I have a question for you Hatsan MPA semi auto 12ga owners.
a few years ago we made some hatsan mag tubes for the MPA semi auto.
it seams that there is 2 types of thread setups.
ones were there are threads on the factory part of the mag tube that just stop before the forend.
And one where there is an un machined gap before the plastic handguard.
What we are trying to work out is which is the most common one, as we do not want to make 2.
I,m starting to think the one where there is a gam before it meets the handguard seems to be the one we see the most.
The reason we ask is, we have to machine that space In the mag tube to be able to do that.
Any help would be good.
BBB
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Hatsan Mag tube question for our customers
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Here's mine...I'd like an extension for it..
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Why no demand for a Hatsan pump extension? The threads are that different?
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cannot understand this myself....and we can actually fill the tube....
Originally Posted by EL34/6L6
Prost!
Berger -
Originally Posted by berger
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The threads are likely the same pitch...let the OP know which type you need so he can get to building them.
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I think the pump vs semi extension was visited before and Simon said the pump was different. (?)
Here's the threads on my pump. I would need a +1. Which is what I think most Hatsan pump owners would need.
Last edited by EL34/6L6; 02-26-2015 at 12:36 PM.
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Oh...that's kinda silly...
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Yeah, it appears my 870 mag cap fits, but is tapered so stops short. Maybe I'll have to try a 870 ??? Originally Posted by Tyroma
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Yes the thread "pitch" is the same on all 12ga hatsan shotguns , just the amount of threads and "gap" before the mag cap or exstention seats against eaither the forend ( on a semi ) of the barrle (lug on a pump) a pump.
The issue is if you don't get the correct amount of threads ( too few) it will not seat to many you end up with an internal gap that means you end up with threads that the follower and spring to catch on , as well as incorect chamfer between the first thread and the bore of the mag tube.
Its not as simple as it sounds.
