PSA 10.5" Carbine-Length 5.56 NATO 1/7 Nitride 12" Slant M-Lok MOE EPT SBA3 Pistol Kit - 5165448877

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PSA 10.5" Carbine-Length 5.56 NATO 1/7 Nitride 12" Slant M-Lok MOE EPT SBA3 Pistol Kit - 5165448877


Quick Overview

free shipping Free Shipping applies to this item only and not the entire order.

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.

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: 5165448877
UPC: 5165448877
MFR#: 5165448877

Barrel Length: 10.5"
Barrel Profile: A2
Gas System: Carbine-Length
Barrel Steel: 4150V Chrome Moly Vanadium
Barrel Finish: Nitride
Chrome Lining: No
Muzzle Thread: 1/2x28
Chamber: 5.56 NATO 
Twist Rate: 1:7
Barrel Extension: M4
Diameter at Gas Block: .750
Gas Block Type: Low-profile
Muzzle Device: PSA Fluted Flash Can
Receiver Material: Forged 7075 T6 Aluminum
Receiver Type: M4
Handguard 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
Overall Length: 21"
Build Kit: MOE SBA3 EPT Pistol Kit, Black

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Barrel: 10.5" 4150V Chrome Moly vanadium steel, nitride treated for accuracy and durability, 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 PSA 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 Fluted "FLASH CAN". This is a solid 6061 aluminum device that is designed to direct muzzle gases and the muzzle flash forward. Threaded 1/2x28 for 5.56 NATO. Black military-style 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. 

Build Kit: A high quality lower build kit with everything you need to assemble your AR-15 lower into a pistol. Features Enhanced Polished Trigger (EPT), Magpul Grip, Magpul Trigger Guard, and black oxide coated hammer and trigger springs. Also includes SB Tactical SBA3 Adjustable Pistol Brace, castle nut, latch plate, carbine buffer spring, 5 positioning mil-spec buffer tube, and standard carbine buffer.

SKU: 5165448877
SKU 5165448877
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 5165448877

Questions and Answers

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Browse 37 questions Browse 37 questions and 81 answers
When will this be back in stock?
Cade K on Nov 24, 2018
BEST ANSWER: It is now, my friend!
Can I use a suppressor with the rail on this build?
Travis C on Aug 26, 2018
BEST ANSWER: The PSA flash can has an o.d. of 1.20”. Measuring my PSA 12” mlok slant rail and anything larger then 1.20” might make contact while firing due to barrel whip and close tolerances. Most 5.56 rated suppressors are around 1.5” o.d. So in general I would say no a suppressor cannot be with this combination of a 10.5” barrel, and this particular 12” rail.
Can this be shipped to California?
Ed B on Jan 7, 2019
Does the build kit include everything for a stripped lower?
David S on Jul 30, 2018
BEST ANSWER: Absolutely! Only thing I added was a sling loop under the castle nut. Great kit and excellent trigger group.
Whats better. Pistol or carbine gas for the 10.5 kit?
jeremiah f on Aug 27, 2018
BEST ANSWER: The dwell time on the carbine length gas system is a little bit short with a 10.5" barrel; the dwell time on a pistol length gas system is a little bit long. I have not experienced any problems with my carbine length gas system and 10.5" barrel.
what is the the differance between 516 5448 877 and 516 5450 476?
shane r on Jan 31, 2019
PSA 10.5
PSA 10.5" Carbine-Length 5.56 NATO 1/7 Nitride 12" Slant M-Lok MOE EPT SBA3 Pistol Kit - 5165448877
PSA 10.5
PSA 10.5" Carbine-Length 5.56 NATO 1/7 Nitride 12" Slant M-Lok MOE EPT SBA3 Pistol Kit - 5165450476
BEST ANSWER: The difference is the rail. Get whichever rail is more aesthetically pleasing to you.
Can this item be shipped to Maryland ?
RyanB on Aug 7, 2018
BEST ANSWER: Yes I live in crisfield and I had my 14.5 shipped to my house. also if the item is restricted it will tell you once you add it to your shopping cart
When assembled, what is the overall length from the flash can to the back end of the buffer tube? To the back end of the brace when in the shortest position and longest position?
Frank G on Dec 3, 2018
BEST ANSWER: Someone posted a pic in the reviews. It looks like just over 28”
What is the overall weight of this upper setup?
Jonathan K on Sep 21, 2018
BEST ANSWER: Just under 7lbs.
Will any lower work?
Raul M on Dec 7, 2018
BEST ANSWER: Mine’s sitting on an Anderson Manufacturing lower and so far it functions perfectly.
What is the difference between the sku# ending in 5448807 VS.
sku# ending in 5448877...?
What am I missing?
D W on Jan 4, 2019
PSA 10.5
PSA 10.5" Carbine-Length 5.56 NATO 1/7 Nitride 12" Slant M-Lok MOE EPT SBA3 Pistol Kit - 5165448877
PSA 10.5
PSA 10.5" Carbine-Length 5.56 NATO 1/7 Nitride 12" Slant M-Lok MOE EPT SBA3 Pistol Kit - 5165448807
BEST ANSWER: One has a full rail on the handguard... The other has just thr rail at the front and back is all I can see...
I can seem to locate the brand name for the barrel. Is it listed on here? If so what is the brand?
Braden S on Dec 4, 2018
BEST ANSWER: There are no markings indicating the barrel manufacturer. Just "300BLK 1/8".
Any idea when these will be back in stock?
Chunt on Feb 8, 2019
Is the flash can “permanently fixed” (i.e. pinned and welded) to the barrel?
MacBean on Jan 1, 2019
BEST ANSWER: It is my understanding the flash can is screwed on. When the hand guard is removed the fully exposed can will be seen with two flat sides at it's rear. Connecting a wrench here should remove it. There are no welds at the rear of the can. I have not tried to remove mine. Looks cool and gives it a bull barrel look.
Hi is this kit requires SBR from atf or Is this considered a pistol thank you ?
Christian on Jan 28, 2019
BEST ANSWER: If you're "intent" is to build a pistol, it's considered a pistol because of the SBA3 brace (Google SB Tactical ATF Letter). Keep in mind, it is all about "intent"; if you're "intent" is to bypass and use your pistol as an SBR, your "intent" makes it an SBR. This holds true from my research for all AR pistol builds.
Does the 21 OAL refer to the upper? Or the pistol in it’s completed form?
benjiman c on Mar 9, 2019
BEST ANSWER: Upper only you must purchase a stripped reciver and assemble it ! Also let your ffl you send reciver to that reciver is for multi use as your building a pistol build !
What are the necessary tools to put this build together?
Dylan H on Feb 5, 2019
BEST ANSWER: A set of roll pin punches, a vice, and a hammer with a polymer strike face and a brass strike face. Maybe some needle nose pliers. Three hands also helps.
Can this be bought in store?
Corey R on Mar 22, 2019
BEST ANSWER: Possibly, but this can be shipped to your door. All you need to pick up from the store is the lower. I love mine.
What is the difference between this kit and the seemingly identical kit with the sku ending with 807 instead of 877?
Mike D on Jan 1, 2019
BEST ANSWER: One model has picitinny rail on top of the free float all the way down. The other only has picitinny on top at the front of the rail where you would put your front sight. Personally, I bought the full length picitinny rail so I could mount a peq box on top. Other wise you have to mount accessories with mlok
Which size direct thread mount would I select for a silencer co hybrid?
E W on May 21, 2019
BEST ANSWER: Yes I understand the rail issue but there are shorter rails that can be purchased. I’m just asking which size to buy for the direct mount?
Is it legal to run this brace compressed?
T T on Mar 31, 2019
BEST ANSWER: In Texas it is . If compressed you mean on any one of the collapsible positions on your buffer tube.
What finish is the bcg?
Jose C on Mar 17, 2019
BEST ANSWER: Mine was a Nitride bcg
Is it still legally a pistol with the adjustable “pistol brace “ ?
Leeybarra92 on Jan 4, 2019
BEST ANSWER: You’d have to your the illegal “rifle brace” for that.
Does this kit come with a rear takedown pin detent that is threaded for a 4-40 set screw ? The lower that I want to use with this kit calls for a 4-40 set screw.
Roland G on Dec 6, 2018
BEST ANSWER: This is a standard lower parts kit. If you’re lower has different specs you may have to buy that set screw
Can you get this in FDE?
Naim M on Dec 3, 2018
BEST ANSWER: I don't think so with this particular kit. you can piece one together for close to that price if you look around.
What is a shot-peened Carpenter 158 steel?
Herb D on Apr 6, 2019
BEST ANSWER: I'm not a metallurgist but I am a certified armorer and i can tell you C158 steel is what you want your bolt to be made of. The other common option is 9310 steel which is not as durable and in my opinion should be avoided. So in short, C158 is good, and so is this kit.

