i know alot of people i read have feeding or extraction issues etc on the 7.5" models. how do your pistols hold up?
Now that the pistol buffer tubes use the CAR buffer & spring, they are much more reliable. They have a tendency to be ammunition sensitive, and may have to play with different buffers to help compensate, and the extractor O-ring helps with extraction issues. Chrome lined barrels tend to be more reliable than the non-chromed ones, as the chrome chamber gives a slick surface that reduces the amount of effort required for extraction, which reduces short stroking which generally leads to the feeding issues.
Now that I've went all around the question without really giving an answer, I'll get to the answer
. 7.5" pistols are still more of a novelty weapon rather than a SHTF weapon. They are loud, obnoxious (especially if you add a good brake on the end), a bit unwieldy, and gain HUGE attention at the range, both with the flash and the concussion that it emits. I have a few of them, both in pistol versions & SBR versions and I bring them out for fun or when someone brags about their Desert Ego or S&W 500 and puts down my "toy" guns. It tends to give them a new appreciation of the black rifle. If you are looking for a good attention getter or like ginormous flame balls coming from the front of your gun, a 7.5" pistol is the gun for you.
You will need to be patient during the break in process and might have to pay attention to the ammo that you use, but once figured out, they can be a ton of fun.
Hope that this answered your question, if not let me know.