PSA 10.5" 5.56 Lightweight M-lok Slant 12" Upper With MBUS Sight Set, BCG, CH, & Fluted Flash Can - 516447128

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PSA 10.5" 5.56 Lightweight M-lok Slant 12" Upper With MBUS Sight Set, BCG, CH, & Fluted Flash Can - 516447128


Quick Overview

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It is the customer's responsibility to be aware of all applicable laws and regulations regarding the purchase and ownership of uppers with a barrel length of less than 16". Federal NFA regulations are applicable to this item.

SKU: 516447128
UPC: 516447128
MFR#: 516447128
  • Barrel Length: 10.5"
  • Barrel Profile: A2
  • Gas System: Carbine-length
  • Barrel Steel: 4150V Chrome Moly Vanadium
  • Barrel Finish: Phosphate 
  • Chrome Lining: No
  • 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: Palmetto State Armory Fluted Flash Can
  • Receiver Material: Forged 7075 T6
  • Receiver Type: M4
  • Hand guard Type: PSA 12" Slant End M-Lok Rail
  • Bolt Carrier Group Included: Yes
  • Bolt Steel: Carpenter 158
  • Bolt Carrier Profile: Full-auto
  • Charging Handle included: Yes
  • Includes: Magpul MBUS Sight Set, Black
  • Overall Length: 21"
  • Weight as configured: 3.45 lbs.

Add To:

Barrel: 10.5" 4150V Chrome Moly vanadium steel, phosphate coated and chambered in 5.56 NATO with a 1 in 7" twist. Carbine length gas barrel is finished off with a PSA 12" Slant End M-lok Rail, a low profile gas block and a Palmetto State State Armory Fluted Flash Can.

Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized black for durability. Featuring a mil-spec finish, these uppers are made for us right here in the USA by a mil-spec manufacturer.

Flash Can: Palmetto State Armory's new Fluted Flash Can! This is a solid 6061 aluminum device that is designed to direct muzzle gases and the muzzle flash forward. Threaded 1/2-28 for 5.56 NATO. Black mil-spec hard anodizing. THIS DEVICE IS NOT DESIGNED TO REDUCE RECOIL, MUZZLE RISE, OR FLASH SIGNATURE. This device is designed to direct gasses and noise forward away from the shooter and enhance the weapon's appearance.

Bolt: Bolt is made of Mil-spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is parkerized outside, and chrome lined inside.

Includes: Magpul MBUS Sight Set, Black

SKU: 516447128
SKU 516447128
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
SKU: 516447128

Questions and Answers

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Browse 11 questions Browse 11 questions and 42 answers
If i take off the psa flash can off Is it possible to fit a suppressor inside the handrail?
Dillan C on Apr 30, 2018
BEST ANSWER: If you have a VERY small diameter suppressor, then yes. Otherwise no. This wouldn't work for my can, but I trimmed the handrail back and mounted the flash suppressor that my can mounts to and used it until I can get a proper handrail.
Will an A2 flash suppressor work on this setup?
MStewart on May 1, 2018
BEST ANSWER: I believe so. I own this upper and I would say the flash can is excellent. Maybe you have a good reason to want an A2 so i will say you need to know if the can is pinned on and the threading on the barrel. I do not have any good input on those two. I do believe PSA has the same upper with an A2 and it is cheaper.
Are the parts on this upper the ''premium'' ones or standard?
Teej1 on May 21, 2018
BEST ANSWER: The parts are close to premium. But for the money, you are receiving premium parts for the low cost.
Would a Kineti-Tech Blast Shield work here? If not with the included flash can, then with the Kineti-Tech muzzle brake? Would there be enough clearance?
Paul R on Apr 30, 2018
BEST ANSWER: Probably not. I'm,looking to change the hangars so u can do a Smith vortex
Does it come fully assembled and is all I need a complete lower?
Mikael on Jun 5, 2018
BEST ANSWER: Yes the upper is fully assembled. You will have to install the mbus sights but this only requires a flathead screwdriver. Naturally I would remove the bcg and charging handle, then clean and oil everything, and reassemble. Best of luck.
What kind of lower should I buy for this?
Nelson I on May 21, 2018
BEST ANSWER: If you want the most cost effective lower that is extreme in quality, get an Aero lower. One step down (in my opinion) but still excellent for the price is Anderson. You can step up in price and style from the Aero and equal in quality is Spikes Tactical. When you get to the premium brand names that do not make in house, they are typically made by Aero and they stamp the premium name brand on the lower.
Can anyone who owns this handguard tell me what the I.D. of it is? Thanks in advance.
Matthew W on May 2, 2018
BEST ANSWER: The hand guard is a close fit on the flash can. Flash can measures 1.2 inches.
Does anybody know if a Saker 5.56 can will fit with this rail? Thanks!
Ghost on May 16, 2018
BEST ANSWER: The opening on this Mlok is about 1.5 inches. The Saker being 1.5 inches in diameter I’d have to say yes it will fit and if it didn’t the slightest I mean slightest bit of removal of material around the inside of the hand guard might be necessary and we are talking millimeters or less. But if I were a betting man I would say it would fit and would fit nicely. Hope it helps.
With the recessed muzzle device, does the handguard get hotter? Also hows the psa one at directing thing forward, is a KAK slimline worth it?
Paul R on May 14, 2018
BEST ANSWER: I put a hand stop and handrail covers to protect from the heat. PSA device is nice, works as described!
I'm building an ar pistol with this upper, I'm gonna use a mil spec buffer tube, what weight buffer should I buy to get the best performance out of this upper?
Austin G on May 23, 2018
What is the torque specs on the 2 bolts holding the rail on?
Sam S on May 18, 2018


