PSA 18" Rifle-Length CHF .223 Wylde 1:8 Geissele MK13 15" M-Lok Upper - w/o BCG or CH

More Views

PSA 18" Rifle-Length CHF .223 Wylde 1:8 Geissele MK13 15" M-Lok Upper - w/o BCG or CH


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: 5165458077
UPC: 5165458077
MFR#: 5165458077
  • Barrel Length: 18"
  • Gas System: Rifle-Length
  • Barrel Profile: A2
  • Barrel Steel: Hammer-Forged Chrome Moly Vanadium ("Machine Gun Steel")
  • Chrome Lining: Yes
  • Muzzle Thread: 1/2-28
  • Chamber: .223 Wylde
  • Twist Rate: 1 in 8"
  • Barrel Extension: M4
  • Diameter at Gas Block: .750" 
  • Gas Block Type: Geissele Super Gas Block (Not Pinned)
  • Muzzle Device: A2 Flash Hider
  • Receiver Material: Forged 7075 T6
  • Receiver Type: M4
  • Hand guard Type: Geissele MK13 15" M-Lok Free Float
  • Bolt Carrier Group Included: No
  • Bolt Steel: N/A
  • Bolt Carrier Profile: N/A 
  • Charging Handle included: No 

Add To:

Barrel: A proprietary blend of Hammer forged chrome molly vanadium made by FN that is referred to as "Machine Gun Steel" by virtue of its required use in FN's M249 and M240 weapons. The hammer forging process work hardens the steel, making it more durable. In addition, the chrome process for the bore allows for a lining almost twice as thick as a standard M16 for enhanced durability. Chambered in .223 Wylde, with a 1/8 twist, M4 barrel extension, and a Rifle-length gas system. This 18" A2 profile barrel is Mil-spec phosphate coated, High Pressure tested and Magnetic Particle inspected. The barrel is finished off with a Geissele MK13 Super Modular 15" M-Lok free float rail and an A2 flash hider.

Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring T-marks, these upper receivers are made for us right here in the USA.

Rail: The MK13 is the latest entry to the Geissele line-up of Super Modular Rails. The new handguard design offers a smaller diameter and overall height to create a slimmer package. Included with the MK13 Super Modular Rail is an updated version of the proven Geissele Barrel Nut design, not only providing ease of installation but superior rigidity. The long surface contact of the 2.25” barrel nut interfaces with the receiver creating a platform that can be trusted to be straight and true the entire length of the free float rail. The MK13 is precision machined using 6061-T6 aluminum due to its strength, rigidity and lightweight properties.

Utilizing Magpul’s M-LOK technology in the 3, 6, and 9 o’clock positions and machined-in Picatinny rails at the end allow the end user to customize their rifle and securely mount lights, bipods, and other firearm accessories. The Geissele MK13 Super Modular rail is finished in a durable and long lasting Type 3 Anodized Hardcoat

Each upper is assembled to order with US-made parts, and test fired to check gas function. 

**Does not include bolt carrier group or charging handle.

SKU: 5165458077
SKU 5165458077
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: 5165458077

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 5 answers
Are these barrels available separately?
Jon B on Apr 24, 2019
Is the gas block pinned?
Frank F on Apr 24, 2019
BEST ANSWER: Based on the upper I received, NO. Set screws only. According to the Geissele's instructions for the Super Gas Block, the pin is optional but is recommended for duty weapons.
What is the weight of this upper assembly?
Bravo_Bravo on Apr 24, 2019
Is the Geissele Super Gas block installed using the two set screws only or set screws + roll pin? Geissele's installation manual says that you can do both types of installation, with the latter option called "bombproof install" and recommended for duty weapons. Also, is the barrel dimpled for the set screws, as specified in Geissele's manual?
prizrakat on Apr 27, 2019
BEST ANSWER: I talked to customer service today it the gas block is NOT pinned.
Please tell us if the gas block is pinned on these types of uppers?
Frank F on Apr 24, 2019
BEST ANSWER: PSA clearly states in the sescription that it is not pinned
Are these barrels available separately?
Jon B on Apr 24, 2019
Does the Geissele barrel nut tool come with this upper?
Wschools on Jul 8, 2019
BEST ANSWER: No, it does not come with the barrel nut tool.


