barreled upper assemblies ar-15

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PSA 10.5" Carbine-Length 5.56 NATO 1/7 Phosphate 12" Slant M-lok Upper - With BCG & CH - 5165448745


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.

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: 5165448745
UPC: 5165448745
MFR#: 5165448745


  • Barrel Length: 10.5"
  • Barrel Profile: A2
  • Gas System: Carbine-length
  • Barrel Steel: 4150V Chrome Moly Vanadium
  • Barrel Finish: Phosphate 
  • Chrome Lining: No
  • Muzzle Thread: 1/2-28
  • Chamber: 5.56 NATO 
  • Twist Rate: 1:7
  • Barrel Extension: M4
  • Diameter at Gas Block: .750
  • Gas Block Type: Low-profile
  • Muzzle Device: Palmetto State Armory Fluted Flash Can
  • Receiver Material: Forged 7075 T6
  • Receiver Type: M4
  • Hand guard Type: PSA 12" Slant End M-Lok Rail
  • Bolt Carrier Group Included: Yes
  • Bolt Steel: Carpenter 158
  • Bolt Carrier Profile: Full-auto
  • Charging Handle included: Yes
  • Overall Length: 21"
  • Weight as configured: 3.45 lbs.

Add To:

Barrel: 10.5" 4150V Chrome Moly vanadium steel, phosphate coated and chambered in 5.56 NATO with a 1 in 7" twist. Carbine length gas barrel is finished off with a PSA 12" Slant End M-lok Rail, a low profile gas block and a Palmetto State State Armory Fluted Flash Can.

Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized black for durability. Featuring a mil-spec finish, these uppers are made for us right here in the USA by a mil-spec manufacturer.

Flash Can: Palmetto State Armory's new Fluted Flash Can! This is a solid 6061 aluminum device that is designed to direct muzzle gases and the muzzle flash forward. Threaded 1/2-28 for 5.56 NATO. Black mil-spec hard anodizing. THIS DEVICE IS NOT DESIGNED TO REDUCE RECOIL, MUZZLE RISE, OR FLASH SIGNATURE. This device is designed to direct gasses and noise forward away from the shooter and enhance the weapon's appearance.

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: 5165448745
SKU 5165448745
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: 5165448745

Questions and Answers

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Browse 3 questions Browse 3 questions and 5 answers
Why is this the ONLY 10.5" upper with this really amazing looking handguard and also the ONLY 10.5" upper that has a phosphate barrel instead of nitride? I would gladly pay a bit more for something with both this handguard and a nitride barrel, but I'm not super motivated to buy a complete upper and then immediately swap barrels.
Crankston S on Jul 12, 2018
BEST ANSWER: Just adding that it would be ideal to be able to buy this beautiful rail separately as well...
Can you ship an AR pistol upper receiver to California?
Wayne M on Jul 11, 2018
What is the inside diameter of the rail? Curious for attaching suppressors or blast shields
Michael B on Nov 1, 2018
BEST ANSWER: 1 3/8' I.D.


4.8 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
I recommend this upper, I do wish that the handguard was bigger sense it does get warm real fast.
User submitted image
User submitted image
January 24, 2019
10 months ago
Great Upper
Fantastic upper. Would use again for another build
User submitted image
User submitted image
January 15, 2019
10 months ago
Very nice
I really like the handguard with the smooth area on top, it does not chew up my hand. I wish it had a nitride barrel for durability and to match the finish on the handguard. 100 rounds so far and it was 100% reliable with a H3 buffer. The chamber is on the snug side but no problems so far.
December 20, 2018
11 months ago
Excellent Value
I built an SBR with this upper and am impressed. It has functioned flawlessly for about 750 rounds and is remarkably accurate with inexpensive XM193. The muzzle device makes shooting bearable for the shooter.
November 18, 2018
11 months ago
psa 10.5"
great deal for the money
September 30, 2018
1 year ago
It's a sweet defensive tool.The trigger is so much better than my others,it makes them jealous!
September 12, 2018
1 year ago
Great Value
Terrific design. I like these new slimmer M-Lok rails and the anti-rotation tabs.

I did remove the cross bolts and applied Loctite 242 to the threads as a preventive measure. Not necessarily needed, but cheap insurance for bolts that I don’t particularly want to lose.
Daniel Defense fixed sights | LaRue Tactical MBT | SB Tactical PDW pistol brace | Magpul plastic
Daniel Defense fixed sights | LaRue Tactical MBT | SB Tactical PDW pistol brace | Magpul plastic
September 7, 2018
1 year ago
Good quality parts! Love the fit and finish.
Love it!!!! A few little extras in the lower and it’s a gem.
August 20, 2018
1 year ago
Beautiful upper
Fit like a glove. already looking at my next build
August 19, 2018
1 year ago
blem? blem? what blem?
Shipped super quick, couldn't find the blem. What a great deal.
August 16, 2018

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