Mil-Spec AR15 Lower Parts Kit (w/ Hammer and Trigger)
$39.99
92 in stock
Ships next business day
Financing available on $300+ orders
Specifications
| Attributes | Value |
|---|---|
| Weight | 0.69 lbs |
| Dimensions | 6 × 6 × 3 in |
| Platform |
AR15, AR9 |
| Caliber |
.223 Wylde, .300 AAC Blackout, 5.56, 6.5 Grendel, 9mm |
Description
Want an AR-15 trigger that suffers no creep, take-up, or over-travel? Looking for the easiest-to-install LPK? How about the most affordable parts kit possible? This mil-spec AR-15 LPK comes in at a great price with machining and performance that feels match-grade.
Polished for Performance
Inside this kit, you’ll find a disconnector, hammer hook, and sear that were laser-cut and polished to break as clean as glass at exactly 4.5 pounds.
The trigger affords perfect reset after every pull, with no break-in required. Every roll pin presses easily, while the hammer and trigger pins glide in with little effort.
Complete AR-15 LPK with Pistol Grip
This AR-15 Lower Parts Kit includes all components required for assembling your AR-15 stripped lower receiver:
- Bolt Catch
- Bolt Catch Plunger
- Bolt Catch Roll Pin
- Bolt Catch Spring
- Buffer Retainer
- Buffer Retainer Spring
- Disconnector
- Disconnect Spring
- Steel Hammer
- Hammer Pin
- Hammer Spring
- 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
- Trigger Guard
- Trigger Guard Roll Pin
- Trigger Pin
- Trigger Spring
Required Tools
To install all the components listed above, you’ll need a pair of roll pin punches and a gunsmithing hammer. An Armorer’s Wrench is recommended for installing the buffer assembly (sold separately, see details below).
Grab everything you need from our Gunsmithing Tools.
Easy-to-Follow Install Instructions
First time assembling, or need assistance with certain steps? Check out our in-depth instructional and picture guide. It shows the full LPK assembly with tips and tricks, including tools required and the buffer tube and castle nut install.
Buffer Assembly Sold Separately
Finishing Your Custom AR-15 Build
Additional information
| Weight | 0.69 lbs |
|---|---|
| Dimensions | 6 × 6 × 3 in |
| Platform | AR15, AR9 |
| Caliber | .223 Wylde, .300 AAC Blackout, 5.56, 6.5 Grendel, 9mm |
127 reviews for Mil-Spec AR15 Lower Parts Kit (w/ Hammer and Trigger)
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 Restrictions
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.







Thomas Roberts –
LPK was a good choice, everything worked great. Thank you.
Darryl Campbell –
It seems like it’s going to work out well. Smooth pull not gritty
David Huggins –
Good kit. tried others but this is the best for the money!
Joseph Szuch –
Exactly as it should be, no issues
David Huggins –
Great kit, great company.
Dashalys Fuentes –
Work perfect like it should
Brad Howren –
Bought as backup parts now that gov is getting even stupider.
Adam jeran –
Excellent value and quality. Went together smooth and shipped lightning fast.
Braxton Murray –
Great!
Clayborne Moore –
I ordered 3 parts kits. Quality of the parts is excellent but 1 of the kits came with 2 rear takedown pins and no forward pin. sent email and response was quick. Will get a replacement out to you ASAP. THEN got message describe problem, take photo’s of parts and packing slip. Did that on 27th. Have heard nothing further. Some form of communication would be nice. Service?