+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

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.

  • 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

Q&A for Radical Firearms Complete Upper Assembly 16in 6.8 SPC II w/ A2 Flash Hider — 15 Questions & 12 Answers

Name Radical Firearms Complete Upper Assembly 16in 6.8 SPC II w/ A2 Flash Hider (5)
Currently Unavailable View Product
Write a Review
If you have questions regarding availability, pricing, shipping options for this item or need an answer right now, please contact our customer service team.
Continue As a Guest
Saving...
Sign In or Create an Account (optional)
or Register
Why use an OpticsPlanet.com account for my questions and answers?

Having an account with OpticsPlanet.com makes writing questions and answers even better! We’ll save all of your questions and answers in your account, provide you easy access to them, so you can see how the community has responded.

If you’d like to add a question without creating an account, you can proceed with filling out the fields on this form.

Show
Sort by
Filter by
Q
Mr. Smith, guest, from CA, United States, asked on June 17, 2022

Will this upper fit a LWRC SIX8 lower and the subsequent SIX8 magazines

Expert Answer
A
Answered by Hunter, Gear Expert, from OH, United States, on July 05, 2022

The Radical Firearms Complete Upper Assembly 16in 6.8 SPC II w/ A2 Flash Hider will work with Mil-Spec lowers. So it will work with the LWRC SIX8 Lower with the SIX8 magazines.

0 of 1 found the following answer helpful.
Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
nathan, guest, from GA, United States, asked on May 10, 2022

what type of steel is the barrel

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on June 27, 2022

The Radical Firearms Complete Upper Assembly 16in 6.8 SPC II w/ A2 Flash Hider features a 4140 Chrome Moly Vanadium, Medium Contour Profile barrel. It has a 1:11 twist.

Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
N8te, member, from FL, United States, asked on January 17, 2022

Is this a mid length gas system?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on February 02, 2022

Yes. The Radical Firearms Complete Upper Assembly 16in 6.8 SPC II w/ A2 Flash Hider is a mid length gas system.

Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
James Finley, member, from KY, United States, asked on April 22, 2021

What length is the gas tube ?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on June 27, 2022

The Radical Firearms Complete Upper Assembly 16in 6.8 SPC II w/ A2 Flash Hider includes a low profile 0.750" gas block.

0 of 1 found the following answer helpful.
Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
James, guest, from KY, United States, asked on April 12, 2021

Will this work on my ruger lower?

A
Answered by RJ, guest, from CA, United States, on June 03, 2022

Fits standard AR15 lowers.

Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
James, guest, from KY, United States, asked on October 01, 2020

What are the specs on the barrel?, materials lining etc?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on June 27, 2022

The Radical Firearms Complete Upper Assembly 16in 6.8 SPC II w/ A2 Flash Hider features a medium contour profile, 4140 Chrome Moly Vanadium barrel with M4 feed ramps and 1:11 twist.

Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
MAK, member, from TX, United States, asked on December 24, 2019

Does this come with a forward assist and a dust cover?

Expert Answer
A
Answered by Brandon B, Gear Expert, from IL, United States, on November 18, 2021

Yes it does come with those items.

Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
Keith, guest, from TX, United States, asked on May 01, 2019

DOES THIS COME WITH BCG AND CHARGING HANDLE?

Expert Answer
A
Answered by Armando R., Gear Expert, from IL, United States, on November 22, 2019

Yes, it will come with the bolt carrier group and charging handle.

14 of 14 found the following answer helpful.
Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
Noah, guest, from NC, United States, asked on February 16, 2019

Can this upper fit on my smith and Wesson m&p 15 sport 2

Expert Answer
A
Answered by Armando R., Gear Expert, from IL, United States, on November 22, 2019

Yes, this will work on a standard AR-15 lower receiver.

2 of 2 found the following answer helpful.
Was it helpful to you? Yes | No
Share
Submit Your Answer
Q
gene, guest, from WA, United States, asked on February 12, 2019

does this upper come in a 20" version

Expert Answer
A
Answered by Armando R., Gear Expert, from IL, United States, on November 22, 2019

It does not. Radical Firearms only offers uppers in 6.8SPC in a max 16" barrel.

Was it helpful to you? Yes | No
Share
Submit Your Answer
Last updated 2025-11-12 UTC.