Guntec USA AR-15 Builders Kit w/Ambidextrous Safety contains most of the parts you need to build your AR-15. This Guntec USA Parts Kit features a multi-position short throw ambidextrous safety. Complete AR-15 Builders Kits come in a black color and include a Mil-Spec buffer tube, bolt catch, magazine catch, pivot pin, takedown pin, magazine release button, bolt catch spring, magazine catch spring, receiver pivot detent, receiver take down detent, bolt catch plunger, bolt catch pin, selector detent spring, receiver pivot pin, take down pin, magazine release button, bolt catch plunger pin, selector detent spring, 1 bolt catch pin, 1 bolt catch plunger pin, selector detent spring, receiver pivot detent spring, one take down detent spring, 1 multi position short throw ambi safety. Whether you are building your first AR-15 rifle or looking to modify an existing rifle, this complete AR-15 Builders Kit has everything you need. Use the AR-15 Parts Kit for Builders to create a reliable and versatile AR platform. Specifications for Guntec USA AR-15 Builders Kit w/ Ambidextrous Safety: Manufacturer: Guntec USA Caliber: .223 Remington Gun Make: AR Platform Gun Model: AR-15 Condition: New Package Contents: Guntec USA AR-15 Builders Kit w/ Ambidextrous Safety 1 Anodized Mag Catch Lever 1 Bolt Catch 1 Anodized Takedown Pin Set 1 Magazine Catch Spring 2 Trigger Pins 1 Buffer Retainer 1 Anodized Magazine Release Button 1 Bolt Catch Spring 1 Buffer Retainer Spring 1 Selector Detent 2 Take Down/Pivot Detents 1 Bolt Catch Plunger 1 Bolt Catch Pin 1 Selector Detent Spring 1 Receiver Pivot Detent Spring 1 Take Down Detent Spring 1 Anodized Multi Position Short Throw Ambi Safety