+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

I’m new to rifles and bought an Armalite DEF15 there was a DEF15F that had the front triangular sight but the DEF15 has no sights at all. Will thisfit — 3 Answers

by Kickb0xzr, from LA, United States Asked on March 11, 2018

Name Magpul Industries MBUS Front Flip-Up Back Up Sight Gen 2 (4.8)
As Low As $35.95 Save Up to 17%
View Product
Write a Review
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
Expert Answer
A
Answered by Jonathan D., Gear Expert, from IL, United States, on May 12, 2018

The Armalite DEF15 has a gas block with a picatinny rail, this sight will attach to it, however may not be the proper height as many gas block rails are lower than the receiver picatinny rail.

15 of 19 found the following answer helpful.
Was it helpful to you? Yes | No
Share
A
Answered by Jason, member, from CO, United States, on May 12, 2018

It will work... and then promptly melt when you decide to fire more than a few rounds in a short time span. Polymer sights are a no go on a gas block rail.

4 of 6 found the following answer helpful.
Was it helpful to you? Yes | No
Share
A
Answered by Ar15, guest, from SC, United States, on March 25, 2018

Yes I have the same ar, with red dot to they both work well together

Was it helpful to you? Yes | No
Share
Last updated 2026-03-30 UTC.