A1Armory 31 piece Lower Parts Kit

(4 reviews) Write a Review
MPN:
LPK-17-NG
Condition:
New
Minimum Purchase:
1 unit
Shipping:
Calculated at Checkout
$44.96
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Description

A1Armory AR-15 Lower Parts Kit

 

 

 

Upgrade your AR-15 build with confidence using the A1Armory AR-15 31-Piece Lower Parts Kit — a complete, precision-machined solution for builders and enthusiasts who demand performance, reliability, and seamless assembly. Whether you're starting a new build or refreshing an existing lower receiver, this kit includes everything you need to get the job done right.

? Compatible with all standard mil-spec AR-15 lower receivers

? Ideal for new builds or replacement of worn components

? Machined to exacting specifications for flawless fit & function


What's Included – 31 Precision Components

Bolt Catch Assembly

✅ Bolt Catch
✅ Bolt Catch Plunger
✅ Bolt Catch Roll Pin
✅ Bolt Catch Spring

Buffer Retainer Group

✅ Buffer Retainer Pin
✅ Buffer Retainer Spring

Detent Springs & Pins

✅ 2x Detent Springs
✅ Pivot Pin Detent
✅ Take Down Pin Detent

Fire Control Group

✅ Hammer
✅ Hammer Pin
✅ Hammer Spring
✅ Trigger
✅ Trigger Pin
✅ Trigger Spring
✅ Disconnector
✅ Disconnector Spring

Magazine Catch Assembly

✅ Magazine Catch
✅ Magazine Catch Button
✅ Magazine Catch Spring

Pistol Grip Assembly

✅ Pistol Grip
✅ Pistol Grip Screw
✅ Pistol Grip Lock Washer

Selector & Safety Group

✅ Selector
✅ Selector Spring
✅ Safety Detent

Take Down & Pivot Pins

✅ Pivot Pin
✅ Take Down Pin

Trigger Guard Assembly

✅ Trigger Guard
✅ Trigger Guard Roll Pin


Why Choose the A1Armory Lower Parts Kit?

Mil-Spec Compatibility – Works with any standard AR-15 lower
Full 31-Piece Kit – No missing parts, no surprises
DIY & Pro-Friendly – Ideal for beginners and seasoned builders alike
Quality-Controlled – All components inspected for reliability & fit
Enhanced Performance – Smooth trigger pull, solid safety engagement, and dependable mag retention


Pro Tip: Pair this LPK with an A1Armory buffer tube kit and stock assembly for a complete lower build solution.


Built for Builders Who Refuse to Compromise

At A1Armory, we stand behind every part we sell. This AR-15 Lower Parts Kit delivers the precision, durability, and ease of installation that sets serious builds apart. Perfect for your next project, this kit makes assembling your lower receiver fast, simple, and rock-solid reliable.

 

 

 

 

 

 

 

                                                                         

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4 Reviews

  • 4

    Lower parts kit review

    Posted by Joshua Speer on Oct 16th 2025

    The parts kit is amazing, tagged up with an upgraded trigger. Gonna be a fun day at the range

  • 5

    Bought this lower parts kit for my next build....

    Posted by ronnie graves on Feb 25th 2023

    Bought this lower parts kit for my next build. Haven’t decided what caliber I’ll build next but this kit looks like it’s quality and all the parts are there.

  • 5

    Parts...

    Posted by Kevin Gunn on Feb 6th 2023

    AWESOME customer service!!! Had a part missing and it was solved very quickly by a human on the phone!!! Completely satisfied!!!

  • 5

    Decent Lpk, even better...

    Posted by Mark White on Jul 29th 2021

    This LPK seems to be pretty good quality, but to my surprise A1 tossed in some extended take down pins and a receiver plate with ambi sling slots, not that stickers are bad but this little gift is way more useful!

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