Nerf Stryfe Half Length Kit

This is an update of my [old half length adapter](https://www.thingiverse.com/thing:3731742), with over-insertion stoppage. As with before, shell cutting is likely necessary to get a clean fit.

I have also modeled a new half length adapter from scratch that isn't fully forward, but is farther forward than most other adapters. This adapter has a very snug fit into the blaster, but a great fit with the Talon mags themselves. No over-insertion issues, mags drop freely. The flaring is insufficient for serious play, but significantly better than many other half length adapters and works perfectly fine in non-competitive gameplay.

Hardware required:
Fully forward adapter uses 4-40 x 3/8" countersink screw, used on the Caliburn/Talon Claw platform. Both screws should be used.
The newer flared half length adapter uses 1/16" x 3/4" roll pins from the Caliburn/Talon Claw platform. While 2 slots are provided, I only use one of them. Roll pins cost less, and I may update the fully forward adapte