Summary

D-30 122 mm Soviet cold war towed howitzer scaled for close to 1-100 deployed. if you want to try for a transport version .3ds file is included.
Please note I have printed with a .25mm nozzle using PLA

http://www.armyrecognition.com/russia_russian_army_light_heavy_weapons_uk/d-30_122_mm_towed_howitzer_technical_data_sheet_specifications_information_pictures_video.html

Print Settings

Printer Brand:

LulzBot

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Mini</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>Doesn't Matter</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>.10</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>15%</p></div></p>                                                        <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>best to print with a .25mm nozzle with PLA</p></div>

Post-Printing

See web page listed in the summary for orientation of base and gun tube.
Assemble with your favorite method,
CA glue, ferret spit or bubblegum your choice.
Have fun

D-30 Soviet cold war towed 122mm howitzer