Why no rotating barrel rifle/PDW? >locking mechanism in front of chamber reduces overall length

Why no rotating barrel rifle/PDW?
>locking mechanism in front of chamber reduces overall length
>you can have like 6 rows of locking lugs if you want for extreme pressure tolerance
>bolt can be heavy as fuck for reliability
Seems like you could make an extremely short and powerful long gun with this operating mechanism. What keeps such a clever locking system from seeing more use?

  1. 2 weeks ago
    Anonymous

    Suppression. Rotating barrels suck for that. They tend to unthread the suppressor. But yeah, other than that I see your point.

    • 2 weeks ago
      Anonymous
      • 2 weeks ago
        Anonymous

        Okay but does it stay after 2 mags?

  2. 2 weeks ago
    Anonymous

    Youre retarded, rifle barrel is too long to practically rotate for unlocking not to mention accuracy issues. then you have heavy as fuck reciprocating mass making wild recoil. Big brain time, how about we reverse things and make the barrel fixed and have a smaller bolt ROTATE to unlo- oh wait thats fucking ARs, AKs, AR18s, and 80% of other semi auto rifles on the fucking market.

    Youre retarded but in an funny sort of way

    • 2 weeks ago
      Anonymous

      >rifle barrel is too long to practically rotate for unlocking
      Doesn't even have to be that long, which is kind of the point. 8-10" is PDW length and not a huge stretch from pistol length.
      >not to mention accuracy issues
      Plenty of reciprocating barrel rifles already exist. It wouldn't be sub-MOA by a long shot, but perfectly usable within 200 yards, which is more than enough for the situation you would need a super short gun for.
      >heavy as fuck reciprocating mass
      Lightening cuts, bro. It would be enclosed so you don't have to worry about debris like with a pistol.
      >rotating bolt
      I will excuse the sarcasm but I just gave multiple advantages over the standard rotating bolt.

      • 2 weeks ago
        Anonymous

        A rifle barrel would be too long. You ever watch a rifle get shot in slow motion? The fucking barrel flops around like a wet noodle. The lack of a bushing to support the front end of the barrel while cycling would mean a lot of stress on the bearing surface the barrel would rotate on.

        Pistols can get away with it because A: The barrel is short, and B: they have a second bearing surface on the front of the slide.

      • 2 weeks ago
        Anonymous

        The point is that in a recoil-operated gun, the reciprocating mass would have to meet some minimum weight for cycling purposes.

        Another source of bulk and weight would be the carriage for the barrel, inside which it must rotate, and which has to keep the barrel pointed straight. Gas operation for rifle cartridge just mogs. Sure, your carrier will be longer by the length of one extended bolt, and the cycle distance will be commensurately longer, but you keep the weight down and get near perfect mechanical accuracy with a fixed barrel.

        For pistol calibers, CMMG’s radial delayed blowback is a really elegant solution. It’s a rotating bolt with angled cuts behind the lugs that are forced to rotate under pressure from the case, and which forcibly move the carrier back a longer distance. It’s an even simpler version of HK’s roller delayed blowback.

      • 2 weeks ago
        Anonymous

        >Lightening cuts, bro.
        thus concludes my annual revisit of PrepHole. this place is just occupied by children now.

  3. 2 weeks ago
    Anonymous

    >No rotating barrel PDW
    She exists, (You) are just too poor.

    • 2 weeks ago
      Anonymous

      what tactical advantage does a rotating barrel PDW offer?

      • 2 weeks ago
        Anonymous

        Less recoil than direct blowback, less mass in the bolt and therefor a lighter gun overall. It’s insane how light the TP9 is. If it were direct blowback in that size it’d be uncomfortable but because of the locked breech rotating barrel system it tames the recoil quite a bit considering how little weight and mass there is.

        • 2 weeks ago
          Anonymous

          so why not roller delayed or even just recoil operated?

          • 2 weeks ago
            Anonymous

            It is recoil operated you dip, roller delay works too but it is annoying as hell to make.

  4. 2 weeks ago
    Anonymous

    Grand power rotating barrel, European 9mm top shelf

  5. 2 weeks ago
    Anonymous

    If you're focused on compactness for strength, go with a toggle lock.
    Use a gas piston to break the toggle because its cheaper than recoil or delayed blowback methods.
    Toggles are very strong and result in a short action for it.

    Better than trying to do something with a rotating barrel. Recoil operation in general isn't the best.

  6. 2 weeks ago
    Anonymous

    If reducing overall length is desirable feature, magazine goes in the grip

    • 2 weeks ago
      Anonymous

      >just put it in the grip bro

  7. 2 weeks ago
    Anonymous

    the rotating barrel thing really isn't that useful on the 9mm px4. you need a slower round to notice it.

  8. 2 weeks ago
    Anonymous

    What about the Steyr TMP?

  9. 2 weeks ago
    Anonymous

    >tfw when I learned about the extended px4 barrels long after they were discontinued
    >tfw I will never find one
    Life is pain

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