Yankee Hill Machine Q.D.S. Flip-Up Sight Set - M4 Style

Manufactured by Yankee Hill Machine
SKU: YHM-5040
MPN: YHM5040
Manufactured by Yankee Hill Machine
26 Reviews

In Stock

Standard orders will ship out 1 business day if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.

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The Yankee Hill Machine Quick Deploy Sight System are spring loaded iron sights that deploy at the push of a button. This YHM sight set for AR-15 or AR-10 platforms attaches directly to picatinny rail systems and this model features an M4 style front sight protective ears. Each back up iron sight is machined from aluminum and hardcoat anodized black. The rear sight is adjustable for windage while the front sight is elevation adjustable.

  • M4 style front sight
  • Machined from aluminum
  • Hardcoat anodized black
  • Push button activated
  • Spring loaded
  • Low profile when folded

Yankee Hill Machine stands by their products and meticulously inspect each product before they ship it out. Their quality assurance program adheres to strict military standards and use the most modern equipment. Not only are is the inspection equipment state of the art, but they manufacture their own tools to make sure that each part is machined precisely the way it needs to be. They have a highly skilled and diverse workforce that is committed to insure your satisfaction 100%. 
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BrandYankee Hill Machine
FinishHardcoat Anodized
Fixed FoldingFolding
Manufacturer.Yankee Hill Machine
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

26 reviews

  • 4 stars
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  • 1 star
  • 0 reviews

Excellent sight set


Their quality is immediately apparent, very low when down, every bit as nice as the Troy sights I've had in the past. Provides lower third co-witness with my Aimpoint Pro.

Top choice


Yankee Hill Machine flip up sites have been my first choice since my first AR build. They are compact and very well constructed. They lay very flat on the rail and do not obstruct my optics or mount. I have two other sets of flip up sites from two of the other very popular manufacturers. One set is mostly composite and are very good as well but sit higher on the rail when collapsed. The other set are high quality and made of steel but are about $30.00 more and I find no difference in shooting accuracy.

Excellent Product


Getting product as advertised. Primary Arm is by far one of the best companies i have had the pleasure ordering with. Very Fast shipping and i will definetly be doing business again.

Flip up yhm sights


Fast shipping and love the up to date stock system thanks ...ill be back

YHM QDS Iron Sight Set


Not my first set. I came back to these because of my great experience with a previous set I have been using. First rate, no question.

You get what you pay for.


I initially passed on these because of the price, but then I remembered YHM doesn't make anything half way so I got em. Overbuilt, tight, etc. Yup they are that good. Thanks PA!