What is the over all length of the pistol with brace installed? 21"?
Leomtz03 on Oct 22, 2018
BEST ANSWER: no, just the upper itself with barrel and flash can is 21"
If I have never built my own gun. How hard is it for someone that doesn’t know how and what exactly else will I need to buy ?
Ranger U on May 2, 2019
BEST ANSWER: It's very easy to build, (You Tube has thousands of regular people doing step by step video instructions. Watch a few of them to judge whether or not you'd feel comfortable doing it yourself).

For additional parts, you'll need the lower receiver, at least one magazine, and some type of aiming device, (Scope, Red Dot, Iron Sights)
Can this be shipped to Utah?
MrrrrQ on Apr 1, 2019
Is the Bolt Carrier nitride or phosphate?
Kim W on Mar 15, 2019


4.7 / 5.0
108 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great build!
Love it! Great build quality, great performance.
May 23, 2019
2 months ago
PSA 10.5
Overall purchase of this complete upper and lower assembly was very well packaged. It shots without a hiccup with steel case ammo and still breaking it in
May 18, 2019
2 months ago
Didnt think I would like it. But actually I love the way it shoots and handles. Great gun!
May 17, 2019
2 months ago
Hard to Beat for the Money
Don’t be afraid to buy this! I’m pleased with mine!
May 17, 2019
3 months ago
Great "On a budget" gun
Great gun for the price. Bought some pop up sights and red dot scope to compliment gun. Will purchase from this company again.
May 16, 2019
2 months ago
Great build kit for a beginner!
This 10.5” PSA build has to be one of the best build kits on the market with some of the best prices. I plan to buy another build kit in .300Blackout soon from them! Great quality, fast shipping, all parts fit as described, awesome company to do business with!
Love this build! Easy to put together for first time builders and well worth the price!
User submitted image
May 10, 2019
2 months ago
Great product! Absolutely recommend for the price it’s a good option
May 7, 2019
2 months ago
May 6, 2019
2 months ago
My first pistol build and it is just as accurate as my full length rifle
April 29, 2019
2 months ago
Best bang for the buck. Great quality as usual.
April 26, 2019
2 months ago

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