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Does anyone know whether the same bolt was used in all of the Mossberg 44US variations? If not, what are the differences? Thanks.
Mossberg 44US bolt question
Does anyone know whether the same bolt was used in all of the Mossberg 44US variations? If not, what are the differences? Thanks.
We confide in our strength without boasting of it; we respect that of others, without fearing it.” -Thomas Jefferson, 1793
only difference I know of is the rebuild rifles would be parkerised bolts. Originals would be blued and steel finish
Thanks n64atlas. So a bolt from a M44US(a) would function properly in a M44US(b) or (c) or vise versa? That would be very helpful, as any M44 US bolts seem to be rather hard to find.
Last edited by IditarodJoe; 06-07-2012 at 06:39.
We confide in our strength without boasting of it; we respect that of others, without fearing it.” -Thomas Jefferson, 1793
You would have to check headspace. I think these can be shimmed if the headspace is long. You may run into a bolt that that won't close. This would be a harder thing to fix.
different bolts and bolt parts from the 42/44/45/46 series of rifles can be interchanged. BUT with exceptions. the main one being that earlier civilian versions have a notch in the bolt face that corresponds with a "tab" on the end of the barrel under the chamber. the bolts with D&T holes for a shell deflector can be used in rifles not so originally equipped. there are also at least three different types of extractor designs, which are not interchangable from bolt to bolt. firing pins are particularly hard to find and I have purchased (and returned) a "new" aftermarket one that was absolute garbage. I have also found it was popular for the garage gunsmith to file on the sear portion of the firing pin to attempt to get a better trigger pull. check any FP you get closely and test before loading live ammo. HTH YMMV
UHHhhh...NO there is no place to put "shims" on these bolts and they were not so equipped originally. the rim of the cartridge fits into a recess in the bolt face. checking headspace in ANY bolt swap is always a good idea.
Originally Posted by n64atlas
The rear of bolt handle is the 'locking lug' on these rifles. This sometimes wears pretty bad when case hardening is worn thru or reciever gets worn. Thus you can get excess headspace. by using a very thin washer like shim, ahead of the bolt handle you effectively lengthen bolt. For long headspace (bolt will not close) you can file some on reciever where bolt handle locks down, but reciever may wear faster after that. Yes, I know this will affect other parts fit but we are only talking about thousands of an inch!
All things Mossberg...........................
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Dave, thank you for correcting my ignorant mis-information and Atlas please accept my apologies. I've scratch built several of these rifles from junkers and parts, but never had a headspace problem. it always puzzled me why CMP BR's were "rejected for headspace"
Last edited by tanker trash; 06-09-2012 at 04:57.
The CMP used people to check headspace, but not to fix it, if it was bad. A lot of clubs that had these rifles, stored the bolts seperat from the rifle. Some bolts were lost. I just picked up a 513T from a rifle club that had lost the bolt. I had a bolt in my parts bin. It headspaced fine, so now I have a comblete rifle. If it hadn't, I would have shimed the bolt on it, or recut the chamber, depemding on how it gaged.
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