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I believe the ROF is closer to that of a Full size MP5. I Know its definitely slower than a K gun.

The Bolt Carrier I believe is a MP5K but uses a custom recoil rod specific for a K carrier and full size receiver.
 

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I should think you could use either bolt carrier... but the rod would have to be shorter, in either case. Length would depend on the carrier used, I guess.
 

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Closer ROF to a std MP5. Video on my YouTube channel.
 

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So, the correct answer is a MP5K bolt carrier,MP5K recoil rod assembly and a MP5K cocking tube support? This will work in the BMP MP5 reverse stretch barrelled uppers?
 

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I have a CA. It uses a K front end and carrier. The recoil assembly is somewhere between a full size and a K. I find mine runs a little faster than my Vollmer converted 94, but I can still pull singles. Here in Las Vegas, I've found that factory 147 gr can go supersonic in my full size. With the 5.5" K barrel that has not been an issue with the CA gun. I certainly prefer running a can on it as opposed to running a can on a full size. With a can on a full size, I find it to be very muzzle heavy. The MK9K or Raptor on the CA gun is much less muzzle heavy. Good luck with your reverse stretch project.

Scott
 

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So, the correct answer is a MP5K bolt carrier,MP5K recoil rod assembly and a MP5K cocking tube support? This will work in the BMP MP5 reverse stretch barrelled uppers?
No... The BMP reverse stretch, will use the Mp5k carrier, mp5k cocking tube support, mp5k recoil spring and custom length recoil rod. Take a MP5 recoil bare rod and cut it down to 8". Then install Mp5k recoil spring and end caps. Rivet it together and you're in business.

I have two of the beloved reverse stretches and they are my absolute favorite... Until my PCS 52k is done!
 

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No... The BMP reverse stretch, will use the Mp5k carrier, mp5k cocking tube support, mp5k recoil spring and custom length recoil rod. Take a MP5 recoil bare rod and cut it down to 8". Then install Mp5k recoil spring and end caps. Rivet it together and you're in business.

I have two of the beloved reverse stretches and they are my absolute favorite... Until my PCS 52k is done!
Thank You! Thank you for answering my question! Now I am glad I haven't bought the bolt group. This forum rocks.
 

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Yes, basically from the trunnion forward plus the bolt group is MP5K parts in a full size receiver. The mag catch parts are all the same for 9mm guns. Trigger group, rear sight, and stock or pistol cap for a full size. The only custom part that I am aware of is the recoil assembly. It is longer than the standard K but shorter than a full size. It is my favorite of the 9mm guns. YMMV.

Scott

As an aside I miss JT (the OP). He was a great guy and always helpful without being condescending. R.I.P. John.
 
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