Alg Defense Ar-15 Lower Parts Kit W/ Qms Trigger
$93.00
The ALG Defense AR-15 Lower Parts Kit with QMS Trigger is a complete, ready-to-assemble solution for builders finishing an AR lower receiver. Whether you're assembling your first rifle or your tenth, this kit consolidates the small parts that are easy to lose and tedious to source individually—giving you everything you need for a functioning, reliable lower in one box.
The standout component here is ALG's QMS (Quick Modular System) trigger, designed for shooters who want a crisp, predictable pull without the premium price tag of match-grade options. Paired with a full complement of springs, detents, pins, and controls, this kit eliminates the guesswork of part compatibility. All the safety lever, mag release, bolt catch, and takedown hardware is included—you just need the lower receiver and your preferred grip (offered separately if you want to choose your own).
This is the kind of kit that appeals to AR builders who value simplicity and value. You get quality ALG engineering on the trigger and thoughtful design throughout, without paying for premium materials or features you won't use. It's equally at home on a range gun, a hunting rifle, or a defensive carbine.
Key Features
- QMS Trigger included for smooth, reliable function
- Complete lower parts kit—bolt catch, safety, mag release, all springs and detents
- All hardware needed for a functional lower assembly
- Available with or without grip for flexibility
- Quality ALG Defense engineering at a straightforward value
Specifications
| Brand | ALG Defense |
| Product Type | AR-15 Lower Parts Kit |
| Trigger Type | QMS (Quick Modular System) |
| Included Components | Bolt catch assembly, mag release assembly, safety lever, trigger guard, all springs and detents, takedown pins and hardware, QMS trigger |
| Grip Included | Available with or without |
| Compatibility | AR-15 lower receivers |
Frequently Asked Questions
What's included in this lower parts kit?
Everything except the lower receiver itself: bolt catch assembly, mag release, safety lever, trigger guard, buffer retainer, all springs and detents, takedown pins, and the QMS trigger. You can choose whether or not to add a grip.
Will this fit my AR-15 lower receiver?
Yes, this kit is designed for standard AR-15 lower receivers. All parts are compatible with mil-spec dimensions.
Can I buy this kit without a grip?
Yes, the kit is available with or without a grip, so you can pair it with your preferred aftermarket or OEM grip.
What is the QMS trigger?
The QMS (Quick Modular System) is ALG Defense's trigger design, engineered for reliable performance and a clean break without the cost of premium match-grade options.
