PSA 8.5" Pistol-length 5.56 NATO 1/7 Nitride 7" Lightweight M-Lok Upper with BCG & CH - 5165450466

More Views

PSA 8.5" Pistol-length 5.56 NATO 1/7 Nitride 7" Lightweight M-Lok Upper with BCG & CH - 5165450466


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: 5165450466
UPC: 5165450466
MFR#: 5165450466

Barrel Length: 8.5"
Gas System: Pistol Length
Barrel Profile: Heavy
Barrel Steel: 4150V 
Barrel Finish: Nitride
Chrome Lining: None
Muzzle Thread: 1/2x28
Chamber: 5.56 NATO
Twist Rate: 1:7
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: M4
Handguard Type: PSA 7" Lightweight M-Lok Free Float Rail
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-Auto
Charging Handle Included: Yes
Overall Length: 17"

Add To:

Barrel: 8.5" Chambered in 5.56 NATO, with a 1:7 twist rate, M4 barrel extension, and a pistol length gas system.  This nitride barrel is finished off with a PSA 7" Lightweight M-Lok free-float rail, .750" diameter 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: 5165450466
SKU 5165450466
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: 5165450466

Questions and Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 7 questions Browse 7 questions and 11 answers
Why is there no picture of this item posted?
Nathaniel J on Jan 31, 2019
How many M-Lok slots are there at the bottom of the handguard?
Mr. Y on Apr 8, 2019
I’m just wondering what type of four grip can be attached to this upper thanks?
Buddy T on Feb 14, 2019
BEST ANSWER: No vertical grip can be installed onto any weapon measuring under 26 inches, that starts at the crown of the barrel (without any birdcage or break on) and goes to the end of the buffer tube without the stabilizer/brace extended. Assuming you're running something like a shockwave, you'd be sitting at around 24 inches total. In order to use a vert. You'd need a 10.5 in. barrel.

You can use any angled grip or hand stop if you want with this 8.5 inch barrel without restriction, however.
is this fully complete nothing else needed for the upper?
Leviticus R on Apr 17, 2019
How many inches is it from the barrel to the buffer tube? I was trying to see if I can put a vertical forgrip on this?
ThatOneGuy on Jul 15, 2019

Please make sure you are update on all laws and regulations regarding this. The ATF recently released a new memo on this. We can not give an overall length unless we have the exact lower matched up with the upper.

Best Regards,
(Name of Employee Removed)
Palmetto State Armory Customer Service
Are the larger diameter holes on the sides QD sling attachment points?
Mr. Y on Apr 8, 2019
BEST ANSWER: Yes. They are QD attachment points.
Does this chamber .223 as well?
Rabbit on Mar 25, 2019
BEST ANSWER: You can shoot .223 out of a 5.56 x 45 NATO. So YES. You cannot go the other way, though. Most Barrels on an AR - 15 style platform are 5.56 anyway.


4.9 / 5.0
8 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Good piece of kit
No problems so far, several hundred rounds through it, minimal cleaning, my "go to" upper.
July 16, 2019
3 months ago
Quality at a decent price.
Built an ar pistol. This whole upper is baller. Absolutely love it. I'm usually not cheap on parts but for a quick pistol build I wasn't planning anything over the top. This upper worked out perfect.
Mind the scratches.
Mind the scratches.
June 17, 2019
3 months ago
Make SBR a Convertible!
I own a CMMG Banshee SBR in .300 blackout. I purchased this upper from PSA and had it ceracoated to match the Banshee. Now I have a "Convertible!"

I can now shoot 5.56 or .300 depending on my mood.

Great product for a great price!
CMMG Banshee with PSA 8.5" 5.56 upper.
CMMG Banshee with PSA 8.5" 5.56 upper.
June 15, 2019
3 months ago
Works beautifully. What a deal! Took awhile for them to ship but I'm betting it's because of the high demand.
June 7, 2019
4 months ago
May 20, 2019
5 months ago
Its well built. I love the m-lok design.
May 10, 2019
5 months ago
Runs Great with LAW TACTICAL folding brace
Ran 75 rounds of both brass Federal 55gr FMJ and Wolf steelcase JHP. Federal ejected at 1 o'clock while the Wolf ejected at 3-4 o'clock. Used standard carbine weight buffer system. NOTE: The Law Tactical Folding Brace has a SPACER that ADDS total weight to the buffer system. Without the LAW Tactical folder, a H1
buffer system will be perfect!!!! Got 2.5 inch groups at 25 yards but did not care!!! Only care after 500 rounds. Bottom Line: Cycles great with a variety of ammo.
April 20, 2019
Very pleased with this pistol upper
The upper is fantastic I wish they would include a picture with this item but I was very pleased when I received it put it on spikes tactical pistol lower and it fits great
User submitted image
Added Feb 6, 2019
February 6, 2019
6 months ago

Customers Who Viewed This Item Also Viewed