this post was submitted on 14 Feb 2026
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I've seen the 203 on an aug before but I never actually saw the barrel mount for it.
The M203PI (for "Product Improved") seems to be a variant of the grenade launcher specifically designed for easier mounting on various rifles (built as a private venture by some company, not sure how trademarks works with regards to that, I guess "M203" is a military designation rather than a brandname so you can just name your product like that without legal issue?). The Steyr-devised solution seems to involve a whole new handguard that has to be attached, with the grenade launcher then going on that handguard
there's also their earlier attempt, which is pretty horrible looking