PSA 7.5" Phosphate 5.56 1/7 7"  M-Lok Classic SOB Pistol Kit - 5165447978

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PSA 7.5" Phosphate 5.56 1/7 7" M-Lok Classic SOB Pistol Kit - 5165447978


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: 5165447978
UPC: 5165447978
MFR#: 5165447978
  • Barrel Length: 7.5"
  • Barrel Profile: Pistol
  • Gas System: Pistol-length
  • Barrel Steel: 4150V Chrome Moly Vanadium
  • Barrel Finish: Phophate
  • 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: A2 Flash Hider
  • Receiver Material: Forged 7075 T6
  • Receiver Type: M4
  • Hand guard Type: PSA 7" M-Lok 
  • Bolt Carrier Group Included: Yes
  • Bolt Steel: Carpenter 158
  • Bolt Carrier Profile: Full-auto
  • Charging Handle included: Yes
  • Overall Length: 18"
  • Build Kit: Classic SOB Pistol Kit, Black

Add To:

Barrel:  7.5" 4150V Chrome Moly vanadium steel barrel chambered in 5.56 NATO with a 1 in 7" twist. Pistol-length gas barrel is finished off with an anodized PSA 7" M-Lok Rail, a 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: Full-auto profile bolt carrier group. Milspec Carpenter No. 158® steel bolt, Shot Peened, High pressure tested, Mag particle inspected, Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked Per Mil-Spec. 8620 steel M-16 profile carrier is chrome lined and phosphate coated.

Pistol Build Kit:  A high quality lower build kit with everything you need to assemble your AR-15 lower into a pistol. Features polished hammer and trigger contact points, and black oxide coated hammer and trigger springs. Also includes SB Tactical SOB Pistol Brace, castle nut, double-looped pistol latch plate, carbine buffer spring, and standard carbine buffer.

SKU: 5165447978
SKU 5165447978
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
SKU: 5165447978

Questions and Answers

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Browse 2 questions Browse 2 questions and 5 answers
Is the brace adjustable or fixed?
Sean H on Jul 3, 2018
BEST ANSWER: The brace is fixed. To install it I had to heat up the brace in some hot water and put a small amount of soap on the outside of the buffer tube before sliding it into place. Once it cooled down it became rigid and does not move.
Can this be ordered without the flash hider? If not it's it a permanent fixture or removable?
P R on May 19, 2018


4.8 / 5.0
30 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Now I'm hooked
Five 🌟🌟 🌟 🌟 🌟 now I'm hooked. Take my money. These are really nice kits. If you are just starting to build this is a good way to start.
July 16, 2018
2 months ago
AR Pistol Build Kit
This kit was purchased to build a pistol for home defense purposes. Once assembled, tested and zeroed-in, the finished product is a perfect size for its intended use. As an added benefit, it makes for an ideal "truck gun," since we are able to carry a loaded pistol in our vehicles in my state. This is an item I will purchase again when ready for another build. I have been very satisfied with price, delivery, and customer service from PSA after making a number of purchases from them over the years.
July 13, 2018
3 months ago
Great value
Lightweight easy to use.
July 5, 2018
2 weeks ago
Love em
Ran some green tips through it. Works very well, surprisingly accurate, and now lives under my truck seat. Thanks psa
Irons on this one
Trs25 on this one. Both work well
June 23, 2018
1 month ago
Great value
This made a great pistol on an Anderson lower. Not one issue in hundreds of rounds.
Put this on an Anderson lower and it works flawlessly. Have shot hundreds of steel cased rounds.
Put this on an Anderson lower and it works flawlessly. Have shot hundreds of steel cased rounds.
June 23, 2018
1 month ago
Great product great prices easy to put together for a first time build will purchase more products
June 23, 2018
1 month ago
PSA 7.5"
Arrived as advertised in perfect condition. Fast shipping. Shoots great. Very happy with PSA quality, service and value. An other satisfied customer.
June 22, 2018
1 month ago
This exceeded my expectations in looks and performance!!
June 18, 2018
1 month ago
Buy this little Freedom Dispenser. Worth every penny.
First off, I’ve read some things here and there about PSA and their delay in shipping and dudes waiting forever to get their order. I ordered mine and it took 3 days to get from S.C. to my house in Iowa. πŸ‘. When I received it, I immediately took the rail off for inspection. Barrel nut was tight. Gas block and tube were tight and aligned. Assembled my lower, completed function check with no issues.

Go/No Go gauges checked out. BCG is quality. TIP: when installing the brace onto the tube, apply a thin coat of dish soap to the tube first. This will ease the friction as the fit is tight. Once on and straight, the brace as not moved or turned on me once. I’m pretty specific on my trigger springs and charging handles, so I installed my preference in those as opposed to what came with the build kit. Initial inspection of accompanying charging handle and springs didn’t show anything to be concerned about. Upper receiver to lower receiver (also PSA) fit is tight without excess wobble. Pistol grip that comes in kit is standard A2 style, added Magpul MOE FDE for extra flare. πŸ‡ΊπŸ‡Έ

Attached Trijicon MRO and zeroed without much hassle. Once zeroed, I’m easily ringing 10” steel plate at 100 yds with 62 gr. Federal Tactical Bonded. Didn’t notice any real grouping or performance issues with AE 55 gr. FMJ. Gas system functions correctly with proper cycling, ejection and lock back on empty mag. Buy this pistol complete or the build kit if you prefer. Buy one for Mom. Money won’t be wasted.
User submitted image
User submitted image
June 4, 2018
Poor Quality control
Gas block missing set screw
May 17, 2018
3 months ago
Response from Palmetto State Armory
We do apologize for that. Since all of our parts and firearms are covered by our Unlimited Lifetime Warranty, if you have any issues arise from the craftsmanship of the product, we can either have select parts sent to you for you to replace, or we can have the item brought in, at no cost to you, so we can repair or replace the defective product. Please contact Customer Service so we may resolve this issue.
May 21, 2018
Casey S

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