Due to higher than average order volume, please expect shipping times to be delayed up to 10 business days. Please expect longer wait times for Serialized items (FFL required).
Due to higher than average order volume, please expect shipping times to be delayed up to 10 business days. Please expect longer wait times for Serialized items (FFL required).
PSA 7.5" Pistol-Length 300AAC Blackout 1/7 Nitride 6" Lightweight M-Lok MOE EPT SBA3 Pistol Kit

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PSA 7.5" Pistol-Length 300AAC Blackout 1/7 Nitride 6" 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: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).

SKU: 5165457994
UPC: 5165457994
MFR#: 5165451206


Barrel Length: 7.5"
Barrel Profile: Heavy
Gas System: Pistol-length
Barrel Steel: 4150V Chrome Moly Vanadium
Barrel Finish: Nitride
Chrome Lining: No
Muzzle Thread: 5/8-24
Chamber: 300AAC Blackout
Twist Rate: 1:7
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 6" 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

Add To:

Barrel: 7.5" 4150V Chrome Moly vanadium steel, nitride treated and chambered in 300AAC Blackout with a 1 in 7" twist. Pistol length gas barrel is finished off with a PSA Lightweight 6" 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: 5165457994
SKU 5165457994
Brand Palmetto State Armory
Department Uppers
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: 5165457994

Questions and Answers

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Browse 8 questions Browse 8 questions and 15 answers
Does this kit cycle well? Any problems cycling ammo?
DavidMartinez on May 5, 2019
BEST ANSWER: No problems at all. I have shot subsonic and supersonic through this upper suppressed and non-suppressed.
Is this the entire gun just needs assembling? Or if not what's it missing?
ViolentJ69 on Apr 9, 2019
BEST ANSWER: you also need a bare lower
Preferred optics for this unit? Yes it is looking for recommendations.
Charlotte H on Mar 23, 2020
BEST ANSWER: I like the Sig Sauer Romeo 6 with shake awake
because its always on. I don't like a red dot that must be turned on. Mine has rode in my vehicle for more than a year with the original battery and its still on. I am intentionally leaving it in to see how long it lasts, after that I will change it annually.
Are all parts included new?
Jimmy on Apr 12, 2019
BEST ANSWER: Everything but bare lower, mag and what ever sighting system you want.
Is the muzzle device pinned and welded or just ”loctited” on the barrel?
Jordan R on Apr 8, 2019
BEST ANSWER: No pin, no weld just standard crush washer. Mine was snug but three raps with the palm of my hand on a AR tool had mine spinning off.
is the upper of this kit completely assembled?
garry k on Apr 8, 2019
BEST ANSWER: yes, ready to go
does this kit have the upper barrel Assemb. assembled , put together as one piece ?
garry k on Apr 8, 2019
BEST ANSWER: Short answer YES the uppers come completely assembled
Is the bolt carrier chromed ?
Haysop on Apr 8, 2019
BEST ANSWER: Not the exterior of the bolt carrier, if that is what you are asking, interior I believe it is. They do have a similar kit with NiB (nickel boron coated) bolt carrier although it has a higher price tag of course.


4.9 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Awesome kit for the money
User submitted image
Added Mar 22, 2020
March 22, 2020
2 months ago
Pleasantly Surprised
Wasn't sure what to expect for accuracy but this little unit is capable of 2" groups at 50 yards with a holographic sight.
March 5, 2020
2 months ago
not bad for the money
i havent fired it much but it has cycled super and subsonic rounds (a few hundred) with no issues so far
User submitted image
User submitted image
February 6, 2020
4 months ago
7.5 inch 300 Blackout.
Would give a 5 but have not been to the range yet. I use a red or orange tape on weapon and magazine to prevent me or anyone else using the weapon from placing 5.56 instead of 300 rounds.
User submitted image
User submitted image
November 29, 2019
6 months ago
Bunch of gun for the bucks
Great build on PSA lower. I installed a Law Tactical folding stock, now 17 1/2 inches folded. Nice crisp trigger (not perfect but way better than milspec). SBA brace was tight to slide but broke in with a little time and oil. Put a 2X shotgun/slug gun red dot on the rail. Rings 2" metal targets at 75 yards. Cycles 220 subs with suppressor no problems. Mine doesn't like to cycle 220's without a suppressor. Supersonic ammo, this thing is honey badger (it doesn't give a shyte) and eats anything. I waited until the price was 349, so that's pretty much a steal
October 6, 2019
Great value
Fun little gun for the truck
June 26, 2019
11 months ago
Great value!!
Very nice kit! It fits nice and tight on a discontinued magtech magnesium alloy lower. Works great with a suppressor as well. No problems with my aac 762sdn6. This is the shortest barrel that the suppressor warranty will allow. The pistol brace is sweet, adjusts like a standard stock. All good things
User submitted image
User submitted image
Shorter than a 16 inch ar15 even with the suppressor attached!!!
June 13, 2019
11 months ago
Great weapon !!
Excellent product functions fine with all ammo and suppressed too!!
June 13, 2019
11 months ago
Perfect for what I wanted to begin my supressed 300 blk pistol build with. Fit and function are flawless, will buy similar kits in the future.
Very impressed with this budget build.
June 12, 2019
11 months ago
What a fun project!
I have been very happy with pistol kit. Everything works well and the 300 Blackout is a lot of fun to shoot.
June 11, 2019
11 months ago

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