ar-15 barreled upper assemblies

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PSA 18" Rifle-Length 6.5 Grendel 1/8 Stainless Steel 15" Lightweight M-Lok Upper - With BCG & CH - 5165448774

In stock

Special Price $ 369.99

Regular Price: $ 419.99

Quick Overview

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: 5165448774
UPC: 5165448774
MFR#: 5165448774

Barrel Length: 18"
Gas System: Rifle-length
Barrel Profile: A2 Style
Barrel Steel: 416R
Barrel Finish: Stainless Steel
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 15" 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
Overall Length: 24.5"
Weight as Configured: 4.2lbs

Add To:

Barrel: 416R Stainless steel. Chambered in 6.5 Grendel, with a 1:8 twist, M4 barrel extension, and a rifle-length gas system. The barrel is finished off with a PSA 15" 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: 5165448774
SKU 5165448774
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: 5165448774

Questions and Answers

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Browse 16 questions Browse 16 questions and 13 answers
Is there any guarantee that the 6.5 Grendel holds 1 MOA or better group?
Jeremy H on Nov 14, 2018
BEST ANSWER: There's no guarantee you can even shoot 1 MOA.
Who is the barrel manufacturer?
Joseph on Aug 8, 2018
BEST ANSWER: PSA makes these barrels in house
Will this upper function with any regular psa ar15 lower?
Hollis S on Jul 18, 2018
BEST ANSWER: Hey Hollis S., I will say YES.... Because IF You read the UPPER Description you see (Copy & Pasted For You and UNBelievable 12 more peps??) 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.
I HOPE this HELPS!...???????????? LOL
Who manufactures the barrel for this upper?
George G on Aug 1, 2018
Will this fit and function when installed on Ruger SR-556? I need this to be confirmed before making purchase.
GregT on Jul 14, 2018
BEST ANSWER: Yes. You will need to use a Grendel specific magazine though. Elanders are good
What is the expected barrel life? I keep hearing that the Grendel barrel life is not very good.
Gary G on Sep 20, 2018
BEST ANSWER: I would suspect that what you’ve heard reflects more on the barrel than the round.The 6.5 Grendel is a low velocity round and should get better life than a 308. Happy shooting!
Can I purchase with a bull barrel instead of with the flash hider? Non threaded...for NYS purposes.
Chris on Oct 8, 2018
Is this a type 2 upper?
Kelvin M on Oct 3, 2018
BEST ANSWER: Yes. Stated in specs under “chamber”
What is the difference between this and the other 18" Grendel upper w/ SKU ending with 9160 ?
Skylar on Oct 3, 2018
BEST ANSWER: The 774 has a full length rail on the top of the handguard where as the 9160 has a short length of rail on the front and rear. That and 50 bucks. The handguard looks like the only real difference I see.
Is this a gen 2 bolt and barrel?
Brian L on Oct 13, 2018
BEST ANSWER: Yes, type 2
With the 6.5 Grendel complete upper having a rifle length gas system, do you have to use a rifle length buffer setup?
Decarlos B on Jun 12, 2019
BEST ANSWER: I can use a rifle length gas system on a carbine buffer setup...and a carbine gas system on a rifle buffer setup in 5.56 without issues.
Why won't my negative review show up in the reviews?
Joel H on Mar 26, 2019
BEST ANSWER: What issues are you having with your upper
What buffer are people using to get this to work on a carbine length buffer tube and spring? H2?
Bammmm on May 17, 2019
Will this work on m&P 556?
Sandman on Oct 11, 2018
Is this bcg and barrel gen 2 ?
Mark P on Oct 10, 2018
BEST ANSWER: Yes. Stated in specs under “chamber”


4.7 / 5.0
32 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
The 6.5 Grendel upper fit perfectly on my Ruger AR-556. Once I got the gas block adjusted it shots reliably and under 1" with three shots at 100 yards. Using factory and hand loads.
The customer service was great in showing me how to adjust the gas block.
I have shot it over 200 rounds.
I would recommend this upper to anyone interested in the Grendel.
August 16, 2019
2 months ago
6.5 Grendel upper.
I have built several 6.5 Grendels and have found the PSA ss barrels to be as accurate or more accurate than other barrels of this same caliber. (Only one other matched the accuracy.) All of my personal barrels are the PSA ss 18 & 20 inch.
July 2, 2019
2 months ago
Great 6.5 Grendel upper
Very impressed with this upper. Looks great, and pleased with the accuracy. It's been a fantastic upper so far.
May 18, 2019
6 months ago
Great so far
Took it out for the first time today. Planning on using this as a hunting rifle more than a target gun. Put 60 rds of Wolf through it with mediocre accuracy. Switched to 120gr Fusion and it started to tighten up. My last 3 shots @ 100yds were less than .5 MOA with the Fusion Ammo. I can't ask for more and look forward to my 10yr old getting his first caribou with it this year!
120gr Fusion @ 100yds
18" upper with PSA lower, Minimalist stock, CMC Flat trigger.
May 3, 2019
4 months ago
Would highly recommend
Awesome upper, very accurate.
April 6, 2019
6 months ago
Overall very pleased with my purchase and would recommend
Product was shipped quickly and packed well. Very happy with with quality and condition I received it. I have only put 15 rds through it but it has performed flawlessly so far. Would have given it 5 star but since I haven’t put in the range time to fully test accuracy I’m going with 4 for now.
February 26, 2019
7 months ago
Excellent product. I will buy more Palmetto State ar15 upper and lowers. I highly recommend this product.
This upper was very accurate, and reliable. The finish is well done. The forearm is very sturdy, and looks nice as well. I really enjoy this ar15 upper.
February 25, 2019
7 months ago
Good (for the money) hornadys sst shoots terrible. Hornady black shoots better.
For the money it's a nice upper. Shoots Factory hornady sst like garbage. 5 shots 1.5/2 inch groups. Shoots eldm black at 1.85 5 shot but without flyer the other 4 were at .70. Those two factory loads are all I've tried. Using bags up front and rear in prone at 100 yards. Swfa ss 10x scope. Swfa ssalt mount. Standard trigger, LaRue on the way. Will try to load some 129 interlock for it, and maybe Sierra pro Hunter 120s. If the Sierra won't shoot, nothing probably will. Functions correctly in the 80 rounds I've shot. I don't recommend the sst as a lot of people on say they have trouble w it also. To shoot dime size groups I may have to re barrel to something else.
Eldm was tight without the flyer. Seems a always have one that strays. Read the whole review.
Eldm was tight without the flyer. Seems a always have one that strays. Read the whole review.
February 17, 2019
8 months ago
Accurate, nice finish, reliable
MOA accuracy, very nice fit and finish, fits perfectly on my Anderson lower. Not sure what more you could ask for at this price point. All other Grendel uppers cost considerably more.
February 9, 2019
8 months ago
6.5 Grendel
I’ve taken 2 deer this season with my 18” 6.5 Grendel at a little over 100 yards love this gun.
January 27, 2019
8 months ago

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