- Location
- SE corner Sk
Is it possible to rebarrel a Zastava M70 with a Mauser barrel? Thinking of pulling off my 6.5x55 and putting on a cut down barrel to make it a carbine.
Rebarrel a Zastava LK M70
- Thread starter MilitaryCollectorMark
- Start date
- Location
- Western Manitoba
There are two distinct diameters of Mauser barrel tenon thread - the "large ring" m98 size (1.10" diameter and 12 tpi), and the "small ring" m96 size (circa 0.980" diameter and 12 tpi). I understand that original Mausers used 55 degree thread angles, although many or most USA made Mauser barrels use 60 degree thread angles, that seem to work. I have found differing lengths of barrel tenons as well. I presume that you want to swap to one that is pre-chambered in 6.5x55. I am not familiar with "drop in to head space" made available for the Zastava M70, but maybe there is? If you find a scrap "Mauser" barrel with suitable chamber and large enough barrel tenon, then that can be turned down and threaded to match to the Zastava rifle? I do not know what threads or size is used on the Zastava M70 receiver. The head space will be a combination of the fit of that bolt to that receiver, and then the chamber that is cut in that barrel, so you can have a particular rifle that has correct head space - unscrew that barrel and install on another receiver and might get really bad head space. Same thing can happen by swapping out the bolt.
There can be several thousands of inch difference on receiver seats or bolt lugs - SAAMI calls out 0.010" difference between a "GO" (Minimum) and a "FIELD" (Maximum) headspace gauge for 6.5x55 - I do not know what the dimensions used in Sweden military armoury were, but I think they were different (longer) than what SAAMI calls out. A "NOGO" headspace gauge is often 0.003" or 0.004" longer than "GO", but I have not been able to find a SAAMI definition for it - I assume that a "NOGO" gauge is not a SAAMI spec. thing, but I have a Clymer brand headspace gauge "set" of "GO" and "NOGO" gauges that is marked "SAAMI Spec." on the container, although I have not found such a SAAMI Spec. for a "NOGO" gauge - it might exist, and I simply have not found it yet.
FYI - I found a table on Internet that says Zastava M70 is same threads as Mauser m98 - but that was not a Zastava website, so I am not sure that is correct.
There can be several thousands of inch difference on receiver seats or bolt lugs - SAAMI calls out 0.010" difference between a "GO" (Minimum) and a "FIELD" (Maximum) headspace gauge for 6.5x55 - I do not know what the dimensions used in Sweden military armoury were, but I think they were different (longer) than what SAAMI calls out. A "NOGO" headspace gauge is often 0.003" or 0.004" longer than "GO", but I have not been able to find a SAAMI definition for it - I assume that a "NOGO" gauge is not a SAAMI spec. thing, but I have a Clymer brand headspace gauge "set" of "GO" and "NOGO" gauges that is marked "SAAMI Spec." on the container, although I have not found such a SAAMI Spec. for a "NOGO" gauge - it might exist, and I simply have not found it yet.
FYI - I found a table on Internet that says Zastava M70 is same threads as Mauser m98 - but that was not a Zastava website, so I am not sure that is correct.
Last edited:
