7.5 inch ar-15 pistol barreled upper assembly

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PSA 7.5" Pistol-length 300AAC Blackout 1/7 Nitride 7" Lightweight M-Lok Upper With BCG & CH - 5165449727


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

SKU: 5165449727
UPC: 5165449727
MFR#: 5165449727

Barrel Length: 7.5"
Gas System: Pistol Length
Barrel Profile: Heavy
Barrel Steel: 4150V 
Barrel Finish: Nitride
Chrome Lining: None
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: A2 Style Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: M4
Handguard Type: PSA 7" Lightweight M-Lok Free Float Rail
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-Auto
Charging Handle Included: Yes
Overall Length: 17"

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Barrel: 7.5" Chambered in 300AAC Blackout, with a 1:7 twist rate, M4 barrel extension, and a pistol length gas system.  This nitride barrel is finished off with a PSA 7" Lightweight M-Lok free-float rail, .750" diameter low profile gas block, and an A2 flash hider.

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

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.

SKU: 5165449727
SKU 5165449727
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Unit Price N/A
Youtube Video No
Free Shipping? Yes
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 5165449727

Questions and Answers

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Browse 8 questions Browse 8 questions and 15 answers
Will the handguard interfere with the mounting of a suppressor?
john c on Oct 13, 2018
BEST ANSWER: Wish someone could answer this question. I want to use a QD muzzle device with my silencerco omega.
What's the inner diameter of the M-Lok free-float rail?
Eric F on Oct 10, 2018
The title says nitride but the description says phosphate. What is the barrel coating?
John1 on Oct 4, 2018
BEST ANSWER: Hey John1, since it says it twice in the description and the Price, My money IS ON "Phosphate"
Peace Mav
Can a suppressor be fully seated before it makes contact with the hand guard?
Jeremy B on Dec 29, 2018
BEST ANSWER: Mine worked out perfectly. I have a Yankee Hill suppressor and it stands off the end of the hand guard by about 1/8 of an inch. Your mileage may vary depending on the suppressor design.
Does this have any issues with ejecting/ cycling? What weight of buffer would be best for a pistol or a SBR? Thanks!
K B on Jan 31, 2019
Will this barrel stabilize subsonic/heavy ammo?
Scott on May 22, 2019
BEST ANSWER: Yes I shoot subsonic 200 grain ammo in this barrel all the time and have applied for NFA stamp for silencor
Anyone mount a surefire suppressor on this with the qd mount? just making sure there is space.
Ryan P on Apr 10, 2019
BEST ANSWER: Recce 7 with the quick adapter has plenty of room between the suppressor and the hand guard. It is a close fit with a wrench to remove the flash suppressor. Direct thread is a little tight, but does work.
Recommendations for best hunting ammunition (accuracy) for this barrel? Will be shooting probably no more than 75 yards.
Bobby on May 26, 2019
BEST ANSWER: This might be biased because I love Hornady but the FTX 135 gr work great


4.7 / 5.0
19 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Kinda disappointed
My order was missing the bcg and the charging handle when I got it. Nothing is very smooth in the internals. I cleaned everything really good and lubed it and it’s still pretty sticky. I love PSA products as a whole but I’m incredibly disappointed with this one
July 9, 2019
2 months ago
Response from Palmetto State Armory
We do apologize for that. Please contact Customer Service so we may resolve this issue.
July 16, 2019
Casey S
I only give this upper a 4star rating because my silencerCo Hybrid butted up against the hand guard to much I had to purchase an additional barrel washers to prevent rubbing of suppressor and hand guard.
June 28, 2019
1 month ago
Psa 7.5" upper
This is the 4th 300 blackout upper I've bought from PSA. I can't be happier. They are mil-spec and everything PSA says they will be. All 4 I've bought have 7.5" barrels and all shoot 1 moa groups or less at 100 yds. Perfect for what I needed and wanted.
June 12, 2019
3 months ago
Perfect Pig Punisher!
Awesome upper! Cycles subs and supers w/ no adjustment to gas block! Feeds flawlessly with lancer 300BO 20 rd mags! 1/4” moa with subs and 1 moa w/supers. Couldn’t be more pleased!
May 26, 2019
7 months ago
Great product.
I love it so much I bought two more. They function and cycle perfectly. No issues..
March 30, 2019
5 months ago
Shot like a champ. Not as loud as people say for a 7.5.
My first build. No issues with this upper. Just wish I had a handguard that had 3 mlok slots at 9 and 3.
Hitting steel with ease!
First day shooting 500 rounds. No issues.
First build. Very happy.
March 23, 2019
5 months ago
Functions as it's supposed to looks great feels great
March 5, 2019
8 months ago
Another great product from PSA.
Great fit and finish. Operates well. No miss fires.
February 26, 2019
6 months ago
Great upper. It fit perfectly on my lower and cycles flawlessly. All the components are well fitted and it shipped quickly.
February 23, 2019
8 months ago
7.5" 300BLK Complete Upper Impressions
I bought this upper during one of those incredible deals PSA puts on daily, as most of us know by now. I originally intended to use this complete upper as an easy way to get into the 300BLK platform. The upper was shipped within a sufficient amount of time and arrived undamaged. PSA has their own cool looking and padded box (which the upper resides in) inside of a plain shipping box. The upper was as expected and without damage or scuffs. Care was taken to zip tip the bolt carrier group to the upper so that it didn't dislodge during shipping. Overall the quality and assembly of the components was up there with the rest. All components were clean with the exception of some brass marks on the shell deflector & bolt face. I'm assuming PSA test fires the upper prior to release? As for accuracy and overall function, well I cannot speak for that. As is usual with most of us, I did scavenge this upper and ultimately created my own with numerous other parts. I did retain the bolt carrier group though...but sorry PSA! In any event this will not be the last time I purchase here, prices & service are exceptional. On a side note, whoever tightens those low profile barrel nuts needs to find a torque wrench and moly thread grease! They're just about tightened to where damage started to show with some threads on the upper receiver barrel extension showing finish wear....along with the last thread being deformed. But again, great stuff here at PSA.
Complete upper depicted right after opening the box.
Fancy PSA box that arrives inside of a plain shipping box for concealment.
February 14, 2019
7 months ago

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