B&T Magazine Adapter Lower w/Complete Trigger Group APC9 Pro/GHM9  Sig P320 For Sale

B&T Magazine Adapter Lower w/Complete Trigger Group APC9 Pro/GHM9 Sig P320 For Sale. B&T P320 magazine compatible lower receiver/trigger housing for the B&T PRO APC9, APC9K and GHM9. Attaches to your APC9/GHM9 upper receiver to accept SIG P320 9mm magazines. Includes fire control group.
Fits: B&T PRO APC9/APC9K/GHM9
Uses SIG SAUER P320/M17 magazines

The B&T Magazine Adapter Lower with Complete Trigger Group for APC9 Pro and GHM9 platforms is a modular lower receiver designed to allow compatibility with SIG Sauer P320 magazines. This conversion option gives owners of compatible B&T pistol-caliber platforms the ability to use a widely available pistol magazine system while maintaining the reliability and ergonomics of the B&T design.

Designed for APC9 Pro and GHM9 Platforms

B&T engineered its APC Pro and GHM9 families around a modular architecture, allowing users to swap lower receiver configurations to support different magazine types. The SIG P320 magazine lower provides an alternative to standard B&T or Glock magazine configurations, offering greater flexibility for users who already operate SIG P320-compatible equipment.

Complete Trigger Group Included

This lower assembly comes equipped with a complete trigger group, providing a ready-to-install solution rather than requiring separate trigger components. The integrated design maintains the familiar B&T controls, durability standards, and compatibility expected from the APC9 Pro and GHM9 platforms.

Key Features

• Compatible with B&T APC9 Pro and GHM9 platforms
• Accepts SIG Sauer P320 magazines
• Complete lower receiver assembly with trigger group
• Modular design for platform customization
• Maintains B&T ergonomic controls and handling characteristics
• Ideal upgrade for users seeking SIG magazine compatibility

SIG P320 Magazine Compatibility Considerations

B&T has evaluated compatibility between APC9 Pro SIG P320 lowers and different generations of P320 magazines. Magazine design variations can affect bolt hold-open performance, and B&T recommends using properly compatible magazines to achieve the best reliability.

Why Choose the B&T SIG P320 Lower?

For shooters who already use SIG P320 magazines, this adapter lower offers a practical way to unify magazine platforms while keeping the compact, modular design of the APC9 Pro and GHM9. It provides an efficient upgrade path for users who value flexibility, familiar magazines, and B&T engineering quality.