AR-15 Front Sight Bench Block

Kudos to NutsBrett and isnotayhoo for their work to bring this into being.

I made slight modifications;

1. added a support to the top of the FSB to hold the sight parallel to the block.
2. added a support for the bayonet lug to help prevent rolling of the FSB when driving the pins. This will not help if your lug is removed.
3. removed the "wings" from the ends as this prevents the handguard end cap from being able to be placed flush against bench block.
4. removed the "mirror" design and it now prints as one continuous piece.
5. taper pin holes slightly reduced in diameter/moved.