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Odjur 06-05-2012 04:24 PM

b2k and promaster compability
i know you can swap valves, but what about the lpr?
would one from a promaster fit a b2k?

Nobody 06-05-2012 09:55 PM

the threading for the LPR bodies is the same, but the stem in which the valve spring sits on are different lengths. if you are looking for a new LPR, AKALMP still sells B2K/PM LPRs, you would just have to specify one for a PM and not the B2K.

63VDub 06-05-2012 09:59 PM

The LPR threading is technically the same, but some of the PM bodies have super tight tolerances. I have had to take a thread file to a B2k LPR to make it fit. Never had a problem putting a PM LPR on a B2k, though.

peters1983 06-05-2012 09:59 PM

The lpr stem(spring perch) on the promaster is longer than the b2k, the stems are interchangeable though. Or a shorter spring may work.

Edit: got beat to it lol.

Odjur 06-10-2012 07:21 AM

So a Promaster LPR does fit and function? Sweet!

peters1983 06-11-2012 02:12 AM

It will as long as you use the bushmaster stem or possibly a shorter spring. Other than that it should fit and function without other modifications.

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