Due to higher than average order volume, please expect shipping times to be delayed up to 10 business days. Please expect longer wait times for Serialized items (FFL required).
Due to higher than average order volume, please expect shipping times to be delayed up to 10 business days. Please expect longer wait times for Serialized items (FFL required).
PSA 16" Carbine-Length M4 5.56 NATO 1/7 Nitride Dissipator Upper - Black- No BCG or CH

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PSA 16" Carbine-Length M4 5.56 NATO 1/7 Nitride Dissipator Upper - Black- No BCG or CH

TEMPORARILY OUT OF STOCK

Quick Overview

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).

SKU: 5165458111
UPC: 5165458111
MFR#: 5165458111
  • Barrel length 16" 
  • 4150V Chrome Moly Vanadium Barrel 
  • Nitride Treated
  • 5.56 Nato Chamber 
  • 1 in 7" twist 
  • M4 feed ramps 
  • Forged upper

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Once upon a time, a "dissipator" AR was created by taking a 20" rifle-length gas system upper and cutting the barrel down to 16".  This allowed the shooter to keep the long sight radius of a rifle for accuracy, but keep the carbine length barrel for maneuverability.  The proximity of the gas port to the muzzle, however, played havoc with timing and made reliability a hit or miss proposition.   Advances in AR technology have produced reliable carbine and mid-length gas systems, that can be hidden using low-profile gas blocks.  This allows for a front sight base to be pinned in the rifle position for the longer sight radius without the worry of the unorthodox gas port location affecting operation.   We use the term "mock" to differentiate our dissipator from a cut-down rifle length version. 



Barrel:  4150V Chrome Moly Vanadium Steel.   Chambered in 5.56 NATO, with a 1/7 twist, M4 barrel extension, and a Carbine-length gas system. This M4 style profile barrel is nitride treated for accuracy and durability.  Barrel is finished off with a pinned F-marked front sight post in the Rifle position with sling swivel,  rifle length handguards, and an A2 flash hider.

Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized black for durability.  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. 

Bolt carrier group and charging handle not included.

SKU: 5165458111
SKU 5165458111
Brand Palmetto State Armory
Department Uppers
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: 5165458111

Questions and Answers

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Browse 13 questions Browse 13 questions and 31 answers
How can this be a dissipator with a 16” barrel and a carbine length gas system when the sight post/gas block is so close to the muzzle? Doesn’t add up.
Christopher on Apr 27, 2019
BEST ANSWER: You clearly don’t understand the word “mock” this is a “lool-a-like”. Read up on Dissapators and then read the description again.
is the gas block pinned or is it held in place with set screws ?
ColtSP69 on Apr 30, 2019
BEST ANSWER: Not pinned. Set screws.
is the gas block pinned or is it held in place with set screws ?
ColtSP69 on Apr 30, 2019
BEST ANSWER: Set screws.
Will rifle length handguards fit this without modification to the handguard? Is the current handguard modified to fit over the carbine length gas block?
Rick's B on Aug 12, 2019
BEST ANSWER: Currently has rifle length handguards already installed, which already clear the low profile gas block at the carbine length position
Will the Palmetto State Armory Mil-Spec Carry Handle work on this F-marked front sight? Because is says compatible with taller F marked front sight bases. Also is the carry handle a color match to this upper?
Charles on May 3, 2019
BEST ANSWER: The F marked front sight base is the correct base to use with the Mil-Spec carry handle. They are just diffetentiating between the Mil-Spec front sight bases, and the non Mil-Spec bases that are out there and sometimes used.. And yes, the color on mine matched very will with the upper.
Does this have the triangle end cap and will triangle hand guards fit over the low mount gas block?
Donald M on Aug 14, 2019
BEST ANSWER: Yes, it has a triangular end cap. Can’t say with 100% certainty, but a triangular handguard should fit because the low profile gas block, at carbine length, is far enough back that it wouldn’t interfere with it’s sloping shape.
How is this a dissipator if it's a carbine???
J J on Jun 25, 2019
BEST ANSWER: Carbine-length gas system, Dissipator-style sight radius. It’s a mock dissipator, NOT a rifle-length gas on 16.5”
Is the muzzle device pinned and welded or is it replaceable?
Tristan B on Oct 20, 2019
BEST ANSWER: Not pinned and welded, the standard bird cage flash hider is held on with a crush washer, so it is easily replaceable. No need to pin and weld on a 16.1 inch barrel.
Can a forward grip be installed on this upper to make it CT legal?
Shane w on Mar 10, 2020
BEST ANSWER: There is no rail to mount the forward grip to.
What type of hangaurd will work with this upper ?
Brandon L on Jun 16, 2019
BEST ANSWER: Magpul makes hand guards for this upper as do many other manufacturers. Simpy search the interwebs.
Rifle buffer tube lenght, will it work with carbine gas system? Looking to use rifle m16 stock with carbine “dissipator”, thanks.
Carlos D on Sep 21, 2019
BEST ANSWER: Yes,
Can the front sight post be removed?
Robert B on Apr 27, 2019
BEST ANSWER: Yes
Any drop in handgaurd available?
Adam d on Nov 29, 2019

