Yankee Hill Machine Billet AR-15 Stripped Lower Receiver

Manufactured by Yankee Hill Machine
Manufactured by Yankee Hill Machine
3 Reviews

In Stock

Standard orders will ship out within 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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Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal-Firearm License holder.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to ffl@primaryarms.com.



YHM is proud to offer their Model-57 Billet lower receivers. These lowers are machined 100% in house from 7075-T6 aluminum. They feature over sized magazine well chamfers for easier magazine changes. The Yankee Hill Machine Billet AR-15 Stripped Lower Receiver is the feature rich building block for your new premium build.

  • Billet 7075-T6 aluminum
  • Hardcoat anodized black
  • Integral trigger guard
  • Flared magazine well
  • Mil-Spec compatible
  • Receiver tension screw
  • Compatible with all generation PMAGS
  • 100% machined in house
  • Weight: 11.2 oz

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%.Â
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BrandYankee Hill Machine
Caliber MarkingMulti-Caliber
FinishHardcoat Anodized
Manufacturer.Yankee Hill Machine
Receiver Material7075-T6 Aluminum
Trigger Pin DiameterMIL-SPEC .154
Weight0.1 Oz
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

3 reviews

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Yankee Hill Billet Lower


Fit and finish is awesome this is a great choice for anyone that loves quality looking products.

Slick lower


Very nice lower. Milspec parts kit and B5 pistol grip fit perfectly. Matched nice to my YHM forged upper. This lower also includes a tension screw in the lower to help with lower and upper fit so there is no wiggle. This is concealed under the pistol grip. This billet lower is noticeably heavier than a forged lower.

Super Sexy Lower


This is a slick appearing lower receiver. If you're wanting something that breaks away from the norm is unique without being outrageous then this is for you. On my 10.5" suppressed build. I find that the widened magazine well helps me better localize magazine placement and the contour allows for crisp reloads. All custom/milspec parts that I ordered fit well. It's sleek design definitely stands out from your typical mil-spec designs and will have fellow shooters admiring your build. Definitely worth the money and I have no regrets.