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Spump/Bolt Action MR4?


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#1 nu2this

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Posted 29 August 2011 - 09:59 PM

Well i have no use for my MR4 as of late so i want to do something with it. I would really like to make it a bolt action, first strike "sniper". We will burn the first strike bridges when i have more free time. I went through vikings website spump tutorial and it sparked a few questions. First, would i really have to slot the striker, allowing the bolt to move up passed the ball stack? The regular action of the MR4 doesnt do this so why would i have to modify it that way? Shouldn't i just have to disable to blow back on the valve and after each shot, recock the striker and bolt on the sear? More questions will probably arise with more thinking but thats all for now.

#2 ExtremeFacepainter

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Posted 30 August 2011 - 12:19 AM

Yes there is a reason for slotting the striker but I'm unsure of the reason at the time.

#3 junits15

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Posted 30 August 2011 - 06:05 PM

Yes there is a reason for slotting the striker but I'm unsure of the reason at the time.


it turns it into a closed bolt
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#4 Molybdenum

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Posted 30 August 2011 - 06:31 PM

You could do it without slotting the striker. Slotting the striker is solely for the purpose of allowing the bolt to move independently of the striker.

#5 junits15

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Posted 30 August 2011 - 06:45 PM

You could do it without slotting the striker. Slotting the striker is solely for the purpose of allowing the bolt to move independently of the striker.


then its not bolt action, bolt action means u manually move the bolt backwards and then forwards, without slotting the striker it would move backwards and just cock
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#6 nu2this

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Posted 30 August 2011 - 06:57 PM

^ Essentially thats bolt action, or pretty damn close as long as it doesnt recock on its own which means its a semi, just wouldnt have the back and forward like real rifles. They tell you to slot the striker to allow the bolt to seal the ball stack off prior to shooting but by doing that i would have to reposition the detents to allow the ball to move into the forward postition as well. Just seems kinda unnecessary for all that. Wouldnt that slow the ball down as well because the intial movement of the bolt coming forward is canceled out?

#7 DruidicRifleman

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Posted 31 August 2011 - 01:33 AM

It's been done and is very double

You need to Separate the Bolt from the hammer So you Can Control when the ball is loaded

Infact

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#8 nu2this

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Posted 01 September 2011 - 10:15 PM

thats a lot of stuff done to that, very nice. project will start soon, keep you updated




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