Geissele Standard Lower Parts Kit (No Trigger) – AR-15 Mil-Spec LPK

Upgrade or complete your AR-15 lower with the Geissele Automatics Standard Lower Parts Kit — a high-quality, mil-spec solution designed for reliability, durability, and consistent performance.

This kit includes 18 essential lower receiver components (excluding the fire control group), making it the perfect choice for builders who want to run a custom trigger setup while still using trusted Geissele internals.

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🔧 What’s Included

• 18-piece mil-spec lower parts kit
• Improved safety detent for smoother engagement
• Geissele Posi-Snap safety system for crisp, positive feedback
• All required components to complete or rebuild your lower (minus trigger group)

💡 Why Choose the Geissele Lower Parts Kit?

Unlike standard LPKs, Geissele brings enhanced feel and reliability to key components that are often overlooked.

✔️ Posi-Snap Safety Feel

Geissele’s Posi-Snap safety delivers a noticeably more positive and tactile engagement compared to standard mil-spec selectors — no mushy or vague positions.

✔️ Improved Detent Design

The upgraded safety detent ensures smoother operation and more consistent engagement over time.

✔️ Perfect for Custom Builds

This kit does NOT include a fire control group, making it ideal for:

• Running a Geissele trigger
• Installing a Super Safety system
• Any custom AR-15 trigger setup

🔥 Ideal Use Cases

• AR-15 lower receiver builds
• Lower receiver rebuilds / refreshes
• Pairing with upgraded triggers (SSA-E, SSA, etc.)
• Super Safety-compatible setups

📦 Product Specifications

• Manufacturer: Geissele Automatics
• Part Number: 05-343
• UPC: 817953025277
• Platform: AR-15
• Includes Trigger Group: ❌ No
• Grip Included: ❌ No
• Total Components: 18

⚠️ Important Notes

• This kit does not include a trigger or hammer
• Designed for mil-spec AR-15 lowers
• Ideal for users running aftermarket fire control groups