PSA 18" CHF Rifle-Length .223 Wylde 1:8 15" Geissele MK14 M-Lok Upper - No BCG or CH

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PSA 18" CHF Rifle-Length .223 Wylde 1:8 15" Geissele MK14 M-Lok Upper - No 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: 5165490773
UPC: 5165490773
MFR#: 5165490773
  • 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, Pinned to Barrel
  • Muzzle Device: A2 Flash Hider
  • Receiver Material: Forged 7075 T6
  • Receiver Type: M4
  • Handguard Type: Geissele MK14 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, a Geissele .750" diameter Super Gas Block drilled and pinned to the barrel, 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 MK14 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 MK14 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 MK14 is 3d precision machined using 6061-T6 Aluminum due to its strong, rigid and lightweight properties. 

Utilizing Magpul’s M-LOK technology in the 3, 6, and 9 o’clock positions allow the end user full customization and modularity of their rifle to securely mount lights, bipods, and other firearm accessories. The Geissele MK14 Super Modular rail is finished in a durable and long-lasting Type 3 Hardcoat Anodized

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: 5165490773
SKU 5165490773
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: 5165490773

Questions and Answers

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What is the weight of this upper?
Heath L on Aug 21, 2019


5.0 / 5.0
1 Review
5 Stars
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1 Star
Buy this while it is available!!!
First off I do want to say I would not have purchased this upper if the gas block was not pinned in place. So thank you PSA for listening to your customer base!
For those of you who have not seen or held a Geissele rail (myself included until now) this handguard is light and thinner than I imagined by viewing the photos. It looks and feels great! My interest in Geissele rails has gone from 0 to 100 real quick. I swapped the A2 flash hider with a Lantac Dragon and made this thing into a real pea shooter. The recoil is nearly non existent.
As far as accuracy I was getting sub MOA groups at 100 yards using standard 5.56 55 grain federal ball. Although I think it can do better in a rest or better shooter.
As far as buffer weight an spring I was under the impression I should use a similar buffer weight to an A2 rifle length buffer (5.4oz) because this is a rifle length gas system and boy was I wrong! Always Test your setup! I am using a JP carbine buffer spring and initially I started with an H3 buffer. Constant short stroke! I also had an H2 buffer with me at the range that day but it did not work well either as I had more short stroke issues. I came back to the range the next day with a carbine and H buffer. The H buffer worked out perfectly! I shot 4 magazines with zero failures and feel confident any issues I did have are long gone! Thought I would throw this in the review incase someone has similar issues or questions during their own build.
Long story short I have two of these uppers right now and if I could I would buy more of them. The additional couple inches in my opinion is well worth having! Additional velocity longer dwell time and that soft recoil. This is a winner! Just buy it if your on the fence you will not regret it.
Roll Mark
Pinned Gas Block
Close up side view
DMR Build
August 31, 2019
3 weeks ago

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