PSA 8.5" Pistol-length 5.56 NATO 1/7 Nitride Barrel and 7" 2A Armament M-Lok Rail - No BCG or CH - 516445166

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PSA 8.5" Pistol-length 5.56 NATO 1/7 Nitride Barrel and 7" 2A Armament M-Lok Rail - No BCG or CH - 516445166


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.

SKU: 516445166
UPC: 516445166
MFR#: 516445166

Gas System: Pistol-length
Barrel Profile: A2 Style
Barrel Steel: Chrome Moly
Barrel Finish: Melonite
Chrome Lining: None
Muzzle Thread: 1/2-28
Chamber: 5.56 NATO
Twist Rate: 1 in 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
Hand guard Type: 7" 2A Armament M-Lok Rail
Bolt Carrier Group Included: No
Bolt Steel: N/A
Bolt Carrier Profile: N/A
Charging Handle included: No
Overall Length: 17"

Add To:

Barrel: Chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a pistol gas system this barrel features a melonite finish for accuracy and durability. It is finished off with a 7" 2A Armament M-Lok 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. Featuring machined T marks, and a mil-spec finish. These uppers are made for us right here in the USA by a mil-spec manufacturer.

Each upper is assembled to order with care, and test fired.

BCG & Charging Handle Not Included



SKU: 516445166
SKU 516445166
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
SKU: 516445166

Questions and Answers

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Browse 3 questions Browse 3 questions and 8 answers
Can this be used with a standard carbine buffer spring and buffer?
Tom1365 on Apr 26, 2018
BEST ANSWER: This comes with a standard gas block. I would highly suggest you replace it with an adjustable as for me
it was quite over-gassed. I started with a standard spring and H buffer and it pretty much threw the brass
out at about 2 o'clock with a very harsh recoil. I installed an adjustable block with the same spring and buffer.
After tuning, it really helped the system function with brass at about 3:30 and much smoother recoil.
Can this be shipped to California?
Loren F on Apr 20, 2018
Will this cycle both 5.56 and 223?
Racerxmccoy on Apr 20, 2018
BEST ANSWER: Yes, I have run both through this upper with no problems.


4.9 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Very nice will buy another upper
June 28, 2018
4 months ago
Quick shipping good service
Shoot’s great
Shoot’s great
June 22, 2018
5 months ago
Solid , not junk!
Fit perfect, easy to assemble, good quality 😊
June 20, 2018
5 months ago
Good quality. Waiting for better price on the 6.5 Creedmoor!
June 18, 2018
5 months ago
Nice compact upper for the price
Mounted this upper on new PSA AR15 COMPLETE MOE EPT SBA3 LOWER. This makes a handy compact pistol with enough length of pull to shoot comfortably. Pistol length gas seems OK with no failures to feed or eject. I did notice most ejected cases were closer to 1-2 o'clock position rather 3-4 o'clock. I'm going to try a heavy buffer to see if that makes a difference. I like the slim hand guard and overall fit and finish.
8.5" 2A Armament Pistol build.
8.5" 2A Armament Pistol build.
June 18, 2018
5 months ago
Would highly recommend if you only need the barrel! Was the first part of my first gulf and I'm more than happy! The quality is great the look is amazing. Great purchase!
May 30, 2018
4 months ago
I love this upper! I paired it with a PSA lower build kit and put a PSA bolt carrier group in it and it shoots well.
May 25, 2018
4 months ago
favorite pistol upper
put this upper with psa lower with sbpdw stabilizing brace this upper shoots very accurate would buy again great product.
May 21, 2018
5 months ago
Pistol length upper
After buying a 16" rifle from PSA and loving it I wanted a shorty. Great price and shipped quickly. I'll buy the matching lower next time.
April 30, 2018
4 months ago
Great Midsize Pistol upper!
You usually have to choose between 7" or 10.5" barrels for a pistol build. The 8.5" comes in as the perfect compromise. All quality parts and a nice light weight hand guard. The only drawback for me was the standard gas block on this pistol barrel caused over gassing. I replaced it with an adjustable and got it running much smoother. Otherwise a great upper!
April 27, 2018
10 months ago

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