I've been saying to anyone who would listen that I was waiting for a G4 G30s before replacing my G4 G30. Since there has been no indication of Glock bringing out this variant soon, I jumped on a new/unfired G36 slide/barrel assembly when I saw one for sale.
The G36 slide fit easily on the G4 G30 frame:
I had read there would be a considerable gap where the slide met the G4 dust cover but I don't find this objectionable at all:
Once I got to the range it functioned like it was made for the 30 frame, firing 130 rounds of three different loadings. I have read that the G30 and to a greater extent the G36 will not feed SWC ammunition and occasionally they will choke on truncated cone bullet shapes. Please don't tell my cobbled together G30S about that as 40 rounds fired were reloads topped by the H&G #68 SWC and 30 rounds were the Hornady 200g XTP, a truncated cone design. The rest were reloads using Barry's RS plated 200g. And before you object, I thoroughly cleaned the barrel after firing the lead alloy bullets before shooting the jacketed rounds.
I'm also quite pleased with the Amerigjo lime green CAP Sight set I installed:
They sure make it easy for these over the hill eyes to pick up the sights, even going as fast as my arthritic hands and shoulders can manage (LOL).
I'm very glad I didn't wait for Glock to bring out the G4 G30S. Who knows how long it will take them and I get to enjoy/carry this gun starting right now.
Dave