Ranger Adaptable Rifle

This piece has been a huge time eater for what it is, but the result is just what I need. Further evolution of the rifle many of my Rangers carry to battle.

The rifle is in bullpup layout. Parts are modular and interchangeable, allowing for varying calibers and barrel lengths while cutting supply costs and logistics.
Full ambidextrous controls and forward case ejection are standard features.
This particular setup has a 14.5in barrel and a caliber comparably sized to but more advanced than 338 lapua.

Would many of you appreciate a variants set of this?