I recently won a Mossberg 144LSB at an on-line auction. The auction pics weren't the greatest, but I could tell there was something on the end of the barrel that I've never seen.

It arrived at my FFL dealer and I got a few pics before it went inot his safe for the "10 day cooling off period".

It is in pretty decent shape, with a sling, sights and a magazine

The knurled knob appears to be a thread protector for some fairly course threads. Does anyone have any ideas about the thing on the muzzle?

Thanks







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