Receiver PartsAlg DefenseSold by Brownells

Alg Defense

Ar-15 Lower Parts Kit W/ Qms Trigger - Ar-15 Lower Parts Kit With Grip W/ Qms Trigger

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Complete Lower

QMS trigger included

Includes Bolt

Catch, magazine release, safety, and

Comes Trigger

Trigger guard, takedown pins, detents,

Available Without

Or without the grip

Manufactured Alg

Defense

$96.00
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SKU: 100042562

Overview

This complete lower parts kit is intended for building or refreshing an AR-15 lower with the core components needed for assembly, including a QMS trigger and the small parts that support controls, detents, and pins. It is suited to hunters and shooters who want a straightforward parts package for a rifle setup without piecing together each item separately. The kit is offered with or without a grip, giving some flexibility depending on the build. Made by ALG Defense, it provides a practical foundation for a clean, functional lower receiver build.

Why Hunters Choose the Alg Defense

Complete Lower

Parts kit includes the core

Includes Qms

Trigger for a ready-to-build lower

Covers Bolt

Catch, magazine release, safety, and

Includes Trigger

Guard and takedown detent components

Available Without

Or without the grip for

Key Features

  • Complete lower parts kit with QMS trigger included
  • Includes bolt catch, magazine release, safety, and buffer retainer components
  • Comes with trigger guard, takedown pins, detents, and springs
  • Available with or without the grip
  • Manufactured by ALG Defense

Best Used For

  • AR-15 builders needing a complete lower parts kit for a full lower receiver assembly
  • Users wanting a kit that includes a QMS trigger and standard lower components
  • Builders who prefer the option to order the kit with or without a grip
  • Shooters assembling a replacement parts set for an AR-15 lower receiver
  • Owners seeking one package with pins, springs, controls, and trigger components

Specifications

Bolt CatchIncluded
Bolt Catch PlungerIncluded
Bolt Catch Roll PinIncluded
Bolt Catch SpringIncluded
Buffer RetainerIncluded
Buffer Retainer SpringIncluded
Grip IncludedCan be purchased with or without the grip
Kit TypeLower Parts Kit
Mag ReleaseIncluded
Mag Release ButtonIncluded
Mag Release SpringIncluded
SafetyIncluded
Safety DetentIncluded
Safety Detent SpringIncluded
Takedown Detent SpringsIncluded
Takedown DetentsIncluded
Takedown PinsIncluded
TriggerQMS Trigger
Trigger GuardIncluded
Trigger Guard Roll PinIncluded

Pros

  • Complete lower parts kit includes the core AR-15 control and retention components.
  • Includes a QMS trigger for a ready-to-build lower assembly.
  • Covers bolt catch, magazine release, safety, and buffer retainer parts.
  • Includes trigger guard and takedown detent components in one package.
  • Available with or without the grip for build flexibility.
  • Made by ALG Defense, a recognized name in AR-15 components.

Considerations & Trade-offs

  • This is a lower parts kit, so it covers core lower receiver components rather than a complete rifle build; additional parts are still required to finish the platform.
  • The kit is offered with or without the grip, so buyers should confirm which configuration matches their build before ordering.
  • The included QMS trigger is part of the package, but the listing does not provide trigger pull details or other performance specifications.
  • Compatibility details beyond the AR-15 lower parts kit description are not provided here, so fit should be verified against the intended build components.

Suggested Comparisons

  • AR-15 trigger upgrade kits
  • AR-15 lower parts kits
  • AR-15 grip options
  • AR-15 build components

Suggested Accessories

  • AR-15 grip
  • Lower parts kit
  • Trigger guard
  • AR-15 assembly tools

Frequently Asked Questions

What parts are included in this lower parts kit?

The kit includes a bolt catch, bolt catch plunger, bolt catch spring, bolt catch roll pin, mag release, mag release button, mag release spring, buffer retainer spring, safety, buffer retainer, safety detent spring, safety detent, trigger guard, trigger guard roll pin, takedown detent springs, takedown detents, takedown pins, and a QMS trigger.

Does this kit come with a grip?

The product description says you can get the kit with or without the grip. The exact configuration for the item shown is not specified in the provided data.

Is this a complete lower parts kit for an AR-15 build?

Yes. The product is described as a complete lower parts kit with a QMS trigger.

Who makes this kit?

The manufacturer listed in the product data is ALG Defense.

Does the product data specify trigger details beyond the QMS trigger name?

No. The provided data identifies it as a QMS trigger, but does not give additional specifications about the trigger.