https://midstatefirearms.com/product/velocity-3lb-enhanced-ar-15-lower-parts-kit-lpk/

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Enhanced lower parts kit for Ar15. ( lpk )

Complete Enhanced Lower Parts Kit includes, Bolt Catch, Bolt Catch Plunger, Bolt Catch Roll Pin, Bolt Catch Spring, Buffer, Retainer, Buffer Retainer Spring, Hammer Pin, Magazine Catch, Magazine Catch Button, Magazine Catch Spring, Pistol Grip (A2 style), Pistol Grip Lock Washer, Pistol Grip Screw, Pivot Pin, Pivot Pin Detent, Pivot Pin Detent Spring, Selector, Selector Detent, Selector Detent Spring, Takedown Pin, Takedown Pin Detent, Takedown Pin, Detent Spring, Trigger Guard, Trigger Guard Roll Pin, Trigger Pin, 

In addition, included is a 3 lb drop in Velocity Trigger 
A high quality 3lb trigger that makes your AR feel like a bolt action rifle. 

• Single Stage Drop In Trigger
• 3 Lb Pull Weight
• Complete Drop-in Assembly
• Nice, crisp, clean feel

Add our optional Ar15 anti-rotation / anti-walk trigger and hammer pins. These pins will stay in place unlike some standard pins that tend to slide out of the receiver over time.  Great addition to your lpk / lower parts kit or drop in trigger assembly.

• Easy installation, tapered tip included to install pins in place without disassembling your lower.
• wrench included
• Pins lock securely in place, great for added reliability. 

Everything you need to complete a lower, other than the stock/buffer kit.

Not for use with 9mm