PSA 8.5" Pistol-length 300AAC Blackout 1/8 Phosphate 7" Lightweight M-Lok Upper With BCG & CH - 5165449132

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PSA 8.5" Pistol-length 300AAC Blackout 1/8 Phosphate 7" Lightweight M-Lok Upper With BCG & CH - 5165449132

In stock

Regular Price: $ 399.99

Special Price $ 259.99

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.

SKU: 5165449132
UPC: 5165449132
MFR#: 5165449132
  • Barrel Length: 8.5"
  • Gas System: Pistol-length
  • Barrel Profile: Heavy
  • Barrel Steel: Chrome Moly
  • Barrel Finish: Phosphate
  • Chrome Lining: None
  • Muzzle Thread: 5/8-24"
  • Chamber: 300AAC Blackout
  • Twist Rate: 1 in 8"
  • 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: 7" Lightweight M-Lok Rail
  • Bolt Carrier Group Included: Yes
  • Bolt Steel: Carpenter 158
  • Bolt Carrier Profile: Full-Auto
  • Charging Handle Included: Yes
  • Overall Length: 17"

Add To:

Barrel: Chambered in 300AAC Blackout with a 1:8 twist rate, M4 barrel extension, and a pistol gas system this barrel features a phosphate finish for accuracy and durability. It is finished off with a PSA 7" Lightweight M-Lok 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. Featuring machined T marks, and a mil-spec finish. 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.

Each upper is assembled to order with care, and test fired.

SKU: 5165449132
SKU 5165449132
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
SKU: 5165449132

Questions and Answers

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Browse 7 questions Browse 7 questions and 6 answers
Is the barrel metal 4150 cmv?
Aaron on Aug 18, 2018
Anyone actually run this upper with live ammo ? Buffer and buffer spring are “carbine” and wondering if upper is still overgassed with “carbine” and pistol gas system.
frank w on Sep 22, 2018
BEST ANSWER: Strange question.

Yes... I've put over 400 rounds through mine. Ran fine with several different weight rounds. All supersonic. Haven't gone subsonic yet.
Can you use the same mags as for the 5.56 ?
Andrew P on Sep 21, 2018
BEST ANSWER: Yes and it worked just fine. I ran 150gr 208gr and 220gr with no problems
What is the weight of this upper?
Marshall L on Sep 27, 2018
Can this upper use a suppressor?
Patti on Sep 30, 2018
BEST ANSWER: Of course. Take off the flash hider and attach your supervisor of choice.
Is the gas block pinned or set screws?
Cotie C on Sep 22, 2018
BEST ANSWER: Set screws.
How difficult is get access the muzzle device, will you have to remove the handguard on this specific upper? It's hard to tell in the picture. I'm asking because I want to mount a suppressor with flash hider and don't want to remove the handguard everytime. Thanks
Michael N on Nov 7, 2018


4.5 / 5.0
23 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
I haven't taken it out to the range yet but I did strip it down and inspect. Super happy with this upper as always from Palmetto!
November 9, 2018
1 month ago
Had to send back will not shoot waiting on a new one.
October 31, 2018
1 month ago
Very impressive. Shoots 220 grain noslers in tight group at 100 yards.
Very impressive. Blows my mind how it shoots 220 grain noslers in a tight group at 100 yards
User submitted image
October 30, 2018
1 month ago
Good upper for the money.
The upper worked great. Fits well on milspec lowers. Put about 50 rounds through it and noticed some wear to the bolt carrier group and to the charging handle. Hopefully that doesn't continue or effect the function.
AR 300 Pistol
AR 300 Pistol
October 26, 2018
1 month ago
Worth every penny.
Mounted to my pistol lower perfectly. Accuracy was good though I’ve only shoot low cost FMJ stuff through it. Very impressed for the price. Love this little thing.
User submitted image
American Eagle 150gr FMJ with red dot scope.
October 25, 2018
1 month ago
300AAC was designed for 9" barrel rom the start. Ideal for pistol build. Runs flawlessly and works as intended.
October 25, 2018
1 month ago
10/10 highly recommend to anyone building a. 300 aac pistol.
I recieved it quick. Absolutely love it! I'm about 100 rounds down range and had 0 ftf Or Fte. I wish I would have bought it a long time ago. Perfect for cqb and house clearing.
User submitted image
Added Oct 24, 2018
October 24, 2018
1 month ago
I was skeptical of what to expect for $230 complete and shipped. This thing is top quality. Fit and finish is excellent but most importantly, it runs flawlessly
October 24, 2018
1 month ago
Great upper. The description said it came with t-marks but it did not. Still a pretty good deal.
October 24, 2018
1 month ago
Worth the price
300 black out wow! Was well worth the price
October 24, 2018
1 month ago

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