Promag, that low price point makes ProMag hard to beat. It’s true they aren’t duty grade magazines, but their price point is well below that of most duty grade magazines. The affordability makes them a great choice for goofing off or for range training magazines
ProMag was the first to produce Saiga drums, and who doesn’t want a crazy 12-gauge drum hanging out of their semi-auto shotgun? The 12 gauge drums were a blast, and so are their Glock drums, and their AK drums, and all the other silly and fun stuff they make. If you have that Franklin Arms 10/22 binary trigger, you gotta get a drum for it to really take advantage of it.
My first positive experience with ProMag was the drop in Colt SMG block for standard mil-spec ARs. I wanted a PCC in AR form years and years ago, and the options were slim. The Glock magazine AR had not conquered the world, and specialized pistol magazine lowers were both rare and expensive boutique items
he ProMag Colt SMG block dropped into a standard AR lower, and bam, I had a Colt SMG based PCC. Guess what? I’ve still got it, and it still functions all these years later. At one point, I even goofed off with a bump stock before the orange coat banned them. It held magazines perfectly and ensured reliable operation.
ProMag also makes stocks, magazine couplers, and various odds and ends that seem to work well beyond their price points.