12 inch carbine length ar-15 upper barreled upper assembly

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PSA 12" Carbine-Length 6.5 Grendel 1/8 Nitride 10" Lightweight M-Lok Upper - With BCG & CH - 5165449195


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 www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).

SKU: 5165449195
UPC: 5165449195
MFR#: 5165449195

Barrel Length: 12"
Gas System: Carbine-length
Barrel Profile: A2 Style
Barrel Steel: 4150V Chrome Moly
Barrel Finish: Nitride
Chrome Lining: None
Muzzle Thread: 5/8-24
Chamber: 6.5 Grendel; Type 2
Twist Rate: 1:8
Barrel Extension: M4
Diameter at Gas Block: .750
Gas Block Type: Low profile adjustable gas block
Muzzle Device: A2 Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: M4
Handguard Type: PSA 10.5" Lightweight M-Lok Free Float Rail
Bolt Carrier Group Included: Yes
Bolt Steel: 9310, Nitride Coated
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes

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Barrel: 4150V chrome moly steel. Chambered in 6.5 Grendel, with a 1:8 twist, M4 barrel extension, and a carbine-length gas system. The barrel is nitride treated and finished off with a PSA 10.5" Lightweight M-Lok free float rail, .750 adjustable gas block, and A2 flash hider.

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

Bolt: Full-auto profile bolt carrier group. 9310 steel bolt, Shot Peened, Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked Per Mil-Spec. 8620 steel M-16 profile carrier is nitride treated.

SKU: 5165449195
SKU 5165449195
Department Uppers
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Unit Price N/A
Youtube Video No
Free Shipping? No
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 5165449195

Questions and Answers

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Browse 12 questions Browse 12 questions and 16 answers
Who makes the barrel? I just got the stainless upper and would like to get a 4150v barrel also.
Jacob R on Aug 25, 2018
BEST ANSWER: PSA. Watch this video on youtube. Search "Our Story Palmetto State Armory" and watch the 4:56 video on youtube and this will help answer this question.
does this work on a standard 5.56 lower receiver?
Jason B on Oct 2, 2018
What's the instructions for the gas block?
Randy on Dec 14, 2018
So to comply with Federal NFA regulations, regarding barrels less than 16" we're gonna need something along the lines of a SBA3 Lower to complete the build & be in compliance? Am I understanding that correctly?
Tim B on Oct 3, 2018
BEST ANSWER: Correct. Any stabilizing brace or just a pistol buffer tube will keep you within the current laws of the land in most states (check your local restrictions if you live in a liberal state). The SBA3 Brace is really nice.
what type of magazine is required ?
Willie W on Sep 8, 2018
BEST ANSWER: E-lander, C-Products & ASC make 6.5 Grendel Magazines. A quick google search will yield lots of info on the different manufacturers and their quality.
Will mid length triangular handguards fit over the gas block of this upper?
Joe C on Apr 15, 2019
what thread size is the muzzle device?
tzepp89 on Oct 19, 2018
BEST ANSWER: Muzzle Thread: 5/8-24. It's stated above.
What feet per second are people getting out of this barrel?
Randy on Dec 14, 2018
BEST ANSWER: Im getting 2200 to over 2400 fps using 100 to 123 gr factory ammo.
Are these barrels dimpled under the gas block set screws?
Jordan T on Apr 3, 2019
Can I substitute this PSA barrel for a longer, match grade one and expect no issues with install or functioning?
Chris on Oct 18, 2018
BEST ANSWER: Yes, it is an easy swap providing you have the right AR-15 tools, a vice and upper receiver vice block. You will probably also need to purchase a rifle length gas tube as the match grade barrel you purchase will likely have the gas port at rifle length.
Has anyone used a Juggernaut Tactica lower with this upper, if so how is the fit?
Nick Fierro on May 23, 2019
BEST ANSWER: I have mine on a PSA lower so I am not much help. How does yours shoot ??? Accurate ????
Does this come fully put together or do you have to assemble it yourself?
BoahSnake on Nov 26, 2018
BEST ANSWER: It comes fully assembled.


