The SL-15 V4.8.A

about

This is the SL-15 V4.8.A by Hoffman Tactical.

The SL-15 is a 3D printable AR-15 lower receiver capable of being used in the same capacity as a factory made aluminum receiver. A low cost FDM 3D printer, basic assembly and computer skills, and the factory lower parts are all that is required to complete the lower. A factory AR-15 upper is required to complete the rifle. The goal of this development was not to provide a complete firearm, but instead to provide the regulated receiver in areas where the other parts are easy to obtain. For those who may have printed earlier lowers, V4.8 has several major design changes. The normal overhang design rules were departed from in the grip and trigger guard area for the sake of better ergonomics, this results in additional precautions while printing the lower that will be covered in more detail in the printing section. It should be noted that in areas where ergonomics were not a concern the overhang design has been further improved, such as the buffer threads. Built in supports have not been included in V4.8. In there place support enforcer files have been included to assist with the generation of slicer generated supports. The decision to not include built in supports was made due to the excellent organic and tree supports now available in slicers. With the aid of the support enforcers and the settings in this guide, the process of generating support material is almost as easy as using the built in supports. Rather than separating the developer files into another release, they have been included in this download along with the more commonly used vector files. Both STEP and SolidWorks Part files have been included.

files

File Extension
SL-15 V4.8.A.zip zip

versions

Version: 1.0.0 latest

initial upload

about

This is the SL-15 V4.8.A by Hoffman Tactical.

The SL-15 is a 3D printable AR-15 lower receiver capable of being used in the same capacity as a factory made aluminum receiver. A low cost FDM 3D printer, basic assembly and computer skills, and the factory lower parts are all that is required to complete the lower. A factory AR-15 upper is required to complete the rifle. The goal of this development was not to provide a complete firearm, but instead to provide the regulated receiver in areas where the other parts are easy to obtain. For those who may have printed earlier lowers, V4.8 has several major design changes. The normal overhang design rules were departed from in the grip and trigger guard area for the sake of better ergonomics, this results in additional precautions while printing the lower that will be covered in more detail in the printing section. It should be noted that in areas where ergonomics were not a concern the overhang design has been further improved, such as the buffer threads. Built in supports have not been included in V4.8. In there place support enforcer files have been included to assist with the generation of slicer generated supports. The decision to not include built in supports was made due to the excellent organic and tree supports now available in slicers. With the aid of the support enforcers and the settings in this guide, the process of generating support material is almost as easy as using the built in supports. Rather than separating the developer files into another release, they have been included in this download along with the more commonly used vector files. Both STEP and SolidWorks Part files have been included.

Download

Metrics

Views

1.5K

Downloads

90

Project Info

release date

Dec 10, 2023

artifact type

Printable project

library category

Printable Firearms

fabrication method

Printable Lower / Frame

fabrication tool

3D Printer

release country

United States

language

English

license

No license

Firearm Info

type

Rifle

platform

AR-15

caliber

.223 / 5.56x45

part

Lower Receiver

files

File Extension
SL-15 V4.8.A.zip zip

versions

Version: 1.0.0 latest

initial upload

The files shown on this site are only available to U.S. Persons, as defined at 22 C.F.R. 120.15. The files are also not available to persons outside the United States or to residents of and persons in the State of New Jersey, with the exception of Federal Firearms Licensees.

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