes this is a complete upper all you need is some sort of sighting system to finish it off. Get their complete lower and you have a great pistol or SBR.
Can this be ordered with an adjustable gas block?
Kevin on May 19, 2018
BEST ANSWER: this upper only comes with a standard low profile gas block.
What is the inner diameter of the hand guard?
Austin C on Jun 7, 2018
Is the barrel an H-Bar?
Brian R on May 21, 2018
BEST ANSWER: this barrel has an .850" diameter behind gas block.
do i need some kind if stamp for this? i will buy the pistol lower too.
goldo787 on May 25, 2018
BEST ANSWER: No, as long as you are not mounting a physical buttock onto the lower.
Any reputable brace is also allowable via referencing ATF guidelines
Any recommendations for completed lower that would fit best ? I just ordered this upper
Damian on Mar 16, 2019


4.8 / 5.0
26 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great Value and Accuracy. Gas too short for Super Sonic
Very well balanced and the QD hole is great for handling.
I bought earlier model without QD hole.

Accuracy is very good and can put hole into hole with a cheap red dot at 10-25 meters.
BUT the pistol gas system on ALL 300 BLK from PSA means the extraction will happen before the chamber pressure drops to safe level the the brass shrinks again to come loose.
Over gassing the system will tear the cartridge rim and pop out primers that will jam the bolt. Adjustable gas block or heavier H3 buffer will NOT HELP.
Use ONLY SUB SONIC ammo speed or Super Sonic well below 2,000 fps.
March 19, 2019
300 blackout 10.5 upper
looks and works great love the m-lock hand guard mated it to an aero stripped lower first time at range it shot 1.75 in groups at 50 yards
January 21, 2019
4 months ago
Great upper for my 300AAC Blackout build!
This is a great value upper for my build. Put everything together and was shooting <1” 3-shot groups at 115 yards with junk factory ammo!
December 28, 2018
5 months ago
Love it. Finish one project and now ready for the next.
December 12, 2018
6 months ago
I was very impressed with the upper. It’s fit, functionality, and accuracy were superior to what I had imagined.
Very fast shipping. This was used on my low budget 80% hunting pistol. The 100 yard groups were amazing with 120grain Remington otm. This is my 10 year olds favorite gun!
100 yard groups shot by my 10 year old son.
This upper is sitting atop a Daytona tactical 80% lower with a Kak pistol stabilizer.
Custom cerakote job. I used Magpul FDE and Graphite black.
December 9, 2018
5 months ago
.300 BLK 10.5"
So far, so good. Only about 20 rounds deep; mounted 1-4x glass right away and ran several rounds from several magazines to find a reliable match to hunt with and felt confident enough to then do so with new platform almost immediately following purchase. Reliable function and groups far superior to the shotgun so that is what I went with. I feel pretty confident with the accuracy so far and am looking forward to becoming more acquainted with the rifle in its varied capacities in the near future.
November 23, 2018
6 months ago
I had to clean/degrease all the screws and apply loctite but, now the fore-end is solid and I get repeatable zero with my QD mount from Midwest Industries when removed and reattached to the same T-slot.
November 5, 2018
11 months ago
Good value/works 100%
Very satisfied with this buy. It runs subs and supers in the suppressor great.
October 21, 2018
7 months ago
Great product,speedy and reliable service.
August 20, 2018
10 months ago
This was a big surprise for me! I really like this particular item from PSA. The "heavy" barrel is really what could be the difference between somewhat accurate and very accurate at 50 to even 100 yards. It's built very well, not a loss fitting on it.
August 12, 2018
10 months ago

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