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PSA 20" Rifle Length 5.56 NATO 1/7 Nitride A2 Freedom Rifle Kit - 7788893

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Regular Price: $ 589.99

Special Price $ 349.99

Quick Overview

free shipping Free Shipping applies to this item only and not the entire order.

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 (CA Health and Safety Code Section 25249.6).

SKU: 7788893
UPC: 7788893
MFR#: 7788893

Barrel Length: 20"
Gas System: Rifle-length
Barrel Profile: A2 Style
Barrel Steel: 4150V Chrome Moly Vanadium
Barrel Finish: Nitride
Chrome Lining: None
Muzzle Thread: 1/2-28
Chamber: 5.56 NATO
Twist Rate: 1 in 7"
Barrel Extension: M4
Diameter at Gas Block: .750"
Gas Block Type: F-marked FSB
Muzzle Device: A2 Style
Receiver Material: Forged 7075 T6
Receiver Type: M4
Handguard Type: PSA Classic Tapered Handguards
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Overall Length: 28"
Weight as configured: 3.5 lbs

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Barrel: 20" Chrome-moly vanadium steel, chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a rifle-length gas system. The A2-style profile barrel is nitride finished for accuracy and durability. Barrel is finished off with an .750" diameter F-marked Front Sight Base, PSA Classic Handguards, 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.

PSA A2 Freedom A2 Rifle Lower Build Kit: Everything you need to turn your stripped lower into an A2 fixed stock lower. Kit includes A2 stock, rifle length buffer tube, buffer and spring, and PSA Freedom Lower parts kit.



SKU: 7788893
SKU 7788893
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 7788893

Questions and Answers

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Browse 37 questions Browse 37 questions and 131 answers
will the wife be mad if I buy this?
nite f on Jan 4, 2019
BEST ANSWER: Just remind her it’s only the first gun you bought this year.
How do the barrel quality and accuracy compare to this same setup with the FN CHF Chrome lined barrel? Should I wait for that to come back?
Woody S on Jul 25, 2018
BEST ANSWER: Hammer forged is stronger but not as accurate.
Who is the manufacturer of the A2 fixed stock?
elwood F on May 27, 2018
BEST ANSWER: Good question. Why do you want to know?
What's the best barbecue recipe for a Memorial Day cookout?
Scott B on May 27, 2018
BEST ANSWER: 1000 rounds of 223 ammo and the psa 20 inch a2 upper
Can I change out the handguard to the A1 triangular handguards?
Art E on Apr 23, 2018
BEST ANSWER: Yes you can. Back in the day many moons ago the Army didn’t have enough a2s in inventory so training units were issued m16a1s with a2 furniture installed to get basic trainees use to the feel of the weapon they would eventually be issued. My point is the triangular forearm retaining cap will work with both types.
why does the buffer tube spacer rattle in the buttstock. is this normal?
mike r on Aug 8, 2018
BEST ANSWER: Are you sure it is the spacer that is rattling and not the buffer itself? You could take the buffer out of the tube and shake it to see if it makes the same sound you are hearing.
Does this kit come with front sight? Kit778893
Mark G on Dec 4, 2018
BEST ANSWER: Yes. Iron sight on the front. This is a great AR. I’ve run good brass and super dirty steel cased ammo with no issues, it feeds everything like a champ. Solid rifle.
What is the total length of the rifle when assembled? I'm buying a bag before buying the kit.
S T on Oct 26, 2018
BEST ANSWER: The overall length of the assembled rifle is approximately 40 inches.
If I buy this kit, will the only other things I need be a PSA AR-15 lower and a magazine? And ammo?
Thomas A on May 11, 2018
BEST ANSWER: Any mil-spec stripped lower should work. It does not have a rear iron sight so you'll need one of those or an optic to fire accurately, but functionally you only need this kit and a lower.
Is this a pencil barrel or the heavier barrel?
Darla2rocks on Feb 1, 2019
BEST ANSWER: Heavier profile, standard on what you may find on the A4s the military issues.
Is the A2 stock mil-spec (metal door latch)?
Steve S on Dec 12, 2018
BEST ANSWER: CORRECTION, unlike the original Colt, these are a very well made polymer that most manufacturers seem to be using. My Colt HBAR Sporter built in '92 has the same type.
what lower receivers work well on this build does any one has like part number or list of options ?
Adan P on Apr 28, 2018
BEST ANSWER: Any mil spec lower will work well I presonally use aero precision lowers on my builds but psa makes a great lower for not alot of money
Kit 7788893 does it have front sight included?
Mark G on Dec 4, 2018
BEST ANSWER: The front sight is connected to the end of the handguards/barrel towards the front of the muzzle (you can see it clearly in the picture. There is no rear sight included, which is what I assume you were asking about.
Is there a storage compartment in the buttstock?
Lifeguard bro on May 24, 2019
BEST ANSWER: Yes the standard sized compartment is there for storage of the GI cleaning kit or a spare parts kit.
Is this the triangle end cap or round end cap?
Yongkun D on Sep 27, 2018
BEST ANSWER: I've bought too many uppers from PSA and every end cap has been triangular. For those who say theirs is round, I'd want proof. But ANYWAY, most good quality handgurards will work with round or triangular end caps.
Do the handguards have heat shields?
Nicholas M on Mar 1, 2019
BEST ANSWER: Yes. Have heat shields but are oval. Personally don't care for them so ordered actual military handguards.
Can you install a suppressor on it?
Austin M on Nov 3, 2018
BEST ANSWER: It has a threaded barrel so it shouldn't be a problem, though you may want to add an adjustable gas block
Is the end cap by the front sight triangular or circular?
Bobby on Mar 4, 2019
BEST ANSWER: It is triangular. It is NOT the circular type found on the shorter barreled uppers.
What grain Ammo works best with this kit ?
Jonathon R on Mar 26, 2019
BEST ANSWER: The 20” barrel with a 1/7 twist was developed by the military for the M16A2 and paired with the XM855 (62 grain) for the best accuracy. I’ve only used the XM855 mainly because I have a surplus, however this barrel should handle heavier rounds without any issues. I definitely wouldn’t go any light than 62 grains.
Will this accept the m16 Bayonet?
Giggles on Mar 14, 2019
BEST ANSWER: Yes, it will. I have an M7 on mine, but the M9 will add Los work.
Is the bcg chrome lined?
Chad H on Jun 3, 2019
BEST ANSWER: Mine wasn’t.
Anyone know if this the same cold hammer forged barrel as item #516444711?
Thomas J on Feb 8, 2019
BEST ANSWER: No it isn’t. The barrel that came with my kit is marked “5.56 NATO 1/7”.
What is the barrel profile? Is an A2 profile thin under the handguards? Do they make a HBAR profile barrel in the rifle kits??
Dale B on May 24, 2019
BEST ANSWER: The barrel profile is the same from the exposed part all the way back to the barrel nut. It is the standard .750 barrel thickness. To my knowledge they do not make a HBAR version.
Does this come with a rear sight?
Joshua J on Mar 18, 2019
BEST ANSWER: Still no, just as when this was asked last time.
Hey, can I add a carry handle to this A4 upper, or do I need to get an A2 to have a handle?
Jason W on Mar 5, 2019
BEST ANSWER: Yes you can add a carry handle to the upper receiver
Is this a hammer forged barrel? FN or made in house at PSA? Thanks in advance.
Thomas J on Feb 8, 2019
BEST ANSWER: fn or made in house
Does it come with a carry handle?
Georgia_01 on Dec 28, 2018
Looking to buy this kit. Does anyone or can someone from PSA tell me who makes the barrel please? Want to know for quality and accuracy, Thank you.
Yann B on Dec 3, 2018
BEST ANSWER: It was gritty but took less than 2 mags to smooth out. Accuracy was average with standard ball ammo from 55 grn to 62 grn.
“Nitride finished barrel.” Does this mean the QPQ process? If it is, that’s great.
James S on Nov 27, 2018
BEST ANSWER: Yes, same process different name
What is the difference in this kit and the 7788893B kit?
Salty G on May 29, 2018
BEST ANSWER: Absolutely nothing other than cosmetic imperfections. The "B" stands for "Blemish"
BLEM PSA 20" Rifle Length 5.56 NATO 1/7 Nitride A2 Freedom Rifle Kit


