barreled upper assemblies ar-15

More Views

PSA 20" Rifle Length 5.56 NATO 1/7 Nitride 15" Lightweight Mlok Upper - W/ BCG and 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: 5165448220
UPC: 5165448220
MFR#: 516445322

Barrel Length: 20"
Gas System: Rifle Length
Barrel Profile: A2 Style
Barrel Steel: 4150V Chrome Moly
Barrel Finish: Nitride
Chrome Lining: None
Muzzle Thread: 1/2-28
Chamber: 5.56 NATO
Twist Rate: 1 in 7"
Barrel Extension: M4
Diameter at Gas Block: .750"
Gas Block Type: Low-profile
Muzzle Device: A2 Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: M4
Handguard Type: PSA 15" lightweight M-Lok rail
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-Auto
Charging Handle Included: Yes
Overall Length: 32"
Weight as Configured: 4 lbs

Add To:

Barrel: 20" Chrome-moly barrel steel chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a rifle-length gas system. The A2-style profile barrel is finished with nitirde finish for durability. Barrel is finished off with an .750" diameter low-profile gas block, PSA 15" Lightweight 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 M4 feedramp cuts, T-marks, these upper upper receivers are made for us right here in the USA.

Bolt Carrier Group: For AR15 and M16 rifles and carbines. Bolt is made of shot-peened, Mil-spec Carpenter 158® steel. Gas key is secured with grade 8 fasteners and staked. Bolt carrier is parkerized outside and chrome lined inside. Includes Charging Handle.

SKU: 5165448220
SKU 5165448220
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: 5165448220

Questions and Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 14 questions Browse 14 questions and 35 answers
Is this capable of .223 round a also?
Blake B on May 6, 2018
BEST ANSWER: This is stamped 5.56 Nato which means it can fire both 5.56 nato as well as the .223 rem. If your rifle is stamped .223 rem then it CANNOT fire 5.56 nato. Though if your rifle is stamped .223 wylde then it can fire the higher pressure 5.56 nato round.
can i get this with a muzzle break instead of a flash instead of a flash hider ?
thebob on Jun 11, 2018
BEST ANSWER: NO you will have to buy one and change it yourself.
Will this upper work with a carbine length buffer lower with collapsible stock?
Amiel G on Jun 9, 2018
BEST ANSWER: Yes it will.
Does this upper come in Flat Dark Earth?
Mike M on Jun 11, 2018
BEST ANSWER: Uppers with free floating hand guards are standard black. You would have to have it cerakoted yourself to make it flat dark earth. Only the uppers with front sight post gas blocks come in colors other than black from PSA.
Does this come with a firing pin or do I have to buy one separate?
iaf99 on Oct 15, 2018
PSA 20
PSA 20" Rifle Length 5.56 NATO 1/7 Nitride 15" Lightweight Mlok Upper - W/ BCG and CH
PSA MOE SBA3 Lower Build Kit, Black - 5165448884
PSA MOE SBA3 Lower Build Kit, Black - 5165448884
BEST ANSWER: The description says includes bcg and ch. Firing pin is part of bolt carrier group - so "yes" is the correct answer.
Is this upper available without Bcg and Ch ?
Jay H on Jul 19, 2019
Will this work with an Anderson lower?
Blake E on Jul 17, 2019
BEST ANSWER: Absolutely. I have virtually the same kit on an Anderson lower. I have sold a dozen lowers for a variety of PSA kits. Build n Shoot
is the BCG with this set up a full-auto cut or a semi-auto cut?
S G on Feb 20, 2019
BEST ANSWER: Read the description if it says Bolt Carrier Profile: Full-Auto then yes it does
Does the bottom of the barrel have a rail for a grip attachments?
Levi H on Jul 1, 2019
No. The Hand guard requires placings the Picatinny rails at the location wanted.
Truly very handy. .....................lm
And will it fit a s&w m&p 15 lower?
Charlie L on Oct 16, 2018
BEST ANSWER: Yes it will
Does this barrel have nitride inside and out?
JoMama on Dec 5, 2018
BEST ANSWER: Yes it is fully coated. Like being dipped. At least to my understanding when I purchased it.
What kind of accuracy are some of you getting out of this?
cody j on Jul 16, 2019
BEST ANSWER: This one holds around an inch, but it hasn’t been shot much yet. The fit an finish was very good too!i think a good deal for the money
Will this fit the Bushmaster 5.56 lower receiver?
Jay C on Aug 12, 2019
Can a carbine length buffer tube work on this upper? may I ask what is the length of a carbine buffer and rifle buffer? thank you guys!
Stevenson S on Jul 28, 2019


