FGC Barrel Retainer Vanguard compatible RAILS HANDSTOP remix

added some rails and the handstop from Untangles design into this one. Printing now. Not sure of functionality but it should work.

*EDIT: 2/5/2021:
Added a file for the extended barrel retainer but for a Vanguard Pistol Barrel. It is the file with "Pistol" in the name

*EDIT: 2/6/2021:
Printed both out, the hole is super duper tight.....and yes, thats what she said..... May need to be edited....I kind of like the snug fit, but I cant get it through the hole......may have to sand it....

*EDIT: 2/7/2021:
Very very tight. I will not edit it to be bigger because it could just be my printer.....But I had to do a lot of sanding to get it mostly through. Then I used a rubber mallet to get it all the way in because it was stuck. Its in there snug but Im gonna have to melt the plastic off in order to get the barrel back out of the retainer. Just something to think about. you may need to edit the file. But I did get the barrel in and it is very very snug.