End of the Line Topic...[Forums Closing Finale] in Pony Free Posts Posted Friday at 08:09 PM · Report reply This isn't my gun. But it certainly looks like fun. My M14 variant is more old-fashioned, but it is no joke. And like the one below, its gas piston type is called short stroke. Both of these M14 variants are a lot of fun, and they make me feel like a giddy colt. And like their M1 predecessor, they both have a rotating bolt.