DS1913 - AR-15 Lower optimized for .22 LR and minimal post-processing

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# DS1913
by nguyenkvvn

An AR-15 lower optimized for an Atchission/CMMG .22 LR conversion kit

Public Release v1.0

## Description
The DS1913 is an AR-15 lower, based off the Disruptive Solutions AR-15 lower from FOSSCAD, optimized for an Atchission/CMMG .22 LR conversion kit. Features to it include a 1913 rail on the rear for mounting compact braces or stocks, bolt-catch delete for added reinforcement, and integrated bolt-press-forward to increase reliability. The lower is refined specifically for 3D printing, accounting for shrinkage and tolerances (meaning your printer must be 100% calibrated), along with modifications needed to make the lower functional, as the original was published as untested.

## WARNING!
Do *NOT* under any circumstance use this design with ANY upper receiver that requires a buffer tube. Catastrophic, and FATAL, damage *WILL* occur. The designer, and any affiliated or non-affiliated groups, cannot be held responsible or liable for any injuries or damages that occur with your use of this model.

It is imperative you read this entire document before beginning this project.

## Materials Required
1. **.22 LR AR-15 Upper Receiver** - CMNG/PSA .22LR Dedicated Receiver, or CMNG .22LR Conversion Kit.
2. **AR-15 Lower Parts Kit** - A lower parts kit of your choosing will do. Mil-spec is the minimum.
3. **AR-15 Fire Control Group** - You will need a _mil-spec_ AR-15 fire control group.
4. **AR-15 Grip** - You will need the grip screw, and a pistol grip of your choosing.

## Instructions
1. Print the receiver, with the _INSIDES FACE DOWN_.
2. Assemble the lower receiver.

## Printing Tips
* eSUN PLA+ is the _required_ filament.
* Print HOT and SLOW for maximum bonding and strength. (50 mm/s and 230 C is recommended.)
* It is strongly recommended that your x-axis, y-axis, and z-axis stepper motors are calibrated 100%.

## Changelog
* Public Release Beta v1.0
> - Initial release

## License
> MIT License

files

File Extension
DS1913-master.zip zip

versions

Version: 1.0.0 latest

Initial Release

about

# DS1913
by nguyenkvvn

An AR-15 lower optimized for an Atchission/CMMG .22 LR conversion kit

Public Release v1.0

## Description
The DS1913 is an AR-15 lower, based off the Disruptive Solutions AR-15 lower from FOSSCAD, optimized for an Atchission/CMMG .22 LR conversion kit. Features to it include a 1913 rail on the rear for mounting compact braces or stocks, bolt-catch delete for added reinforcement, and integrated bolt-press-forward to increase reliability. The lower is refined specifically for 3D printing, accounting for shrinkage and tolerances (meaning your printer must be 100% calibrated), along with modifications needed to make the lower functional, as the original was published as untested.

## WARNING!
Do *NOT* under any circumstance use this design with ANY upper receiver that requires a buffer tube. Catastrophic, and FATAL, damage *WILL* occur. The designer, and any affiliated or non-affiliated groups, cannot be held responsible or liable for any injuries or damages that occur with your use of this model.

It is imperative you read this entire document before beginning this project.

## Materials Required
1. **.22 LR AR-15 Upper Receiver** - CMNG/PSA .22LR Dedicated Receiver, or CMNG .22LR Conversion Kit.
2. **AR-15 Lower Parts Kit** - A lower parts kit of your choosing will do. Mil-spec is the minimum.
3. **AR-15 Fire Control Group** - You will need a _mil-spec_ AR-15 fire control group.
4. **AR-15 Grip** - You will need the grip screw, and a pistol grip of your choosing.

## Instructions
1. Print the receiver, with the _INSIDES FACE DOWN_.
2. Assemble the lower receiver.

## Printing Tips
* eSUN PLA+ is the _required_ filament.
* Print HOT and SLOW for maximum bonding and strength. (50 mm/s and 230 C is recommended.)
* It is strongly recommended that your x-axis, y-axis, and z-axis stepper motors are calibrated 100%.

## Changelog
* Public Release Beta v1.0
> - Initial release

## License
> MIT License

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creator

organization

Metrics

Views

28K

Downloads

1.2K

Project Info

release date

Oct 12, 2020

artifact type

Printable project

library category

Printable Firearms

fabrication method

Primarily Printable

fabrication tool

3D Printer

release country

United States

language

English

license

MIT License

Firearm Info

type

Rifle

platform

AR-22

caliber

.22LR

part

Lower Receiver

version hash

QmZSVR8BCfWEF4fgL8QmqCige5i2hSvW9hQZ8LEdgbLkoi

files

File Extension
DS1913-master.zip zip

versions

Version: 1.0.0 latest

Initial Release

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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