No 80% lower receiver build is complete without all its components. This LPK comes with everything you need: A lower parts kit, butt stock, and buffer tube assembly. All parts are US-made and CNC machined for precision fitment. All trigger components are mil-spec.
This Lower Parts Kit Includes:
- Hammer
- Pistol Grip
- Trigger
Pivot & Takedown
- Pivot Pin
- Pivot Pin Detent
- Pivot Pin Detent Spring
- Takedown Pin
- Takedown Pin Detent
- Takedown Pin Detent Spring
Bolt Catch & Buffer Retainer Assembly
- Bolt Catch
- Bolt Catch Plunger
- Bolt Catch Roll Pin
- Bolt Catch Spring
- Buffer Retainer
- Buffer Retainer Spring
Trigger & Hammer Assembly
- Hammer Pin
- Hammer Spring
- Trigger Pin
- Trigger Spring
- Disconnect
- Disconnect Spring
Magazine & Trigger Guard
- Magazine Catch
- Magazine Catch Spring
- Magazine Release Button
- Trigger Guard
- Trigger Guard Roll Pin
Safety Select & Pistol Grip Connect
- Safety Selector
- Selector Detent
- Selector Detent Spring
- Pistol Grip Lock Washer
- Pistol Grip Screw
Butt Stock Kit Includes:
- Six-position adjustable carbine stock
- Mil-spec carbine buffer tube
- Mil-spec carbine buffer
- Recoil spring
- Castle nut
- Latch plate
This kit is intended for rifle configurations. It is illegal to install a buttstock on an AR-type pistol without prior approval from the ATF, as this constitutes the making of a short-barreled rifle.
Install Instructions
Follow our step-by-step picture and video guide to install your AR-15 Lower Parts Kit. You'll also need some basic tools, like an Armorer's Wrench, and Roll Pin Punches with a Gunsmithing Hammer.
Guide: How to install the AR-15 lower parts kit.
Completing Your AR Build
With a finish lower receiver, you can either piece together a custom upper, or buy a barreled upper assembly that's ready to go out of the box. Our barreled uppers include high-quality barrels, handguards, and mil-spec bolt carrier groups with charging handles included.
Buy a Barreled Upper Assembly here.
WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov
Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily.
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.
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- Platform:
- AR15
- Caliber:
- 5.56
- Caliber:
- .223 Wylde
- Caliber:
- .300 AAC Blackout
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