This is a DPMS AR-15 .22 LR magazine and it is designed to work with DPMS AR-15 conversion kits and Identical in construction type .22 LR conversion systems.
It features a 10 Round capacity.
This is a prototype. If there are any questions, please let me know in the comments.
The dimensions for the magazine are: 141.3 x 22,2 x 64,3 mm
infill for magazine 10%
infill for follower 100%
infill for insert 10%
infill for floorplate 10%