R20a1

thingiverse

Proof AR-15 Magazine R20a1 -Proof10010 remix: https://www.thingiverse.com/thing:3367355 *****Advisory***** Fabricate this magazine at your own risk. The publisher of this package is not responsible for any damages to equipment during or after the fabrication or use of this magazine. Publisher is not responsible for any legal violation committed by the fabrication or use of this magazine. *****SUMMARY***** This package contains the STL files for a 20 round box magazine. The Magazine is design to function under a wide array of filament material including standard PLA. The following material will serve as a guide to successfully creating a functional magazine. This magazine is an enhanced variant of the 20 round magazine created by BarCamel of Thingiverse. Mag body comes in two variants: with a divider and with out a divider. Enhancement variant was completed by proof10010. *****Files***** In the package, one will find three STL files. These files will include Floor Plate, Follower, and Magazine Body. *****Slicer***** Ultimaker Cura 4.6 was used during development and is advised for use in the fabrication. *****Printer***** The Creality Ender 3 pro was used in the development process and is the recommended. *****Filament***** Duramic PLA+ was used during development and evaluation. Evaluation included reliability in weapon cycling and long term survivabilty when loaded. Magazine is found to be extremaly reliably after light sanding and using steel cased ammunition. Magazine was left loaded for 1 week with approximately 0.1mm of feed lip exspansion. *****Slicer Settings***** Printed with the following settings: Layer Height: 0.16mm Wall Thickness: 1.2mm Wall line Count: 4 Top/Bottom layers: 6 Infill Density: 40% Infill Pattern: Cubic Printing Temperature: 225 C Build plate Temperature: 55 C Print Speed: 50 mm/s Support: Yes Support Placement: Everywhere Support Overhand Angle: 80 Build plate Adhesion: None (Note: These setting are only recommendation and their values may vary from printer to printer.) *****Post Processing***** Post processing mostly consist of sanding and smoothing the follower, especially it's rails . Smooth all side walls that can make contact with the inner wall of the magazine body, but be careful not to remove large amount of material. Test follower by sliding it inside the magazine body. If the follower catches, additional sanding is required. In some instances, it may be necessary to round corners. *****Assembly***** Equip the follower onto a spring and feed the combination into the magazine body. Compress the spring into the magazine body until it is flush with the bottom. Slide the floor plate into the magazine body track and capture the compressed spring. Slide the floor plate until it no longer can. Apply tape around the plate and mag body to secure it in place. *****Trouble Shooting ***** If rounds are getting stuck mid way inside the magazine body, the tips of the bullets are colliding with the front inner face of the magazine body and sanding is required on that face. If rounds are "nose diving" into the top of the magazine body during feeding, Print new follow that is scaled up by 1% in all axis'. If issue is not resolved, sand top of magazine body where the tip of the bullets make contact and ensure clearance (Be extremely conservative with sanding if going the later option). If mag catch is not well defined (loose filament on the top face) take a hot end and gentle press the loose filament into the material underneath. If follower is catch on the mag body, sand all contact surfaces including the front face of the follower where it makes contact with the mag body divider.