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PSA 16" Mid-length 5.56 NATO 1:8 Stainless Steel Freedom Rifle Kit - 508077


Quick Overview

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 (CA Health and Safety Code Section 25249.6).

SKU: 508077
UPC: 508077
MFR#: 508077

16" Barrel Length
5.56 NATO Chamber
1 in 8" twist
416 Stainless Steel Barrel
Mid-length Gas System
PSA Freedom Lower Build Kit
M16 Full Auto Bolt Carrier
C158 HPT/MPI Bolt
Charging Handle

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Barrel: 416 Stainless steel. Chambered in 5.56 NATO, with a 1/8 twist, M4 barrel extension, and a mid-length gas system. Barrel is finished off with a standard handguard, F-Marked gas sight base, and A2 flash hider.

Upper: Forged 7075-T6 A3 AR upper is machined to MIL-SPECS and hard coat anodized. 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.

Lower Build Kit: Everything you need to turn your stripped lower into a complete lower.


SKU: 508077
SKU 508077
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: 508077

Questions and Answers

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Browse 7 questions Browse 7 questions and 14 answers
Which low profile gas block will fit this barrel?
Richard A on Dec 4, 2019
BEST ANSWER: I believe I have a .75” low pro gas block on mine.
is this a pencil barrel or an HBAR?
Lynn S on Dec 27, 2018
BEST ANSWER: This is not a pencil/light weight barrel, it's more a HBAR. I had to go back through my purchase orders to look at this one for your answer. I've ordered so many rifle kits from PSA that it's difficult to keep track of all of them and I haven't been disappointed with any of them.
Was wondering why my rifle won’t cycle 223 rounds?
Wahoo on Feb 16, 2020
BEST ANSWER: I had the same problem using Silver bear 223 last month in a PSA mid-length rifle. I had 2 other brands of .556 NATO with me and both ran fine. After having the issue in 2 other ARs it seemed like the 223 was just too under powered to run consistently. BTW, the Silver bear ran well in a couple of other ARs present that day. They were also mid-length PSA rifles. You may be able to change buffer weights to solve the problem but mine was rectified by using NATO spec ammo.
So is this a 1:8 twist as the description states or is it a 1:7 as in the reviews?
blupupher on Dec 16, 2019
BEST ANSWER: The one I got when I ordered is marked 1:7
Is this a triangle or circle end cap?
Trenton H on Dec 15, 2019
BEST ANSWER: Mine is equipped with the triangle end cap.
Does this ship directly to me?
Justin W on Mar 20, 2020
Can this stock accept a forward hand grip?
dave793 on Feb 14, 2020


4.8 / 5.0
89 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great Value
I am a beginner with rifles, and this was an inexpensive way to start and learn. I am very happy with it! Dead on at 100 yards, and I anticipate the same once we get it to a longer range. Shoots great, not a single problem with assembly.
May 20, 2020
2 months ago
Great Kit!
Great kit. Love it and every kit I’ve bought from PSA.
May 18, 2020
2 months ago
Easy first AR build
Great rifle my first AR build. It shoot's great.
A few up grades tack driver at 200 yards.
A few up grades tack driver at 200 yards.
May 13, 2020
2 months ago
exactly what i needed at a great price
May 1, 2020
2 months ago
All assembled by me. Ar 15 5.56
Really happy overall, good price for the upper as well as the stock, trigger, pins & springs
April 26, 2020
2 months ago
Excellent value, great purchase.
Great value. Lower parts kit was complete, and assembly went smooth. Upgraded to a BCM gunfighter forend, but the gun shot extremely well once assembled. Very accurite, pretty smooth in operation.
April 26, 2020
2 months ago
Excellent gun!
Was easy to assemble, shoots and looks good.
April 3, 2020
4 months ago
Very Pleased
Excellent quality, went together perfectly. Put a scope and first shot 55 at 55 yds hit an apple!
April 1, 2020
4 months ago
To make the rifle unique to me, I upgraded several parts from the basic kit and the rifle is now an awesome shooter (sub MOA) with even more versatility. Magpul MOE grip and CTR stock, 13" UTG hand guard, adjustable SS gas block, fold down sights, Nikon 223 Tactical scope and 3 lb. CMC trigger.
User submitted image
User submitted image
Nikon 223 Tactical scope
February 21, 2020
5 months ago
Missing Parts
Overall nice kit but came with missing parts i called them the day after i received the kit because it was missing the trigger and hammer springs they said they would get them shipped to me in a couple business days a week later still no springs called them again and they said one was going out today and the other is on back order why couldn't they tell me that the first time i talked them and why should it take longer to get the missing parts than the kit also.
February 14, 2020

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