4.7 / 5.0
187 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Nice kit slightly disappointed
I just received my 20inch kit and when I assembled it on an Anderson lower the trigger that came with the kit kept binding and seizing up and would not reset. I checked the hammer and disconnector for burs and didn't find anything unusual it may just be out of spec parts.
Luckily I had a spare trigger and hammer assembly which I installed with the PSA disconnector and it works fine now so at least I can use my kit in the match i'm shooting this weekend. I'm just disappointed that I had to use some of my extra parts to get the kit going.
July 3, 2019
2 weeks ago
Response from Palmetto State Armory
We do apologize for that. Please contact Customer Service so we may resolve this issue.
July 4, 2019
Casey S
Great Kit
Great kit at a great price what more can be said. Savagerrray
June 17, 2019
1 year ago
Love it!
Quality parts, good price, and great service from PSA. Bought this for better ballistics compared to my 10.5" and 16" and love the nostalgic a3/a4 look. Only negative was the buttstock was gray. Nothing a little flat black Krylon couldn't fix though. Fit well on my Anderson lower, no wiggle at all. If I was limited to only 1 AR, this would be it.
June 16, 2019
4 months ago
All around awesome kit. A Must Have!!!!
Great product, very good bolt carrier group, very good trigger assembly.
June 8, 2019
3 months ago
Most bang for the buck
worth the price no problems in assembly
June 2, 2019
3 months ago
Great for the money
I have enjoyed having the 20" AR. On the first range visit, I put 500 rounds through it. Only issue I have had is that my colt or DPMS extended charging handle doesn't fit. but very accurate 1.75" group at 100 yards.
User submitted image
User submitted image
May 31, 2019
3 months ago
Best money i ever spent on a AR platform. Took a long time and did my research. Time and mo ey well spent.
May 19, 2019
4 months ago
Accurate gun
This one is fun to shoot and the additional barrel length is good for reaching out and touching a target.
User submitted image
Added May 17, 2019
May 17, 2019
4 months ago
First AR 15
Love it......Fired a box of 223 thru it no jams...plan to Dec it out for some fun rifle and worth the purchase
May 11, 2019
4 months ago
Cant be beat.
Excellent value. After i lapped it 5x for accuracy and did a trigger job, it shoots 1.25" for 4 rounds off the bench at 100 yds, iron sights. Best value there is.
May 10, 2019
4 months ago

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