GDI-3D
GDI-3D UMP45 GDI Lower Kit
Fully assembled UMP45 lower kit with a lever trip bar and installed active-reset device.
Quick Specs
- Price
- $700
- Weight
- N/A
- Brand
- GDI-3D
- Category
- lower-receiver
Features
- •UMP45 lower
- •Lever trip bar included
- •Installed active-reset device
- •3-position lever selector option
- •USC45 stock-block kit option
Compatibility Tags
Overview
The GDI-3D UMP45 Lower Kit is a fully assembled active-reset lower sold for UMP45-pattern builds and USC45 conversions. The standard package includes the UMP45 lower, a lever trip bar, and an installed active-reset device. GDI-3D lists a three-position lever selector and clone selections for Defgunz9/S5 Tactical, Omega Gideon Shadow, Tommy Built, and HK USC45.
USC45 owners can add GDI-3D's stock-block kit. That option includes a stock block with an installed buffer, stock-block axle pin, stock installation hardware, and a double-stack magazine cut jig. The lower is also listed as compatible with factory backing plates and HDPS/HKP stock blocks.
GDI-3D states that the assembled lower has been tested with factory HK UMP magazines and does not guarantee aftermarket-magazine function. The product page does not list UMP9 or UMP40 fitment, so this catalog entry remains scoped to the maker's documented UMP45 and USC45 path.
Key Features
- Fully assembled UMP45 lower
- Lever trip bar included
- Installed active-reset device
- Three-position lever selector option
- USC45 stock-block conversion option
- Compatible with factory backing plates and HDPS/HKP stock blocks
- Tested with factory HK UMP magazines
Pros
- +Ships fully assembled with the lever trip bar and active-reset device installed
- +Separate clone selections reduce ambiguity when ordering
- +Optional USC45 stock-block package consolidates the conversion hardware
Cons
- −GDI-3D does not guarantee function with aftermarket magazines
- −Product page does not list UMP9 or UMP40 compatibility
- −Listed lead time is 6 to 8 weeks
Detailed Specifications
- compatibility
- UMP45-pattern builds; listed clone options are Defgunz9/S5 Tactical, Omega Gideon Shadow, Tommy Built, and HK USC45
- included
- UMP45 lower, lever trip bar, installed active-reset device
- selectorOption
- 3-position lever selector
- usc45Option
- Stock block with installed buffer, axle pin, stock hardware, and double-stack magazine cut jig
- magazineTesting
- Factory HK UMP magazines
- backingPlateCompatibility
- Factory backing plates and HDPS/HKP stock blocks
- leadTime
- 6-8 weeks
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Build Your Custom Configuration
Add the GDI-3D UMP45 GDI Lower Kit to your build and see how it enhances your platform.