Reviews

5.0 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
12
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Great value!
Works flawlessly. Seems to like 62gr projectiles.
User submitted image
Added Feb 27, 2020
February 27, 2020
Purchased
2 months ago
BOOG
Best upper for the price. PSA...the best American company.
February 17, 2020
Beyond happy.
I purchased a "Blem" upper. The only imperfection was a very slight scratch on the A2 flash hider, which I planned to replace anyway. Other than that, the upper and the rest of my PSA (public service armaments) parts were as expected...perfect. I call them public service armaments because of the unbeatable value their products provide the American consumer. I had considered buying from other sources, just to have something else with some percieved increase In value, but that value is only in the name. There are many companies that sell the exact same or inferior quality for more money. As always, I'm beyond happy with my purchase.
February 12, 2020
Dissapator
Nice upper. I used it for my retro build. Wanted something a little different but also wanted it to be reliable so I let PSA do most of the hard work for me . It turned out great thanks to PSA.
A1 dissapator upper with PSA doing the hard part for me. Mounted up perfectly on a PSA lower .
A1 dissapator upper with PSA doing the hard part for me. Mounted up perfectly on a PSA lower .
February 9, 2020
Purchased
2 months ago
Pleasantly surprised with a quality upper
I couldn’t find any imperfections with the upper I received. It had signs of being tested from the factory which was very reassuring. Slapped in on an Aero Lower with a BCM BCG and it ran Barnaul steel at -33F flawlessly.
It is also very accurate at 200 yards.
A solid fit to an Aero Lower. Using a BCM BCG it all runs together very well.
A solid fit to an Aero Lower. Using a BCM BCG it all runs together very well.
January 15, 2020
Purchased
3 months ago
great carbine
this is a great copy of the dissapator and good adition to my collection
December 6, 2019
Purchased
5 months ago
Dissipator perfection
Accurate, mil spec, performance, cost effective, perfect for what I wanted to do. I’d recommend this to my family and friends.
December 2, 2019
Purchased
6 months ago
It's great. Kick ass!
It is what it says it is. It's great.
November 22, 2019
Purchased
5 months ago
Perfect
Works great and fits lower like a glove.
August 14, 2019
Purchased
9 months ago
Light, accurate, cool
The upper came without a bolt carry group and rear sight, so I ordered a basic full auto BCG and carry handle from PSA. The upper fit perfectly in an Aero ambi lower. It ran perfectly and shot accurately. With minor adjustments to the sights, it then shot precisely, too. The extra sight radius and the extra hand guard area really makes this carbine super cool.
August 8, 2019
Purchased
11 months ago

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