AR15 Stripped Lower Receiver, STS - Anodized Black

Aero Precision AR15 Stripped Lower Receiver Short Throw Safety

AR15 Stripped Lower Receiver, STS - Anodized Black Product Sku: APAR501103C
Must Be Shipped to FFL Dealer

The STS (Short Throw Safety) AR15 Stripped Lower Receiver is the perfect lower to start your build. Custom designed markings accept short-throw safety selectors while maintaining mil-spec dimensions and correct component interface. Selector markings will work with 45, 60 or 90 degree safety selectors.

STS lowers are marked and milled to accept short-throw safety selectors, but will work with standard selectors as well!


  • Stripped AR15 Lower Receiver, STS

FFL Terms and Conditions

- Any items placed on the same order as a controlled item will also be shipped to the FFL. If you would like additional items shipped to you directly, please place them on a separate order.

- Please enter your information or the receiving party's (the person that will be picking it up) information under "Recipient Name" while checking out. There will be a seperate field for FFL name, phone and zip code and we will obtain the shipping address directly from them.

- To expedite your order, please have your dealer fax or email their FFL to us. If the dealer you are using to transfer a firearm has not sent us a currently updated FFL to put on file, there will be an extended period of time needed to process your order.

Fax: 253-272-1168 | Email:

There will be a 30% restocking fee on all controlled items returned because of failed background checks.

Federal law requires that you be 21 years or age or older to purchase a stripped receiver or frame. If a frame or receiver can only be made into a long gun (rifle or shotgun), it is still a frame or receiver not a handgun or long gun. However, they still are "firearms" by definition, and subject to the same GCA limitations as any other firearms. See Section 921(a)(3)(b). 18 U.S.C. Section 922(b)(1) makes it unlawful for a licensee to sell any firearm other than a shotgun or rifle to any person under the age of 21.

Made In America? Yes
Platform AR15
Material Machined from 7075-T6 forged aluminum
Finish Anodized Black
Markings "Cal Multi"
Compatibility Works with standard AR15 components and magazines
Weight(s) 8.35oz
Other Rear takedown pin detent hole is threaded for a 4-40 set screw

Customer Reviews

1 Item(s)

STS Lower Reciever Review by Douglas
This Lower receiver is set up for the Battle Arms Development Ambidextrous Short Throw Safety. It has the pictographs for the STS and the cutout for the "lawyer pin" on the shaft of the safety selector. If you want to use a B.A.D.A.S.S. this is the "legal" way to do it. While this is not exactly a cheap way to go, it does effectively mimic the controls on an enhanced 1911. My build also included a Geissele G2S two stage trigger, so between the safety, and trigger, it is very 1911ish. If you are a 1911 shooter this will be very familiar. I am quite happy with the results. All it takes is a sweep of the thumb or trigger finger to operate the safety. As usual, the Aero Precision fit and finish are top notch. (Posted on 11/25/2015)

1 Item(s)

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