10.5" SBA3 carbine ar 15 pistol kit

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PSA 10.5" Carbine 5.56 NATO 1:7 Phosphate 12" Slant M-Lok MOE EPT SBA3 Pistol Kit w/ MBUS Set & NiB BCG


Quick Overview

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

SKU: 5165449551
UPC: 5165449551
MFR#: 5165449551
  • 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: 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, Toolcraft C158 NiB BCG
  • Bolt Steel: Carpenter 158, Nickel Boron
  • Bolt Carrier Profile: Full-auto
  • Charging Handle Included: Yes
  • Overall Length: 21"
  • Build Kit: MOE SBA3 EPT Pistol Kit, Black
  • Sights: Magpul MBUS Sight Set, Black

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 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 Carrier Group: ToolCraft nickel boron BCG has a bolt 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.

Includes:  Magpul MBUS Sight Set, Black

SKU: 5165449551
SKU 5165449551
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: 5165449551

Questions and Answers

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Browse 9 questions Browse 9 questions and 28 answers
What’s the weight on this kit, assembled into a functional pistol?
Davie I on Nov 2, 2018
What is the ETA on this kit coming back in stock?
Casey C on Mar 13, 2019
Does the top of the handguard have mlok slots since there isn’t a picatinny rail across the top?
William W on Mar 1, 2019
BEST ANSWER: Yes. And I placed a rubber MLOK cover in it, as well as the sides and bottom, save a couple of slots for a finger/hand stop. This upper has run without fail for 500 rounds. So far, so good. Happy shooting with your new AR pistol!
is this a free floated handguard?
some guy on Nov 18, 2018
BEST ANSWER: Yes it is a floated hand guard. I have taken it to the range several times and it functioned very well. Hope that this helped.
Is there room under the handguards for a 1.5" silencer given that the flash can is 1.2"??
Yourmom on Mar 1, 2019
BEST ANSWER: No it will not work with that size. I have an omega, doesn't fit. Get the one with the exposed flashhider and you'll be ok.
can the flash can be removed?
coolkidx1990 on Sep 12, 2018
BEST ANSWER: Yes it can be removed if the hand guard is remove first but I would recommend the flash can over the normal flash hider for this configuration.
Are these treated as if I was buying a pistol?
Greg H on Mar 1, 2019
BEST ANSWER: Depends on your local laws, yes this is a pistol as long as you have the brace on.
do you ship to California?
Tzelake on Mar 20, 2019
PSA 10.5
PSA 10.5" Carbine 5.56 NATO 1:7 Phosphate 12" Slant M-Lok MOE EPT SBA3 Pistol Kit w/ MBUS Set & NiB BCG
PSA 10.5
PSA 10.5" Carbine 5.56 NATO 1:7 Nitride 12" Slant M-Lok MOE EPT SBA3 Pistol Kit w/ MBUS Set & NiB BCG
What is the diameter of this Handguard. Will a spikes tactical barking spider 2 with an outside diameter of 1.4” fit on this?
Victor on Mar 3, 2019


4.9 / 5.0
15 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great Buy
Kit exceeded expectations.
User submitted image
Added Jun 2, 2019
June 2, 2019
7 months ago
Great upper, buy one.
I bought this upper to put on my extra lower. The fit and finish was great. I got the upgraded BCG and trigger system. I shot it this weekend and it shoots great. I would recommend this upper to anyone wanting to build a pistol or SBR.
User submitted image
Added May 1, 2019
May 1, 2019
7 months ago
A lot of fun to shoot, great addition to a project AR!
Zero issues, runs like a champ.
March 3, 2019
11 months ago
So nice I bought it twice!
Great product amazing price Bought 2 of them
February 22, 2019
1 year ago
Excellent Product! PSA got this.
If you are looking to build an affordable yet cool ar pistol look no further! Buy this kit. NiB BCG! Mlok, SBa3, lower parts kit Magpul Moe grip. Psa flash can, thats all you need. You can upgrade the buffer spring and buffer if you want, however the kit is suffice enough. I love my first PSA Ar Pistol.
January 16, 2019
10 months ago
Great quality for the price
Very nice looking rail
December 27, 2018
11 months ago
Good shooting, lots of fun and inexpensive.
Good quality parts and cant beat the price. This was my first personal build and I look forward to more. Shot straight and tight right out the gate, hardly had to adjust the sights at all. Runs like a champ with several hundred rounds through it already. Only issue I've had, and it is a bit of an issue, is the rail came loose off of the barrel nut after a couple hundred rounds. The screws holding on backed out and one completely came out. Fortunately I found the screw and nut which totally backed out and discovered the second one was about to as well. I retorqued them with some proper thread locker on there (I assume PSA thread locked them to begin with but it failed at any rate) and havent had an issue since. I kind of chalk that up to a normal break in but I have never had an issue like this with any other rifle. Like I said though, for the money I cant complain too much and I know several people who have used PSA upper assemblies for many different applications and have zero issues so i wont hesitate to buy another. I've recommended PSA to several people now.
December 26, 2018
11 months ago
First self build and now I’m hooked. Love this setup.
December 16, 2018
11 months ago
Put this pistol kit together the day it arrived and have put a few hundred rounds through it and it's perfect.
November 30, 2018
11 months ago
Worth Every Penny I spent
This is/was my first pistol build. Everything went flawless from start to finish
I would and will buy another kit from PSA
User submitted image
Added Nov 25, 2018
November 25, 2018
1 year ago

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