To my knowledge distinguished service crosses are named and named Navy Crosses are considered extremely rare because it is not common but I could be wrong.

When did they name Navy Crosses?

Your grandfather had quite the collection!

The trigger group is milled and not stamped so it’s clear it’s not original to the rifle. I’m thinking that it was made by Winchester. IBM M 1 Carbines had a stamped trigger group. It’s not surprising to find that in an arsenal rebuild. They don’t call them mix masters for nothing.  

> I'd readily say he deserved his CIB, honorary or otherwise - and thought so in 2010 as well.

From what I was able to find it looks like he was with the the 15th cav and not the 113th.   https://aad.archives.gov/aad/record-detail.jsp?dt=893&mtch=1&cat=WR26&tf=F&q=39085805&bc=sl&rpp=10&pg=1&rid=7605238    

General MacArthur saw a lot of ground combat during WW1.   7 Silver Stars, 2 Purple Hearts..    https://www.militarymedals.com/warhero/general-douglas-macarthur/

Very likely. Uncommon name.    Wade

So about 6 years back I got a money sink of a radio (I cobbled it together from a demilled Radio face and a Chassis of a 77A), and it turns on, squelch cuts out, my radio scanner picks up it trying to TX, but no audio comes out. Nor can I hear myself in the handset when I key up, it also does not receive from when I tested it with a working PRC-77 at an event. I don't have a God box or anything sadly so that put a wrench in things. My GRM-55 only helps so much.

Hey I'm Josh, been collecting since I was 14 give or take (26 Now), got a pretty decent collection going and I currently am trying to repair a Prc-77/77A so, anyone who can help with that would be amazing. Currently I'm working on Green beret and 1998 force recon kits and a few 80's impressions.