PSA 10.5" Pistol Length 300AAC Blackout 1/8 Nitride 9" M-Lok Upper With BCG & CH

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PSA 10.5" Pistol Length 300AAC Blackout 1/8 Nitride 9" M-Lok Upper With BCG & CH

In stock

Regular Price: $ 449.99

Special Price $ 319.99

Quick Overview

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.

SKU: 5165447909
UPC: 5165447909
MFR#: 5165447909

Barrel Length: 10.5"
Barrel Profile: Heavy
Barrel Steel: Chrome Moly Vanadium
Barrel Finish: Nitride
Chrome Lining: No
Muzzle Thread: 5/8-24
Chamber: 300AAC Blackout 
Twist Rate: 1:8
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: A3
Handguard Type: 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"

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Barrel:  10.5" Chrome Moly vanadium steel, melonite treated for durability and chambered in 300AAC Blackout with a 1 in 8" twist rate. Pistol length gas barrel is finished off with a PSA 9" M-Lok Rail, a low profile gas block and an A2 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: 5165447909
SKU 5165447909
Brand Palmetto State Armory
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SKU: 5165447909

Questions and Answers

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Browse 4 questions Browse 4 questions and 6 answers
is the muzzle device crimped or can it be easily removed to install a supressor / flash can?
marcos o on Apr 18, 2018
BEST ANSWER: It's too easy to remove. Should have been rotated another complete revolution to be tight enough. Ultimately didn't matter as I was changing it out anyway.
Is the barrel 4150 steel?
John D on May 14, 2018
BEST ANSWER: Description says Chome Moly Vanadium steel. If you want Stainless steel, they offer the stronger of the three grades of stainless used for barrels.


4.3 / 5.0
6 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
You need to know how to inspect EVERYTHING to ensure it is correct.
Overall, this is a good value if you catch it on sale like I did. I absolutely would not pay over $300 for this complete upper. The components themselves seem to be OK, more or less. My upper came without the locking tab on the handguard that prevents it from sliding off the barrel nut under recoil. My friend bought a similar upper that had a longer free float handguard, but was otherwise the same. It was missing the same part. His handguard slide an inch forward after just one magazine through the rifle. After that happened, I knew to check for that specifically when I got mine. I would highly suggest that be the first thing you check when you get any PSA rifle with a free floated handguard. It's a small piece of metal between the locking bolts on the underside of the handguard.

So, catch it on sale and inspect it thoroughly. If you have no idea how to inspect it, I suggest buying something else.
After making the tab to lock the handguard on the barrel nut, everything worked as it should
After making the tab to lock the handguard on the barrel nut, everything worked as it should
May 25, 2018
$ave $$$ vs Other Brands Quality Upper with PSA Floating M-Lok
Great value. The upper works great and the bolt is made very well and NDI passed. Aluminum M-LOK upper is PSA stamped and very good quality. I put rubber inserts for max grip.
Gas is a bit strong. Standard PSA Carbine buffer found in nearly all the lowers you can buy from PSA is NOT enough to handle 142 grain Super Sonic 300 BLK, you will have early bolt opening leading to popped primers (Armscor). Sub-sonic (Sig) that are not suppressed will have no issues at all.
For higher pressure Super Sonic 300 BLK or suppressed Sub-Sonic 300 BLK, I recommend using heavier H2 or H3 carbine buffers to slow down the bolt movement, or install adjustable gas block.
May 22, 2018
3 months ago
Great upper for the $$$. Looking for a good bolt carrier to go with it
May 21, 2018
3 months ago
Inexpensive, works as it should both suppressed and unsuppressed and was more accurate than I ever expected it would be.
This was my first complete upper purchase. I usually build them. I bought this to use as a cheap farm truck/tractor gun and range toy. I I wasn't expecting much due to the price. When it arrived I was pleasantly surprised. The finish was good with no blemishes and everything was put together right. I cleaned, oiled it, installed a QD mount for a suppressor and installed a red dot sight. I fired it with several brands of factory supersonic ammo and two brands of subsonic ammo. The upper worked flawlessly with both super and subsonic ammo, both unsuppressed and suppressed. I have to date had zero malfunctions with it. Over a rest on a good day I can get three shot groups between 1"-1/14" at 100 yards. If your looking for an inexpensive 300 blk out upper that works reliably this is a good choice. Based on this purchase I wouldn't hesitate to buy another upper from Palmetto State Armory.
May 8, 2018
3 months ago
Great upper
broke it in the other day the only thing negative i had to say about it is that the handguard wasn't screwed on tight enough so after 200 rounds it was about to fall off. It also seemed that the gas block was leaking a little bit but wasn't effecting the functionality of the upper. otherwise great build
May 6, 2018
3 months ago
Response from Palmetto State Armory
We do apologize for that. Since all of our parts and firearms are covered by our Unlimited Lifetime Warranty, if you have any issues arise from the craftsmanship of the product, we can either have select parts sent to you for you to replace, or we can have the item brought in, at no cost to you, so we can repair or replace the defective product. Please contact Customer Service so we may resolve this issue.
May 7, 2018
Casey S
Good for the price
I haven't fully broken it in yet. But I did notice the inside of the upper, and the bolt are a little rough. Physically textured. Everything functioned well, looks like the handguard was mated up straight and secure.
April 30, 2018
4 months ago

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