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Magpul® MOE® AR-15 Lower Build Kit

Usually ships the same day or the next business day!

We don't want to say this is the kit to end all kits, because that would be too cliché. So we'll just tell you this is the kit to end the lower half of your AR build. If you got your hands on a stripped lower and you're ready to build, this kit will finish off the bottom half of your AR. It's got what you need to turn that lower into a finished assembly. We added some mil-spec parts, but we also threw in some upgraded Magpul® parts too! 

Use our picture guide for assembling your lower parts kit

Mil-Spec AR15 Lower Parts Kit (w/ Hammer and Trigger)

The Classic Lower Parts Kit is essential for finishing your lower. To have multiple build kits, or lower receivers to swap out on your AR-15 rifle, it's crucial to have multiple lower parts kits. Sure there are no fancy color coded bags, but rest assured this lower parts kit offers all the same parts needed to finish your lower. 

This Classic Lower Parts Kit comes complete with:

  • 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

Mil-spec AR-15 Buffer Tube Assembly

The AR-15 Mil-Spec Buffer Tube Assembly is made out of durable 6061-T aluminum, making this product very lightweight. The 3-ounce buffer and carbine coated spring ensure a smooth and reliable operation. The mil-spec six position receiver extension allows this kit to be compatible with various aftermarket stocks for simple customization. This kit includes the following: end plate, castle nut, buffer tube, carbine spring, and 3-ounce buffer.

Additional Features: 

  • Mil-spec dimensions
  • Six-position buffer tube for maximum adjustability of butt stock length
  • Accepts all standard-sized AR type butt stocks

Magpul® MOE® Mil-Spec Carbine Stock

There's a reason Magpul® is so great at what they do. Their parts are super rugged, they're as tough if not tougher than mil-spec stuff, and they usually weigh less too. The Magpul® MOE® Mil-Spec Carbine Stock is no different. It's light, it's tough, and it's smart in its design. Its configuration makes the length adjustment latch both fast and shielded from being accidentally accuated or snagged. See below for all its awesome features.


  • Mounts on mil-spec carbine receiver extension tube
  • Lock spring provides positive locking and long service life
  • Sloping cheek weld combines a slim profile with user comfort
  • Side mounts accept optional cheek risers for higher cheek weld
  • Shielded release latch prevents snagging and accidental operation
  • Removable 0.30" rubber pad offers anti-slip surface and increases impact protection
  • Compatible with Magpul® ASAP®, ASAP® QD, and other receiver-mount sling attachments.

Magpul® MOE® AR15/M4 Grip

Look, the AR-15 for how modular it is and how it can adapt to any situation, falls short in one key area: the grip is bad. There's no such thing as holding it right and being comfortable at the same time. The angle is horrible. The way an AR's OEM grip was angled was bad for soldiers' wrists, and it eventually forced them to start holding it incorrectly just to squeeze as much comfort as they could out of it. But that was the past.

Here in the present, Magpul® destroys the issue with their MOE® AR15/M4 Grip. First, it rids you of the biggest issue of the G.I. mil-spec grip by having a noticeably steeper grip angle. No more contorting your wrist to get that high grip purchase. Also, Magpul® put some more thickness into the MOE® grip than the mil-spec grip. You'll instantly notice the difference. And just as an added icing on the cake, they've turned the inside into a compartment to store gun oil or batteries, or whatever else.


  • Anti-slip grip texture
  • internal storage compartment
  • MUCH better grip angle than mil-spec grips
  • Thicker diameter for meatier grip
  • Mounting hardward included

And oh yeah, they're made in the U.S.A

Magpul® MOE® Enhanced AR15/M4 Polymer Trigger Guard

Stop installing that boring mil-spec trigger guard on every AR you build. The Magpul® MOE® Enhanced AR15/M4 Polymer Trigger Guard is miles ahead of the mil-spec stuff. Why? For starters, it's extremely ergonomic and gives your trigger finger a lot more room which is great if you're wearing gloves. Second, it's made from a super strong polymer, that's just as tough if not tougher than that mil-spec one. Oh, and installation is simple and doesn't require any punches or specialized tools, so you know you won't mar or mess up your lower when you install it. All you need is a hex wrench. See below for more features.


  • Easily installed without specialized tools
  • Ergonomic, enlarged design to accommodate use with gloves
  • Fills the annoying "gap" at the rear of the standard trigger guard
  • Works with most .308 AR lowers, but custom fitting may be required

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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. only ships within the United States. Federal legislation dictates we cannot ship our products internationally.


We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.