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Thread: Mac 11 a1 rpm

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    Mac 11 a1 rpm

    I recently found the device called the mac jack for the m11 9mm claiming to be as fast or faster than the mac 11 380 is this true will this make a m11 9 faster than its 380 brother and can the Mac 11 380 be sped up even faster to still be the fastest rof mac thnk

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    Registered User DistalRadius's Avatar
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    device exist for mac yes rate increase by limit of overtravel which make for short stroking of bolt faster than 380 possible punctuation optional wlcme

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    up to 3K RPM which is 2x + the atomic buzzgun.


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    This should exist for the Max-10/31.

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    Quote Originally Posted by Macdaddy69 View Post
    I recently found the device called the mac jack for the m11 9mm claiming to be as fast or faster than the mac 11 380 is this true will this make a m11 9 faster than its 380 brother and can the Mac 11 380 be sped up even faster to still be the fastest rof mac thnk
    ROF is a function of energy in, mass of bolt group, stroke of bolt group, and recoil spring rate. 9mm has more energy than .380, so the M11/NINE has more energy in. The M11/NINE needs greater mass in the bolt to hold the shell inside the chamber during the high pressure phase because of the greater energy in 9mm compared to .380. Reducing the stroke to the minimum for function would tend to increase the ROF. The more powerful round would tend to require a stronger recoil spring. A stronger recoil spring tends to increase the ROF as the stronger spring tends to return to bolt into battery faster than a weaker spring. Like the M10, the original M11 has very little stroke beyond the sear catch point. So it makes sense to me that with the greater energy of 9mm would tend to cause a M11/NINE with a blocked minimum stroke to have a higher ROF than a .380 gun. YMMV.

    Scott

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