4.0 / 5.0
30 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
hog gun
Put this on a PSA ept Pistol Lower and upgraded mag release, safety, and a bunch of other stuff, 1" groups at 100yds with red dot gonna get a scope for 400 yds but mostly will use for pigs in Texas.
June 23, 2019
3 months ago
Very good for the money.
It’s shoots really good. Five shots at 100 cover with a quarter. I’m not sure about the gas block. I’m putting a silencer on this week so we will see how good the gas block is.
June 16, 2019
3 months ago
PSA 12" 6.5G Is My Introduction to 6.5 Grendel
I ventured into the 6.5 Grendel realm by acquiring the PSA 12" Grendel upper. I use Wolf 100 grain ammo only. At 100m I am shooting 2 MOA or better. To keep this short I find the PSA Grendel upper to be free of any issues. IMO the 6.5G cartridge should be the issue caliber of all DoD long arms and LMGs.
May 31, 2019
4 months ago
I like it but.....
Need to find ammo that will shoot accurately in it !!!
May 23, 2019
10 months ago
Great deal
Great deal for a complete upper. Everything is to spec, no complaints from me.
May 12, 2019
5 months ago
I ordered my psa upper in February and got it by March after shooting the gun with their barrel break in procedures I could not hit anything the best group at 50 yards was a foot and a half ! I called and sent it in took them over a week to replay and not it’s been over a month since they got my upper back to inspect it ! Iam disappointed with the serving and the product psa has offered me ! It asks me to put a photo of the gun for review but I can’t because I still don’t have the gun !
May 3, 2019
5 months ago
PSA 12" Carbine-Length 6.5 Grendel 1/8 Nitride 10" Lightweight M-Lok Upper - With BCG & CH -
Best AR style pistol! Nitride looks better than stainless along with the fit and finish, it's excellent! Highly recommend! Wait for a good PSA sale before buying!!!!! MOA accuracy out to 100+ yards. 6.5 Grendel is far superior than 5.56 no matter which barrel length you use. Get a good (southern precision) muzzle brake because if using a shockwave blade....and a t-shirt, you will get bruised!
April 4, 2019
7 months ago
Great for Grendel pistol build
This thing worked right outta the box with Anderson and Spikes lowers.
Shoots pretty tight too.
Great all purpose AR pistol upper
March 26, 2019
6 months ago
Not the PSA I'm used to
Just got my upper in today. I noticed the flash hider was on so tight that it actually started tearing into the crush washer, thin metal shavings are protruding in between the crush washer and the flash hider. The hex screws in the hand guard were loose, I tightened and applied loctite. The upper reciever itself does not seem milspec and is missing forging marks; it is a few mm thicker when I compared to all my other uppers. I noticed the receiver was off when I went to put my pof rattler charging handle in it and it took some force to get it in. When I went to put the upper on my anderson lower, my bad lever was engaged; making it so when I pulled the bolt back it would lock the bolt to the rear. Again pointing to the fact that this receiver is out of spec because it was so thick it engaged my bad lever. Dont get me wrong, the upper fits on a lower I just had to take my bad lever off my lower. Also the anodizing on the dust cover was crystallized. I love PSA but not impressed with this upper cosmetically. I will see how it shoots to if i would like to return it. I will update my review after i visit the range.
User submitted image
Added Mar 15, 2019
March 15, 2019
Love the upper and really love how cheaply I got into a pretty tricked out 6.5 G (pistol).
I was looking to build a short barreled 6.5 Grendel, found this upper at a price point to good to pass up.
love the nitrated barrel and that it came with a adjustable gas block.
I did some parts swapping to turn it into what I wanted.
I replaced the handguard with a 12"er and swapped the bolt over into a light weight BCG and gave it a good muzzle brake.
December 20, 2018
9 months ago

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