16" mid length barrel upper assembly

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PSA 16" Mid-length 5.56 NATO 1:7 Nitride 15" Lightweight M-lok Upper - With BCG & CH - 5165448671


Quick Overview

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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 www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).

SKU: 5165448671
UPC: 5165448671
MFR#: 5165448671

Barrel Length: 16"
Gas System: Mid-length 
Barrel Profile: A2
Barrel Steel: Chrome-Moly Vanadium
Barrel Finish: Melonite
Chrome Lining: None
Muzzle Thread: 1/2-28
Chamber: 5.56 NATO
Twist Rate: 1:7
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" M-Lok Lightweight Rail
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-Auto
Charging Handle Included: Yes
Overall Length: 24.5"

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Barrel: 16" barrel length Chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a mid-length gas system. The A2 profile barrel is finished with Melonite. 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,  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: 5165448671
SKU 5165448671
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Unit Price N/A
Youtube Video No
Free Shipping? Yes
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 5165448671

Questions and Answers

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Browse 17 questions Browse 17 questions and 44 answers
What is the total weight on this? Thanks!
Grady D on Mar 21, 2019
Does this rail have qd mounts on the opposite end of the barrel?
Christopher H on Sep 10, 2018
BEST ANSWER: QD mounts on both left and right sides closest to the magwell but none out towards the end of the barrel.
Regarding the handguard, does it come with m-lok cutouts on the bottom in addition to the m-lok cutouts on the sides?
Greg E on Jun 25, 2018
BEST ANSWER: Yes it does.. 3- 6 - 9 o'clock position for M-LOK.
Is this a free float rail system?
Christopher H on Sep 10, 2018
BEST ANSWER: Yes, Free floating with M-Lok slots for accessories. Let me know if you have any other questions. I am very happy with this purchase. Fit perfectly on my Tennessee Arms lower. No gaps or wiggle.
Can this barrel shoot 223 rem?
TangoXrayNiner T on Mar 19, 2019
BEST ANSWER: Yes. Anything chambered in 556 NATO can shoot 223 Remington. But not the other way around. 5.56 NATO has a much higher chamber pressure than 223 Remington
Will this fit a smith and Wesson lower?
Mossyoak on Jul 14, 2019
BEST ANSWER: Yes. But with nonmatching brands the finish may not match, and there could be a very slight gap or wobble between recievers. This is a nice upper and a good price, you will enjoy it and feel its a great value.
Is the muzzle device screwed-in/pinned or is it permanently attached? I just want to know if I can replace it down the road. Thank you.
Lee Jameson T on Mar 17, 2019
BEST ANSWER: Nope, threads right off! No pining or anything like that.
Would this fit a delton ar-15 lower?
Tyler S on Oct 16, 2018
BEST ANSWER: Yes. I have a DT sport and it fits nice. No wiggle or jiggle.
Will this PSA upper fit a Bushmaster X-15 lower?
scott c on Jun 18, 2019
BEST ANSWER: It should fit any AR 5.56/.223 lower. 2 pins and it's in. That's what makes owning several AR's fun. They are interchangeable.
Does this have a chrome plated boar?
DoorKicker918 on Oct 6, 2018
BEST ANSWER: Chrome Lining: None

No but just buy a barrel with a chrome lining and replace it one day down the line.

All you have to do is read the specs: And that's BORE by the way.
Why does this product now have a chemical warning when it did not before?
Bear Wolf on Apr 2, 2019
BEST ANSWER: California
What is the difference between this one and SKU 5165 4486 71?
JINGXIN N on Oct 25, 2018
PSA 16
PSA 16" Mid-length 5.56 NATO 1:7 Nitride 15" Lightweight M-lok Upper - With BCG & CH - 5165448671
PSA 16
PSA 16" Mid Length 1/7 Nitride 15" Lightweight M-lok Upper With BCG & CH - 5165449680
BEST ANSWER: ONE has the bolt carrier group and charging handle, other doesn't.
Is the barrel 4150 steel ?
Mark R on Jun 19, 2018
BEST ANSWER: Chrome molly vanadium is 4140 steel
I'm considering this upper for my next build. With it's mid length gas block, would a carbine length or rifle length buffer spring be best for function? Thanks in advance.
Bradley A on Jul 13, 2019
Is the bolt carrier MPI?
I'm sure it is but I couldn't find it on here.
Adrian X on Jun 11, 2019
Is carrier 8260 or 158? I see the bolt is 158
bill s on Mar 22, 2019
Is this a heavy barrel? I live in Maryland and state law requires rifles to have be heavy barrels.
codyo_2000 on Feb 11, 2019


4.8 / 5.0
31 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
First build Great buy
It is great nice and tight had trouble with magpul iron sights going on the receiver end had to file down channel on sight but over all it is great told a friend and he bought an ar10
User submitted image
Added Jul 21, 2019
July 21, 2019
1 month ago
Great for the price.
July 14, 2019
1 month ago
Works well
Lots of mounting real estate, rail is solid
User submitted image
Added Jul 7, 2019
July 7, 2019
1 month ago
Can’t go wrong with the price
This is a high quality upper. What a great time to be building AR’s. The price point on these are really unbelievable. I’ve had great success plinking paper, steel and prairie dogs. Accuracy is top notch. I mounted a Sig Romeo 5 from PSA in mine. Great product!
User submitted image
User submitted image
June 8, 2019
3 months ago
I built my AR part by part I had never done that before. This upper is unbelievably light. Add some accessories, iron sights & a RedDot & it becomes an extension of my body. What I have now cannot even be compared to M16A1 & A2 that I used in the military & nuclear security. I love the M-lok system. This is a winner by far.
June 4, 2019
3 months ago
Good deal for what I paid.
Love everything but the weight. The barrel has a lot of extra metal on it. Got about 400 rounds through it and it loves it all, zero failures. Currently getting 1" @ 100 but I think she could shoot a bit tighter with a fancy trigger. This is a good choice for a durability / reliability build.
May 29, 2019
Amazing upper for the money. The mid length is an awesome system. Very happy. Put about 500 rounds through it the first range session and got 1 failure to feed. Went home and cleaned and oiled it, put about another 1500 rounds through it since then with zero malfunctions. Really happy with it.
May 18, 2019
4 months ago
Great value
Love it! Great upper for the price
May 4, 2019
4 months ago
Awesome upper
Love it! Love the M-Lok rail!
PSA Magpul MOE lower fits great feels great
PSA Magpul MOE lower fits great feels great
February 16, 2019
5 months ago
Very nice upper!
Beautiful,,,,simply beautiful.
PSA upper and lower.
PSA upper and lower.
February 7, 2019
5 months ago

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