PSA 10.5" Pistol-Length 300AAC 1/8 Phosphate 9" Lightweight M-Lok MOE EPT SBA3 Pistol Kit

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PSA 10.5" Pistol-Length 300AAC 1/8 Phosphate 9" Lightweight M-Lok MOE EPT SBA3 Pistol Kit


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 (CA Health and Safety Code Section 25249.6).

SKU: 5165458163
UPC: 5165458163
MFR#: 5165458163

Barrel Length: 10.5"
Barrel Profile: Heavy
Gas System: Pistol-length
Barrel Steel: 4150V Chrome Moly Vanadium
Barrel Finish: Phosphate 
Chrome Lining: No
Muzzle Thread: 5/8-24
Chamber: 300AAC Blackout
Twist Rate: 1:8
Barrel Extension: M4
Diameter at Gas Block: .750
Gas Block Type: Low-profile
Muzzle Device: PSA A2 Flash Hider
Receiver Material: Forged 7075 T6 Aluminum
Receiver Type: M4
Handguard Type: PSA 9" Lightweight M-Lok Rail
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Build Kit: MOE SBA3 EPT Pistol Kit, Black

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Barrel: 10.5" 4150V Chrome Moly vanadium steel, phosphate coated and chambered in 300AAC Blackout with a 1 in 8" twist. Pistol length gas barrel is finished off with a PSA Lightweight 9" M-Lok rail, a low profile gas block, and a PSA A2 Flash Hider.

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.

Bolt Carrier Group 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. 

SKU: 5165458163
SKU 5165458163
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: 5165458163

Questions and Answers

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Browse 3 questions Browse 3 questions and 2 answers
will the upper cycle when used with a suppressor?
bryan b on May 9, 2019
Is this 1 in 8 twist or 1 in 7?
Renton on May 3, 2019
BEST ANSWER: Umm it says 1/8 in the title lolEnter
Does this work with the FosTech Echo Trigger?
M D on May 9, 2019


4.7 / 5.0
11 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Nice piece!
Nice piece! Functioned perfectly right out of the box! I would recommend this upper!
August 30, 2019
4 months ago
Excellent value!
I had purchased a .300BLK barrel a while back to build an upper, but you can't buy the parts for the price of this complete kit. Mine runs perfectly so far with 220gr subs. My only gripe (and it's minor) is the forend to gas block clearance is very tight, which presented some challenges when mounting to the bottom M Lok rail.
July 23, 2019
3 months ago
It ROCKS I am very pleased.
July 12, 2019
4 months ago
Great kit and was thrilled with my build. Definitely doing business with PSA again.
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Added Jul 3, 2019
July 3, 2019
4 months ago
I enjoyed it so much I now own 2.
I was impressed that I could hold a 2 inch grouping at 100 yards with the short barrel.
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Added Jun 29, 2019
June 29, 2019
3 months ago
Best .300 AAC Bang for Your Buck!
I purchased this kit on sale for $349, and used a PSA stripped lower to complete the build. The fit and finish of the parts were excellent, and there were no issues during assembly. I swapped out of few items (grip, trigger, buffer) to customize it to my personal preferences, and mounted a Bushnell 1-4 optic for testing purposes. This kit doesn't come with an adjustable gas block, and I took it to the range to see if I could get both subsonic and supersonic ammo to function through it without having to swap out the gas block. I wanted to be able to use this on the progressive steel-target pistol range at closer distances using the subsonic ammo to prevent damaging the steel silhouettes. I tested both Magtech 200 gr subsonic and Magtech 123 gr supersonic ammo. Both types of ammo functioned flawlessly with 0 malfunctions. The 123 gr ammo was dropping the casings right at 12 o'clock, while the 200 gr subsonic ammo was dropping at 5 o'clock. Recoil was manageable with both, although the subsonic was decidedly less felt. I didn't test for accuracy on this range trip, as I was more interested in the function with both sub and super ammo. Basically, I just did quick prone supported zeroing on steel targets and then was shooting off-hand from there. I can't speak to the longevity of the gun but I am extremely happy with how this gun functions. I highly recommend this build, especially if your'e on a budget!
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Added Jun 28, 2019
June 28, 2019
3 months ago
Very happy
Great quality, great accuracy, speedy delivery.
HooRay for PSA !!
Will be back again....
June 27, 2019
3 months ago
This kit is amazing for what it is.
Don’t buy this kit and expect to have some hyper quality rifle when your done building..... but.... if your looking for an affordable build kit that will produce a rifle that goes bang every time you pull the trigger, this one’s your huckleberry. A few after market upgrades and a good custom mandalorian paint job and this is now one of my favorite rifles in my collection.
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June 20, 2019
3 months ago
PSA is now my favorite gun store
I've liked everything I've gotten from PSA so far, but this kit was my favorite. Do I think its the same level of quality as a Sig Rattler? No. But that gun is 8x the price. I bought this kit as my tinker gun to customize. I figure, if I screw it up, no big deal.

I was concerned I wouldn't like the trigger and I had plans to replace that first. Nonsense. While its a tad on the heavy side, it is an excellent, solid trigger that does its job. I have no plans to change it anytime soon.

The SBA3 brace is my favorite of the braces and it's normally $100 bucks by itself. This whole kit was $350!

The best part is the caliber. If you are thinking about a 300 blackout, do it. I generally use subsonic rounds as the recoil and noise is minimal. However, if I ever need to hunt deer (or bigger game) or need it for SHTF scenarios, I can load it with the speedy stuff. Its a very versatile round. If you are thinking about a suppressor, than buying this gun is a no-brainer. I suspect only suppressed 22lr is quieter.

It's accuracy is spot on. With decent ammo I was shooting quarter groups at 25 yards (with a 2 moa red dot).

The only negative was I had two misfeeds while I put 300 rounds through it. However, I suspect it is not the gun, but rather the fact I was using generic 556 mags. I've heard that switching to a dedicated 300 blk mag solves that problem. If I can update this review, I will.
June 5, 2019
100% impressed
I took this out with my son last weekend, really easy for him to shoot even with supersonic rounds, he loves it, its a good step up from 22lr for a kid. I was also impressed I was able to tag the 500yd target a few times
my 10 year old shooting the 300 blkout
my 10 year old shooting the 300 blkout
June 5, 2019
3 months ago

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