+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! 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 Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Bushmaster QRC II LTW Upper Assembly 00-40017-BLK Caliber: .223 Remington, 5.56x45mm NATO, 10% Off w/ Free Shipping

Special offer available for this product. Click here to see!
Limited Time Offer. Click here to see!
Bushmaster QRC II LTW Upper Assembly, 16in, 5.56 NATO/.223 Remington, Black, 00-40017-BLK
Bushmaster QRC II LTW Upper Assembly, 16in, 5.56 NATO/.223 Remington, Black, 00-40017-BLK
Bushmaster QRC II LTW Upper Assembly, 16in, 5.56 NATO/.223 Remington, Black, 00-40017-BLK
1 of 2 images
Bushmaster QRC II LTW Upper Assembly, 16in, 5.56 NATO/.223 Remington, Black, 00-40017-BLK
Bushmaster QRC II LTW Upper Assembly, 16in, 5.56 NATO/.223 Remington, Black, 00-40017-BLK
2 of 2 images
Bushmaster QRC II LTW Upper Assembly, 16in, 5.56 NATO/.223 Remington, Black, 00-40017-BLK

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
You May Also Like
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
(41)
List: $17.95 $16.95 Save Up to $1.00
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
(44)
List: $12.95 $11.95 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, Black, 1 Pack, Polymer, MGMPI557BLK-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI557BLK-30RD
(26)
List: $14.95 $13.95 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, 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
(41)
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
(26)
List: $14.95 $13.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD
(17)
List: $14.95 $13.95 Save Up to $1.00
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
(9)
List: $22.95 $20.45 Save Up to 11%
Blazin' Deal Strike Industries Rifle Magazine, AR-15, .223 Remington/5.56 NATO, 33 Round, Smoke Gray, 1 Pack, Polymer, SI-AR-MAG-33RD
Strike Industries Rifle Magazine, AR-15, .223 Remington/5.56 NATO, 33 Round, Smoke Gray, 1 Pack, Polymer, SI-AR-MAG-33RD
(10)
List: $26.99 $12.29 Save Up to 12%
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
(11)
List: $15.95 $14.95 Save Up to $1.00
Amend2 Banana Mod-2 Magazine, AR-15/M4/M16, 5.56x45mm NATO/.223 Remington, 30 Round, Yellow, 1 Pack, Polymer, 556BANANA30-30RD
Amend2 Banana Mod-2 Magazine, AR-15/M4/M16, 5.56x45mm NATO/.223 Remington, 30 Round, Yellow, 1 Pack, Polymer, 556BANANA30-30RD
(1)
List: $27.99 $25.19 Save Up to 10%
Questions & Answers
Caliber: .223 Remington , 5.56x45mm NATO Barrel Length: 16 inGas System Length: Carbine Length Barrel Twist Rate: 1-7 Threads per Inch: 1/2x28 Muzzle Device: A2 Flash Hider Color: Black

Code: 6C5-UFH-QRC216-00-40017-BLK

MPN: 00-40017-BLK

UPC: 604206201324

List: $577.95Save 10%
$519.76

ATTENTION! We currently do not ship this product to AK, CA, HI, IL, NY, WA, P.O. Boxes, and U.S. Territories. Please see our policies for more information.

Product Info for Bushmaster QRC II LTW Upper Assembly

Introducing the Bushmaster QRC II (Quick Response Carbine), the perfect complete upper assembly for anyone looking for reliability, accuracy, and ease of use. Built to the highest standards, this upper assembly is perfect for the range, or at home. The Bushmaster QRC II features a caliber of 5.56 NATO (.223REM) and a carbine-length gas system. The 16 4150 CMV Salt Bath Nitride Pencil Barrel, with a 1:7 Twist Rate, and ? x 28 Thread Pitch, provides both accuracy and power. The QRC II's Salt Bath Nitride MPI Bolt Carrier Group ensures that the upper assembly will fire reliably time after time. The Bushmaster QRC II also features a 7075 Forged A4 Flattop Upper Receiver, allowing for the integration of any optic you prefer. Originally designed for use of only a red dot optic, the QRC II improves upon the PROVEN, lightweight and reliable design of the original QRC with more modern solutions that allow for full customization of your rifle. The Bushmaster 14 Free Float Rail ensures you can add your favorite accessories. The Bushmaster QRC II is the perfect choice for anyone looking for a reliable, accurate, and lightweight upper assembly. Whether you're at the range or in the field, the QRC II is sure to impress. So why wait? Get yours today and experience the Bushmaster difference!image

WARNING: California`s Proposition 65

Specifications for Bushmaster QRC II LTW Upper Assembly:

Manufacturer: Bushmaster
Caliber: .223 Remington, 5.56x45mm NATO
Barrel Length: 16 in
Gas System Length: Carbine Length
Barrel Twist Rate: 1-7
Threads per Inch: 1/2x28
Muzzle Device: A2 Flash Hider
Color: Black
Fabric/Material: 7075 Aluminum
Gun Type: Rifle
Gun Make: AR Platform
Magazine Included: No

Features of Bushmaster QRC II LTW Upper Assembly

  • Upper Receiver Material
  • 7075 Aluminum Alloy Upper Receiver
  • A4 Flat Top Bolt Carrier Group Finish
  • Salt Bath Nitride Bolt
  • MPI Tested Handguard
  • BFI 14 M-LOK Handguard Muzzle Device
  • A2 Flash Hider Front Sight
  • None Rear Sight

Package Contents:

  • Bushmaster QRC II LTW Upper Assembly

Bushmaster QRC II LTW Upper Assembly Orderable Models

List of Orderable Models

  • Bushmaster QRC II LTW Upper Assembly, 16in, 5.56 NATO/.223 Remington, Black, 00-40017-BLK , MPN: 00-40017-BLK , UPC: 604206201324 , Code: 6C5-UFH-QRC216-00-40017-BLK
Compare (0)
1 item has been added
Add at least two items to compare