4.8 / 5.0
33 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Great lower, excellent for CQB and very easy to install and add ambi upgrades
User submitted image
User submitted image
User submitted image
June 22, 2018
1 month ago
Love it
Love everything about this upper. I paired it with a PSA lower, everything was tight and a perfect fit. I popped the mbus sights on and out of the box this thing shot true as true. For a short barrel is amazingly accurate. I've been singing its praises since the first mag. I put about 1200 rounds through it and still no complaints at all. I would 100% recommend this upper to anyone.
June 21, 2018
1 month ago
Great upper receiver.
Great product. Came as advertised. I will definitely buy additional items from PSA.
June 21, 2018
1 month ago
Great upper for the price
I put this upper on a pistol lower for my wife and she really enjoys it. I removed the flash can as soon as it arrived. I recommend doing the same and just donate it to one of your liberal friends so they can proudly display their vape on it or something. Seriously, I’ve seen fancier kit on some of the terrorists I’ve killed. I replaced it immediately with a Lantac Dragon and she really seems to enjoy shooting it. The barrel is of course short but if you have any firearms training whatsoever, you’ll be shooting groups tighter than prom night in no time! If you’re knocking out a budget build for weekend shooting or just want a shorter 5.56 platform in general, pick one up, you won’t be disappointed.
June 20, 2018
1 month ago
10.5 upper
Absolutely great upper and was shipped fast . Ran a few hundred rounds through it and zero issues. Great upper for the price
June 18, 2018
1 month ago
This upper is great. Cycles properly and did not have any issues. The only reason I did not give five stars is because it was sent without an anti-slide plate. That plate connects from the M-LOK handguard to the barrel nut to prevent the handguard from sliding off. I test fired this weapon with a PSA complete lower with the SBA3 pistol brace and like I said flawless. But due to it not having the plate the handguard did start to slide off. The only thing that held it on was the screw from an M-LOK AFG hitting the gas block preventing it from fully sliding off. Mind you that I tightened those screws so tight the handguard starts to bend closer. I did send an email and made a phone call and was told that they no longer provide that plate with the builds or sell them. I was also told that I did not need the plate and it was ok to fire the weapon without it. Other than hiccup I am really impressed with this build. I would buy again and possibly will in the near future on another build I have planned. But something needs to be done for that slide plate problem, or simply buy a handguard from another company that provides the barrel nut and anti-slide plate.
Complete build
Complete build
June 10, 2018
Awesome upper 😎
I am very impressed with this upper! It has been 100% reliable!
A perfect match😉
A perfect match😉
June 6, 2018
1 month ago
Nice upper, ran flawless so far.
June 4, 2018
1 month ago
Great product and service. Excellent prices Would recommend to everyone
My step daughters birthday present w/ Timney trigger and nichol boron bolt
My step daughters birthday present w/ Timney trigger and nichol boron bolt
June 4, 2018
1 month ago
Very happy with this upper!
June 1, 2018
1 month ago

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