yeah lots of places sell those little roll pin install tools that are basically just clevis pins. they definitely make things easier. although i've taken to just using a small hobby vise with rubber pads on the jaws to drive pins these days, once you get a few blocks to clamp on things just right it's the absolute way to go.
i've taken to using this hobby vice from the vaunted harbor freight for a surprising amount of things. one of them is working on ar/ak triggers and whatnot. no need to use my 6'' bench vise for something that only needs a few pounds of clamping force. unless you are torqueing barrel nuts or something, a hobby vice works great and i work inside in my ac instead of my hot garage lol.
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if you shape a few pieces of scrap in certain ways, you can make clamp blocks to drive every roll pin in an ar upper or lower. even those dang gas tube/gas block pins which ALWAYS seem to be the trickiest and most willing to mushroom on ya.
to fix up.
