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5.56 Freedom AR15 Build Kit (16″ Barrel & M-Lok Handguard) with Fire/Safe 80% Lower

$699.95 $500.00 (You Save $199.95)

5.56 Freedom AR15 Build Kit (16" Barrel & M-Lok Handguard) with Fire/Safe 80% Lower
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Free Shipping on all orders $325+!

SKU: 2231618(SS)-MLOK(135)-KIT-FORGED


16” Mid-Length Stainless Rifle Kit w/ Lightweight 13.5” M-Lok Handguard

If you’re gunning for the most accuracy possible out of a prebuilt, factory upper, look no further. This 16” mid-length rifle kit featuring a 416R stainless barrel offers the tightest groups possible, without visiting the smith for custom benchwork.

416R rifle steel provides the best machinability and the smoothest, most consistent rifling out of any gun maker’s factory, letting you hit sub-MOA groups with factory loads at 100 yards – if you’re good enough to take full advantage of this kit, that is.

A lightweight, free-floated M-Lok handguard ensures your bipods, forward grips, tac-lights and other accessories have a home without killing accuracy by sagging your barrel. A mid-length gas system reduces felt recoil and ensures your rifle runs smoother than a carbine system. Everything’s prebuilt and measured to spec, ensuring your rifle kit’s ready to fire out of the box, no adjustments needed.

The included full-auto bolt carrier group, 1:8 twist rate, forged upper, and complete lower parts kit ensure reliable, smooth operation with any loads you fire.


Build Kit Specs

Gas System: Mid-length
Barrel Profile: A2 Style
Barrel Steel: 416R
Barrel Finish: Stainless Steel
Chrome Lining: No
Muzzle Thread: 1/2-28
Chamber: 5.56 NATO
Twist Rate: 1:8
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
Handguard Type: 13.5″ Lightweight M-Lok Free Float
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-auto
Charging Handle included: Yes
Overall Length: 24.5″

Benefits of the 16” Mid-Length SS Build Kit

  • 100% legal to own and ship to your front door
  • Not considered a firearm – no FFL paperwork needed!
  • 416R stainless barrel and Freedom parts kit ensure sub-MOA accuracy
  • Prebuilt upper with gas system removes the guesswork of rifle making
  • Includes full-auto bolt carrier group, free-floated M-Lok handguard

Need a California-Compliant Build Kit? Follow These 4 Steps!

1. Choose “CA-Compliant Lower Parts Kit” in the Lower Parts Kit dropdown.

2. Choose the “No Lower Receiver” option for the 80% Lower Receiver dropdown.

3. Select/Click “Add to Build”.

4. Head here to purchase a California-compliant 80% lower receiver

Please note: This AR-15 Build Kit requires that the builder completes the 80% lower receiver themselves, but that’s the fun part (and the only way to build your own AR-15 without the need of an FFL transfer or serialization).

No FFL required Made in the USA Lifetime Warranty

5.56 Freedom AR15 Build Kit (16″ Barrel & M-Lok Handguard) with Fire/Safe 80% Lower

$699.95 $450.00 (You Save $249.95 )

$699.95 $450.00 (You Save $249.95 )
Save For Later
Save For Later

Free Shipping on all orders $325+!

Customer Reviews

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chris d.

first one !

yes! everything was delivered timely looked good no damage and was able to assemble as described absolutely love shooting this gun doing very well on the targets with cheep ammo ( : THANKS


Stainless 5.56 freedom build kit with m-lock handguard

This being my first build , I was surprised how easy this was to do . Now have to save money to trick out my build.

Paul S.

AR 15 standard rifle kit flat top

The rifle was fully assembled with no issues in less than 1 hour. It completely function checked and we already had it on the range at 200 yds shooting 3 inch groups!



Quality kit, it went together very smooth and it looks great! Can't wait to hit the range! Also their appreciated the customer service when I would call with questions and the weekly email was a nice touch while I waited for it to ship out. Once shipped I received status updates and got here in a couple days. I look forward to doing business again in the near future.


Broken Promises, misleading product description, missing part

I don't believe I will ever buy from 80 lowers again.


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