Prop/replica AR-15 fidget toy system | Working bolt catch (rubberbands!)

Want to do cool reloading AR drills but there's no simple AR model that does the job? Shut up and listen ; this model features :

1. A WORKING BOLT CARRIER GROUP ( all you need is 1x RUBBERBAND) 
2. Magazine catch (this require a spring but it's calm)
3. BOLT CATCH (Doesn't require a spring but good to have)
4. Safety selector
5. milspec stuff in general

You can add your own attachments, remixes (please oh god) to make this concept better, I just want to show that you don't need alot of fancy proprietary hardware to make an AR prop

Hardware needed :
2x Keyboard switch springs (MX switch) : For magazine catch, optional for bolt catch
1x Rubberband : For the BCG
1x super glue : For non moving parts that you just want to glue

1x Filament : for dustcover and bolt catch pins

NOTE: Do adjust the scaling of moving parts ( the bolt, and charging handle etc) carefully to about 99-98% depending on your printer's tolerance

Instructions and video will be added shortly when i finally have the god damn time to do so, meanwhile consult the pictures
 

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Things to work on (would appreciate if someone could help out with remixing!) :

1. Proper handguard to receiver attaching
   The current method of attaching is via 2.5mm/3mm screw and a small printed peg. Obviously this isn't the best method as it requires a screw and longer handguards would be a problem.
2. Better dustcover
   Current dustcover is attached with a PLA filament pin and is friction fitted (yeah surprisingly it works on my end), shouldn't be too hard to make a better one on my end.
3. Trigger 

There isn't trigger not because I forgot to add it, it's to show that this is a prop that does not fire anything.