The B&T APC9 Lower/Trigger Group (brand part no. BT-361836) is the alloy MP5-pattern lower and trigger-group assembly for the B&T APC9 platform. Unlike most AR-pattern rifles, the APC9 design places the ATF-regulated, serialized component in the upper receiver rather than the lower, so this trigger-group assembly is a non-serialized accessory rather than a firearm. It gives APC9 owners a genuine factory replacement or spare lower/trigger group without the wait or paperwork a serialized part would require.

Key Specifications

• Built as the lower/trigger-group assembly for the B&T APC9 platform.
• Machined from aluminum alloy.
• Follows an MP5-pattern lower/trigger-group interface.
• On the APC9 platform, the upper receiver, not this lower, carries the serial number.
• Ships as a non-serialized component, since B&T serializes the APC9’s upper.

Frequently Asked Questions

Does this require an FFL transfer? No, on the B&T APC9 platform the upper receiver is the ATF-serialized component, not this lower/trigger-group assembly, so it ships as an ordinary accessory.

What platform is this compatible with? The B&T APC9, using an MP5-pattern lower/trigger-group interface.

Buy the B&T APC9 MP5-Pattern Lower/Trigger Group

Get a genuine alloy lower/trigger group for your APC9 build. Order it from our B&T lineup, part of our rifle lowers selection, at our Lubbock, Texas gun shop as soon as it’s ready to ship.