operating handles are ambidextrous and non-reciprocating.
We looked into a SUB2000 style rifle too, but there were too many issues to overcome compared to the "R-31" style shown above. The above design uses the same exact trigger mechanism and grip shape as the PMR-30 so it will feel the same and function the same. Collapsible stock makes it still nice and compact, and the stock rods are shaped to still provide a nice cheek rest (which is often a problem with collapsible stocks). Lots of aluminum extrusion is used for the upper assembly, and the rails on top and below are removable. rear sling mount is built in, front sling mount is removable and reposition-able. Thinking about having it come with magpull flip-up sights (like often seen on AR's). Flash hider likelly will not come with it, probably just a thread protector.
it would have been nice to have the stock rods below the ejection port, but it couldn't happen without getting in the way of the safety levers. putting the rods above the port also allowed the rods to be moved closer together for a thinner profile, and they could be rounded and used for a cheek rest. It's not unheard of to have the rods higher than the bore. (HK MP7 is like this) I think the reason it looks a little strange is because there are no optics on it. The distance between the cheek weld and the rail is nearly identical to a flat top AR so any optics that work with that, will work well here.
pretty much all the grip parts are common with the PMR-30 pistol (except the grip halves, frame, and ejector). Same hammer, springs, trigger, slide stop, mag catch, fasteners, and so on.
straight blowback is the way this one is setup, but there is room for a delayed blowback system also (if necessary). Hybrid action (like the PMR-30) should not be necessary in a rifle length barrel. The main reason it is needed in the Pistol is because of the wide variation in the pressure levels of different .22WMR ammo in such a short barrel. Shooting thru a longer barrel will have less variations in pressures and should allow for a straight blowback system to work well, even with a wide range of ammo.
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