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Report On Reconbobs Heavy 28 Actuator


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QUOTE (TAS1921AC @ Apr 10 2009, 10:55 PM) <{POST_SNAPBACK}>
Jim, Have you ever played with these? I don't know that I'd recommend them for long term constant use but a friend tried them and you can vary the rate of fire to suit your taste. The second link is a test results page done by the dealer.

 

http://www.blackjackbuffers.com/index.php?...products_id=190

 

http://www.blackjackbuffers.com/index.php?...1&chapter=0

 

TAS1921AC,

I've read about them on uzitalk.com, but never tried them. To be honest, I'd be afraid to use them. I've read stories and seen pictures of Uzi s cracking out the rear receiver plate and I can't help but suspect that they were either using something like this or shooting +p+ ammo.

I think I read somewhere that when shooting a properly balanced load in the Uzi, the bolt stops just short of the rear end of receiver. Haven't run any tests to confirm this, but if true, then a Uzi receiver should never crack.

Thanks for the info.

Jim C

 

We used to buffer the back of full sized UZIs with a folded up cardboard spacer to gain RPM - I personally prefer a 700- 800 RPM for a subgun, but I have a different attitude toward it since I was using SMGs tactically, and Really Like the ROF in MP-5K. But that was to put more hits on target in a faster time - The point in the UZI was to take up recoiling space and return the bolt faster. We played with dded springs, but that seemed to mess up timing and was not as predictable or successful. Personally I think the UZI is more accurate at a higher rater of fire, but that is just me. I note that the poly spacers advertised are Out of stock - anyone know where to find one ? I have a pre sample gun here begging for a higher ROF.....

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Shooter,

I have no way to accurately weigh the M1 & M1A1 bolts, but Frank I weighed similar bolts and mentioned it in his book on WW2 TSMG. He found no significant difference.

I don't think a fixed pin would work in a 28. It may cause the gun to fire before the Blish is fully locked. I admit I haven't really checked into this, perhaps reconbob could field this one.

I don't have 2 M1A1 bolts to run a firing pin length test. I do however have 2 M3 bolts. One has a .003-.004 inch longer pin than the other. I guess if I was prodded enough I could run the test on the M3. Buy the way, I keep the one with the longer pin in the gun, and that is what was used in above tests.

 

bob,

I might be wrong , but I think you just agreed with me. Good show.

 

All,

I forgot to mention , but I really like the 600 rpm rof of the Uzi. Another reason for not using a long buffer. Another thing, -- I really like using the silencer. A really unique experience.

Last Oct at Knob Creek subgun match I asked Andy Blasek (sic), a shooter 1000 times better that I, if he always used a silencer. His answer---Always.

 

just 4 grins,

I recently hefted a tungsten weighted bolt for a 9m/m M16 bolt. WOW . What a difference.

Jim C

 

I got out all of my my 1928 and M1 bolts and spare firing pins and measured the firing pins curious to see what spread there was in their overall length. There was a difference of 0.004 between the shortest and longest. Most measured within 0.001-0.002 of each other in the middle of the spread.

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