I don't know. I've never fired a nailgun in my life.
All I know is that it takes "21 degree round head nails". I'll ask one of our contractors. We have several among our volunteer members. One of them had several Paslode guns.
In my job with this organization, I am frequently called on to repair tools and equipment I've never seen or used. Chinese staple guns, Miller migs, a '67 John Deere tractor, various band, table, and circular saws, and -numerous- extension cords that people place -over- the rails, instead of under them... 🙂 It's actually a lot of fun.
On this particular subject, I found out the Dewalt gun -can- be converted, from a D51825, to a D51850, but, as was pointed out earlier, it might not be cost effective. I'm waiting on some comprehensive parts diagrams, with actual part numbers, instead of "item numbers", with which to make a side-by-side comparison. Most of the gun parts -seem- the same, showing only minor differences in the nail magazine.
On a tangent subject, does anyone know the difference between a D51850 gun, and a DWF83PL gun? Both seem to use the same nails, and be similar in size, so I was wondering if one series is a "newer" model, or they have different characteristics of which I'm unaware.