a marker that could use first strike rounds that isn't an overpriced sidearm would be really nice. Even if each round has to be hand loaded, it would be nice. What about making the breech mechanism a barrel similar to most revolver hand guns? Preload 6 rounds, gun rotates barrel automatically when you retract the bolt and prime/cock the marker again. When the bolt is seated in the fire position, it's actually sitting inside of one of the 6 bores of the revolver barrel. Self contained? No remote lines? Even better. Lightweight? More pluses. Don't go overboard and put a barrel on there longer than 16" though. And don't fuss with rifling or any of those gimmicks. Integrated expansion chambers towards the business end of the barrel would be nice too. Especially if you can access the baffeled area of the expansion chamber and put paint absorbing materials in there for ease of cleaning in case you have a barrel break
I would definitely pick one up.