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.







Phillip Gwara –
Everything from 80% is top quality. Lowers are excellent. Bought 2 and ordered the parts kit for one of them. Best kit I have ever installed. Will be purchasing these for future builds.
David Evans –
The Anderson Lower Parts Kit (LPK) came packaged for a show room display. Fast and free shipping and the LPK installed with a perfect fit. The price was the lowest I have seen in a long time. Thank you 80% Lower for an awesome deal!!!
MARK DEAVER –
As described great value ??
Glenn DeVolder –
I had bought a set awhile back, liked them well enough when I saw them on sale, I bought more. If any builder is looking for good parts or replacements for the old stuff, BUY THESE, YOU WON’T BE SORRY. I give these parts a #10 in rating. (#10 is GRATE)
Donald Todd –
Well satisfied with product and process. Problem with tracking during shipping as product was delivered almost before shipping notice was given.
James Taylor –
Wow – what a great value. Using this kit to finish off a couple of builds. the stainless hammer and trigger are nice looking. With a little finishing, the trigger is smooth – not a custom 2 lb. trigger, but more than effective.
T W N –
Even if this kit cost twice as much I’d still use it as my LPK of choice. Have build six AR’s over the last decade from various brands and this parts kit has worked better than any other kit. Normally the hammer, sear and trigger need some break-in (had to sand one kit with steel wool to get trigger to reset) but this trigger/hammer worked flawlessly. Have dealt with some sh*tty roll pins too, the pins in this kit are just barely tapered on each edge to make tapping them in easy, no scratching up the anodizing on the lower. Be sure to use punches either way. Trigger squeeze is smooth, crisp, cant go wrong for the price. Is my LPK of choice from now on.
Allen M. –
Aside from being a great price point, this is a quality product from a trustworthy brand. Everytime I buy from these guys I know exactly what I’m getting!
Nathan Sherlock –
haven’t even used yet.
Chris S. –
Excellent lower parts kit. Price is right. Fast shipping. Easy install.