5.0 / 5.0
6 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Excellent Value
This is an excellent value due to the rail alone goes for about $300, and the FN CHF barrel also goes for about $300. You are basically getting a Geissele gas block, upper receiver, and gas tube for free. This upper is light weight and very comfortable to hold. I put this on an Anderson stripped lower with a CMC lower parts kit, Ergo grip, Bravo Company 4x4 charging handle, PSA Nickel Boron BCG, PSA Nickel Boron two stage trigger, Magpul ACS-L stock and Troy folding battle sights. I am very happy with my purchase and highly recommend this upper, It is worth every penny.
18 " FN Barrel 1/8 Twist 223 Wylde Chambered
Geissele MK 13  (15" rail)
Complete rifle with Magpul ACS-L stock
July 24, 2019
4 months ago
Awesome build quality, looks great.
My new favorite upper I have. Paired with a 1-6LPVO, aero lower with larue trigger, and a bipod. It's a heavy build but so rewarding to shoot, more accurate than I am. I love the geissele handguard, the picatinny rail up front makes mounting bipods or lights super easy.
User submitted image
Added Jul 10, 2019
July 10, 2019
6 months ago
If you are experienced with 18” set ups you know this offering is at the top with any other premium brand for a great price.
You can’t get a better barrel, gas block, or hand guard. Everything was aligned correctly and torqued. I still went ahead and put lock tight on the hand guard retaining screws and the gas block screws. A correctly machined gas block with two set screws that are properly torqued will not give you any trouble. There is no such thing as a bomb proof rifle or a bomb proof person that carries it. Don’t read to many “expert” internet opinions. You will be happy and PSA will stand behind it.
June 5, 2019
6 months ago
Good Looking Tac Driver
This was my fourth PSA CHF upper and the second 18” rifle length one. Took a little over a week to get to me. The padded box that it came in was a bit more compact and attractive than in the past. First impressions were good. Everything on the upper looked straight and cleanly assembled. The desired FN roll mark on the barrel is there and very prominently displayed. There was some grease leaking from the barrel nut, which is good as it indicates that grease was used. A little carbon in the star chamber indicated that the upper was indeed test fired. I didn’t want to disassemble anything, so I have no idea whether the barrel is dimpled for the set screws or not. I’m not too worried about it as this is not my self-defense rifle. If the gas block starts moving on me, I’ll get it fixed. Hasn't happened yet with any of my FF CHF uppers though. The Geissele stuff on this upper is very nice and is a significant upgrade over the standard PSA stuff. Very attractive, light and comfortable. The design of the rail seems to make it impossible for it to rotate, which is good. Cleaning the upper reveled nothing new.

I finished the upper with parts from my old non-Geissele 18” CHF upper. Everything fit like a glove and the upper mated with my AP lower just about perfectly. I then took it shooting and put about 150 rounds through it. No stoppages of any kind and as before, 18” rifle length with an A5 buffer system made for a very soft and pleasant shooting rifle. No need for a brake here. I was getting my BUIS and scope dialed in on this new upper and the accuracy was decent but nothing to write home with Wolf Gold 55 gr. However, as I discovered with my non-Geissele upper, these 18” 1:8 twist .223 Wylde chambered barrels really shine when you feed them some heavy match grade rounds. After I got the sights close enough with the cheap 55 gr stuff, I switched to some PMC XTAC 77 gr OTM and then to some IMI RazorCore 77 gr OTM. Sure enough, my groups basically instantly shrunk in half and some were sub-MOA. After I got done zeroing and had some rounds left in the mag, I shot at some metal targets that my range has. I had no problems pinging the smallest one of the bunch every time, even when firing rapidly. The ejection patten throughout the shooting session seemed healthy, indicating no under or overgassing.

So far, I’m very happy with my purchase, look forward to many more shooting sessions with this upper and can definitelly recommend it to others. Yes, it’s quite a bit more over the base non-Geissele CHF model but considering how much the Geissele stuff costs when bought separately and how nice it is, it’s still a great deal.
May 19, 2019
7 months ago
Quality products, excellent customer service & great prices. This is why PSA is so successful!
It’s worth the money for the Geissele rail, gas block and the FN stamped barrel. Be cautious when purchasing. This is my experience with my upper purchased. The Geissele super gas block was not pinned, the 2 set screws were tightened to the barrel which was not dimpled for either screw, and no loc-tite type of adhesive was used. Customer service is currently working with me for a solution.
May 6, 2019
What more could you want?
Awesome upper. I’ve got a PSA lower with a magpul rifle stock topped off with Geissele and an ACOG. Tac driver!
April 24, 2019