BudsGunShop.com - Lower parts kit

Isaac, correct, this includes a Ambidextrous Bolt Stop Assembly but you will still need majority of a lowers part kit. Hope this helps.

Yes, this will need a lower build kit to complete. Below is a link to quite a few different kits to choose from depending on ones budget.
budsgunshop.com/search.php/q/lower+parts+kit

Hi Isaac and welcome. You are correct, this lower needs a Lower Parts Kit for a fully functional lower. Cheers and stay safe!

Isaac, the receiver contains a Seekins Precision Enhanced Bolt Catch, a receiver tensioning screw, an oversized trigger guard and includes an ambidextrous-bolt stop assembly. Custom screw-in dowel pins simplify your setup by eliminating the need for roll pins, hammers and punches. A quick-access magazine release and a beveled magwell allow for rapid magazine changes and work with most all AR magazines.
.
.
.
Seekins Precision SP223 Gen2 Lower Features and Specifications:
.
Manufacturer Number: 0011000008
AR-15 MIL-SPEC Lower Receiver
Material: CNC Machined 7075-T6 Billet Aluminum
Finish: Black Type III Class 2 Hard-Coat Anodized
Ambidextrous Bolt Release
Enhanced Bolt Catch
Ambidextrous Bolt Stop Assembly
Oversized Trigger Guard
Upper Tensioning Set Screw
Screw-In Pins
Bullet Pictogram Markings
Engraved SP Logo
Made in the USA
.
Stay safe & have a great day!