So for context:
I bought my first 1301 in 2016 about April. I added the Aridus adapter about 1.5 years later. In that time the gun has been through all of my classes (usually used as a loaner) and some other classes I've taken from others. That is in addition to my own personal practice which, until the ammo crunch, was fairly constant. Just in my own practice time I've fired just over 4,000 shells through this gun...not counting what it's seen as a loaner.
I talked with knowledgeable folks about the lack of the factory buffer when the Aridus adapter was gaining in popularity and I was assured it wouldn't be a cause for concern.
My use has born that out:
Attachment 78466Attachment 78467Attachment 78468
The receiver itself has finish wear, as you can see, but no real damage. Keep in mind that the buffer back there is not the primary device for decelerating the bolt....the recoil spring and the action of cocking the hammer are what accomplish that. The gun isn't beating itself to death without the buffer present.
The bolt shows a little finish wear on the rear face, but as you can see it's no more than is visible from the rails that run inside the recesses cut into the receiver.
I have no worries anything is going to break.
While I'm at it, somewhere earlier front sights got mentioned so here's a close up of the Blitzkrieg front sight for the Benelli M4 installed on my 1301:
Attachment 78469
While it's possible Blitzkrieg has changed the dimensions of their sight since I bought mine some years ago, as you can see it's not sitting way above the protective ears on my gun. I can tell you with absolute certainty that the front sight tower used on the Benelli M4 is the exact same
LPA front sight used on the 1301 Tactical...and that comes from having compared specimens in person and having actually asked that at the factory when I was getting my armorer certification.