Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
You May Also Like
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
(48)
List: $12.95 $11.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI556BLK-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI556BLK-30RD
(45)
List: $17.95 $16.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
(29)
List: $14.95 $14.19
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
(11)
List: $22.95 $20.45 Save Up to 11%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
(45)
List: $17.95 $16.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
(12)
List: $15.95 $14.95 Save Up to $1.00
Coupon Available PMC Ammunition 556K X-Tac, 5.56x45mm NATO, 62 grain, Light Armor Piercing, Brass, Centerfire Rifle Ammo, 20, 5.56
PMC Ammunition 556K X-Tac, 5.56x45mm NATO, 62 grain, Light Armor Piercing, Brass, Centerfire Rifle Ammo, 20, 5.56
(108)
List: $14.99 $11.29 Save Up to 25%
Blazin' Deal TRYBE Defense 16 in Blackout Government Profile AR Carbine Barrel, .300, 5/8X24 Threads, Nitride, Black, BARCARBT16300
TRYBE Defense 16 in Blackout Government Profile AR Carbine Barrel, .300, 5/8X24 Threads, Nitride, Black, BARCARBT16300
(11)
List: $179.99 $120.49 Save Up to 33%
Best Rated TRYBE Defense 16 in Wylde Government Profile AR Carbine Barrel, .223 Wylde, 1/2X28 Threads, Nitride, Black, BARCARBT16223
TRYBE Defense 16 in Wylde Government Profile AR Carbine Barrel, .223 Wylde, 1/2X28 Threads, Nitride, Black, BARCARBT16223
(23)
List: $172.99 $119.99 Save Up to 31%
Free 2 Day Shipping TRYBE Defense AR-15 M-LOK 15in Extra Lightweight Handguard w/ Cut Away Rail, Black, 15 Inch, HDG15CR-BL
TRYBE Defense AR-15 M-LOK 15in Extra Lightweight Handguard w/ Cut Away Rail, Black, 15 Inch, HDG15CR-BL
(91)
List: $159.99 $109.99 Save Up to 31%
Questions & Answers
Does it come with a barrel nut? Expert Answer

Yes, the TacFire Unassembled AR-15 16in Rifle Build Kit includes a barrel nut. It also includes:
(1) 16" Barrel 1:8 Twist/Parkerized (USA Made)
(1) 5.56 NATO Bolt Carrier Group (USA Made)
(1) Slim Mlok Free Float Hand Guard15" (USA Made)
(1) Lower Parts Kit w/Trigger & Hammer-(USA Made)
(1) Mil Spec 6-Position Stock
(1) .750 Gas Block
(1) Carbine Length Gas Tube
(1) Standard Receiver End Plate
(1) Mil-Spec/Commercial Castle Nut/Steel
(1) Mil-Spec Buffer Tube/Alum.
(1) 3 oz. Buffer
(1) Buffer Tube Spring
(1) Mil-Spec Charging Handle Alum.
(1) Dust Cover
(1) Forward Assist
(1) A2- 1/2"x28 Thread Bird Cage A2 Muzzle Brake
(1) A2 Pistol Grip/Black (USA Made)
(1) Upper Receiver 5.56/.233/.300AAC, M4 Feed Ramps (USA Made)

by Ethan, Gear Expert, August 19, 2022
Is the tacfire RK 5.56 - LPK an AR-15 it does not say AR-15.

It is a build kit, to have a completed rifle you will need a standard stripped lower and a magazine,

by Dan, Verified Owner, August 9, 2021
Customer Reviews
Helpful Positive Review
Nice Product by Mike H, Verified Owner, February 28, 2023
Great product for the price, it’s gonna make a great truck gun. Build the AR in about an hour. And put 60 rounds through it with no issues. Be careful opening the packages. Some of the parts are extremely small.
7/7 found this helpful
Read 1 Review
Color:
Black
Caliber:
.223 Remington, 5.56x45mm NATO
Gun Make:
AR Platform
Gun Model:
AR-15, M4
Included Accessories:
Standard
Condition:
New

Code: 29U-LPK-RK556LPK

MPN: RK556-LPK

UPC: 811261029019

List: $399.99Save $20.00
$379.99

Buy Together and Save

OP Bucks$7.60

Product Info for TacFire Unassembled AR-15 16in Rifle Build Kit

The TacFire Unassembled AR-15 Complete Rifle Kit is an effective way to modify your rifle. With a 1:8 twist rate, your new firearm will stabilize everything from 55-grain range ammo to 69 plus grain match projectiles. With the mil-spec fire control group, you'll get positive ignition with steel-cased ammo with a traditional 5 to 6-pound trigger pull. And the free-floating handguard will keep your groups tighter than a standard M4 style upper. Once these AR15 Lower Parts are assembled, the free-floating barrel has excellent accuracy potential. The TacFire AR-15 Complete Rifle Kit has everything you need for a reliable AR-15 build.image

WARNING: California`s Proposition 65

Specifications for TacFire Unassembled AR-15 16in Rifle Build Kit:

Manufacturer: TacFire
Color: Black
Fabric/Material: Aluminum, Steel
Caliber: 5.56x45mm NATO, .223 Remington
Gun Make: AR Platform
Gun Model: M4, AR-15
Gun Type: Rifle
Included Accessories: Standard
Condition: New
Muzzle Device: A2 Flash Hider
Handguard Length: 15 in
Charging Handle Included: MIL-SPEC
Gas Block Journal Size-Diameter: .750 in
Barrel Twist Rate: 1-8
Handguard Type: Free-Float
Threads per Inch: 1/2x28
Gas System Length: Carbine Length
Gun Rail: Picatinny, M-LOK
Bolt Carrier Group Included: MIL-SPEC

Features of TacFire Unassembled AR-15 16in Rifle Build Kit:

  • Build a complete AR-15 that can do it all at an excellent price point with Tacfire;
  • This kit ships to your door unassembled, with everything you need, less your choice in lower receiver to make a range-ready rifle;
  • With a reliable carbine-length gas system and a free-floated barrel, this kit will come together into a gun that's ready to run

Package Contents:

  • TacFire Unassembled AR-15 16in Rifle Build Kit
  • 16" Barrel 1:8 Twist/Parkerized
  • 5.56 NATO Bolt Carrier Group
  • 15" Slim M-LOK Free Float Hand Guard
  • Lower Parts Kit w/Trigger & Hammer
  • Mil Spec 6-Position Stock
  • .750 Gas Block
  • Carbine Length Gas Tube
  • Standard Receiver End Plate
  • Mil-Spec/Commercial Castle Nut/Steel
  • Mil-Spec Buffer Tube/Alum
  • 3 oz. Buffer
  • Buffer Tube Spring
  • Mil-Spec Charging Handle Alum
  • Dust Cover
  • Forward Assist
  • A2- 1/2"x28 Thread Bird Cage A2 Muzzle Brake
  • A2 Pistol Grip/Black
  • Upper Receiver 5.56/.223, M4 Feed Ramps

TacFire Unassembled AR-15 16in Rifle Build Kit Orderable Models

List of Orderable Models

  • TacFire Unassembled Rifle Build Kit, AR-15, 5.56x45mm NATO, 16in Barrel, 15in Handguard, 1-8 Twist, 1/2x28, A2 Birdcage, Black, RK556LPK , MPN: RK556-LPK , UPC: 811261029019 , Code: 29U-LPK-RK556LPK
Compare (0)