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

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"

Add To:

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
Department Uppers
Manufacturer 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: 5165448671

Questions and Answers

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Browse 24 questions Browse 24 questions and 68 answers
What is the total weight on this? Thanks!
Grady D on Mar 21, 2019
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 this a "freedom" barrel?
Chase B on Sep 2, 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.
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.
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.
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
BEST ANSWER: I use a standard carbine buffer and it works every shot as expected.
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
Does this have forward assist?
James on Oct 7, 2019
BEST ANSWER: Yes it does, I haven't had to use it but the bolt and upper both support forward assist.
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 A2 flash hider pin and welded to the barrel?
jake a on Oct 6, 2019
BEST ANSWER: No it is not. The pinned and welded flash hider is usually customary to barrels 14.5 or under.
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.
IS This upper compatible?
Edward H on Oct 21, 2019
PSA 16
PSA 16" Mid-length 5.56 NATO 1:7 Nitride 15" Lightweight M-lok Upper - With BCG & CH - 5165448671
PSA AR-15 Complete Classic Lower - No Magazine - 7244
PSA AR-15 Complete Classic Lower - No Magazine - 7244
BEST ANSWER: yes I have purchased two or three uppers from psa as well as four or five lowers while building several long range rifles the uppers and lowers fit perfectly .
Can i put this upper on a Colt lower?
Jose P on Oct 14, 2019

While we cannot guarantee that our uppers and lowers will work with another manufacturers we design our products to work with Mil-Spec receivers.

Best Regards,
Palmetto State Armory Customer Service
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.
Will this upper work with PSA AR-15 COMPLETE LOWER MAGPUL ACS-L EDITION - ODG, NO MAGAZINE - 39609?
James on Oct 8, 2019

Yes, it will.

Best Regards,
Palmetto State Armory Customer Service
Is the bolt carrier MPI?
I'm sure it is but I couldn't find it on here.
Adrian X on Jun 11, 2019
BEST ANSWER: Yes it is, and it is a really nice upper. Very happy with it.
Why does this product now have a chemical warning when it did not before?
Bear Wolf on Apr 2, 2019
BEST ANSWER: California
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
BEST ANSWER: M4 profile. Not what i would consider a heavy barrel.
Is the barrel 4150 steel ?
Mark R on Jun 19, 2018
BEST ANSWER: Chrome molly vanadium is 4140 steel
Does it come shipped in a plain box without PSA on it? I’m shipping it to my workplace.
Chris M on Sep 25, 2019
Is carrier 8260 or 158? I see the bolt is 158
bill s on Mar 22, 2019


4.9 / 5.0
41 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great product palmetto
Awesome price and awesome service
Turned out awesome!! Thank you
Turned out awesome!! Thank you
November 10, 2019
1 month ago
300 rds down range and not one hiccup. This is a good product
November 9, 2019
1 month ago
Great Value
Shipped a lot quicker than other reviews I had read. Ordered on a Friday and received it on the following Tuesday. The cuts on the handguard are smooth. These were the two main negative things I have read so wanted to touch on them. BCG wasn’t excessively covered in factory grease. I still would recommend disassembling and cleaning/lubing it prior to shooting. Shot 150 rounds through it today on my new PSA lower and it performed great. Will definitely be a repeat customer.
November 2, 2019
Why I Chose PSA
I did a fair amount of research to learn about the different brands of ARs. I looked at all price ranges. Given my research, I chose PSA because I believe it is a quality rifle with the best pricing. You could definitely spend a lot more money on other brands, but Im not sure you need to. Friends of mine who serve in the Guard and also do security work, said it's the brand most often used by themselves and their teams. We are real people, with real budgets, trying to get a quality product for a fair price. I bought a PSA upper and lower, and pinned them together. No issue. Havent put that many rounds thru it yet, but runs like a champ so far. Im an older, weekend hobby shooter. No deployments for me, but dont see why this rifle wouldnt go!
User submitted image
Added Oct 25, 2019
October 25, 2019
1 month ago
Great Upper
Thanks for such a great Upper at such a great price!
I also picked up the SigSauer "Red-Dot & MBUS Back Up Sight Package "KIT-0372" what a great combination. A couple of minutes installing and a couple of clicks of adjustment and a 4" grouping at 50 yards. Now time to fine tune :-)
Thanks PSA, i'll be back
October 25, 2019
1 month ago
Feels like it’s made well, shoots accurately and priced well.
October 19, 2019
1 month ago
Great product
Great quality and materials!!! Totally recommended
October 15, 2019
2 months ago
Very good quality
Very good all around upper. I had no problems attaching this to my lower receiver. A great price for a great upper.
October 7, 2019
5stars all the way around. Love the service and attention to detail.
I've built several rifles using these uppers and have been completely satisfied with the performance and precision of them. Top quality, fit and finish even the "blemished " items. Will be a continued customer.
October 6, 2019
2 months ago
I love it , look’s cool and light weight
User submitted image
User submitted image
September 1, 2019
3 months ago