4.6 / 5.0
30 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Another Great PSA Upper
I was fortunate to snag this upper during the Freedom Week sale. Did I need it ? Of course not. Want and need are far apart. Like all the other PSA uppers I have purchased, it came nicely packaged and protected (yes, I keep the boxes, they are that nice). I wanted a dedicated bench rifle and this one will be it. Everything was in perfect condition, no scratches, dings etc. The only thing I have to do is re-align the gas block as it is off ever so slightly. So minor I bet it would cycle without issue, but the OCD in me has to make it perfect. Plus it only takes a couple minutes. Can't wait to hit the range !
The single point sling was attached for giggle purposes...
The single point sling was attached for giggle purposes...
August 1, 2019
3 weeks ago
PSA 20” upper
Put a Leupold 3 x 9 scope on it and it is a tack driver. 100% satisfied and highly recommended. Functioned flawlessly.
June 1, 2019
4 months ago
I build my AR debating whether I should go with a 16” or 29” barrel. I’m glad I showed 20” free floating barrel. Super accurate
Great barrel.. good accuracy
Great barrel.. good accuracy
May 21, 2019
4 months ago
Sighter shots only so far ,standing water on the range.function was 100%.
May 19, 2019
4 months ago
1 awesome completely satisfied 2nd no so much
The upper and lower on one have some slack and and not tight like I would expect
The 2nd is tight and perfect
I’m trying to figure it out
It a 5% difference in accuracy at 100 yards more at 150 and 200
May 6, 2019
5 months ago
It is as advertised. Functional and fits well with other parts from PSA. Only issues I found was the lack of pic rail down the top of the handguard. That's my fault though for not paying attention to description. Also, the slots in the top may look like M lock but alas they were not. Beginners mistake I guess. Still very pleased with the purchase. Would and have recommended to friends and family.
February 20, 2019
1 year ago
20” 5.56 barrel, rifle length gas system
Bought this upper for $320 everything was great. Built the lower with the rifle kit and stripped lower, cost $160 to make it complete lower. All together cost $480 to make a complete rifle functional. Added a barrel shroud with multi ported muzzle brake that looks like a suppressor, added a primary arms 4-14x44 ACSS HUD scope with a sun shade and lens covers, scope is set on UTG Hi profile scope rings.
Bought the upper and built the lower half. Cost me $480 to make the rifle complete and functional.
Bought the upper and built the lower half. Cost me $480 to make the rifle complete and functional.
February 16, 2019
7 months ago
Accurate, reliable and smooth.
Very smooth consistent function. Accuracy is excellent. If you want great ventilation for the barrel and a little weight savings, the lightweight m-lok handguard is perfect.
User submitted image
Added Nov 24, 2018
November 24, 2018
9 months ago
Super fun build! Always reliable parts
This was a really fun build. Had some of the parts cerakoted at a local shop and have had a great experience with all of the PSA products I’ve purchased!
Got some parts cerakoted and love the result!! This was definitely a fun build
Got some parts cerakoted and love the result!! This was definitely a fun build
November 20, 2018
10 months ago
Fit and finish is perfect on my PSA lower. I just got the scope mounted and look forward to getting in dialed in.
November 12, 2018
10 months ago

Customers Who Viewed This Item Also Viewed