This sounds like a very challenging diorama.. The terrain and the deep snow etc will be a challenge. Yes contrary to some of the posts here it was a rather bloody affair.
The LZ was racked with gunfire from an AC130 and F-15s before dawn and several Taliban were dead as well as Neil Roberts and several Rangers and PJs were also killed or wounded and there was plenty of blood . If you read the Books you would know Razor 01 was hulked out and was a rather bloody mess literally.
The book "Roberts Ridge" it's the only true story of what happened there on that Day.. The book Not a good Day to Die is another good reference about the event but that author was not given interviews by the DevGru SEALS that were involved and the story has more Army censored BS than facts. Veterans of that battle have told me "Roberts Ridge" is spot on. It was a bloody LZ . Maybe not the area in close proximity of Razor 03 but the ridge top and bunker areas were strewn with dead and pieces of dead bad guys.
Unless you plan on doing almost headless SpecOps guys and bits and pieces of Taliban dudes in the bloodstained snow and a few severly chewed up Chinooks I think a static model of Razor 01, 02, or 03 with a Trident, a Ranger pin, and AF PJ pin on a realistic base with a 160th SOAR Patch would look just great and serve the purpose of Honoring these Men just fine. That's what I did anyway. I have had the Honor of knowing Petty Officer Neil "FiFi" Roberts and 4 of his shipmates that were involved.
So I think your idea to do this is a great idea. The realistic part is wholely up to you but like someone on this tread said it could be a very sensative issue to some.
I don't know how anyone who reads Roberts Ridge could come away from that book thinking that was not a Bloody firefight.. It was a Hornets nest and a near run thing for those who were there. That book was also a fine way to Honor those who fought there .
Many more books will be written about the first years operations in Afganistan now that the censors have lightened up and the Veterans get out and are free to tell their storys not what the press was writing for sure..
Be Well/DBF
Walt