MM Firefly Extractor Spring

The extractor spring is a small but essential piece that keeps tension on the Firefly's extractor, making sure it snaps back into position to grab the next spent shell after every pump cycle. It's tiny enough to disappear during a teardown, and once it's gone the extractor will stop clearing spent shells reliably even if the extractor itself is fine.

The MM Firefly Extractor Spring is the stock replacement part, sized to match the original spring so it fits straight back into the breech assembly alongside the extractor. If your Firefly has started leaving shells stuck in the breech, checking this spring before replacing the whole extractor is the cheaper fix to try first. It's a cheap part worth keeping as a spare, since it's the kind of small piece that's easy to overlook until it fails mid-game.