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Japanese Type 99 Machinegun Caliber Conversions?


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#1 azboater

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Posted 01 April 2019 - 12:02 AM

I am interested in purchasing a type 99 machine gun
However would like to know if any board members knows a gunsmith who does a .308 caliber ( or other caliber) conversion on these?
I dont anticipate shooting it in 7.7 because of scarcity of ammo

Thanks In Advance

Edited by azboater, 01 April 2019 - 01:00 AM.

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#2 Black River Militaria CII

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Posted 01 April 2019 - 07:21 PM

Aside from what I mentioned in a post to you offsite, the T92 HMG ammo on strippers is semi-rimmed. For firing in T99s MGs in 7.7, I turn down the rim slightly so it beomes rimless. This ammo is the same as standard rifle ball ammo and functions perfectly in the T99s.
Caveat: the cintage Jap 7.7 ammo is very corrosive but careful cleaning by immersion in boiling water with the addition of some ammonia cleans it up perfectly. Swab the bore and gas tube with the same water. Never have had an6 lroblems with the ammo if thwt is done. FWIW

Edited by Black River Militaria CII, 01 April 2019 - 07:22 PM.

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#3 StrangeRanger

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Posted 01 April 2019 - 10:31 PM

A friend of mine makes rimless 7.7 Jap ammo from .30-06 cases, he says it's easy, just resize in a 7.7 die and trim.  The case head is approx. .002 undersized but the first firing takes care of that.  May be too much work for machine gun consumption rates though


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#4 DZelenka

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Posted 01 April 2019 - 11:46 PM

You can reload it with all new components for under a buck a round. How much ammo do you really need?
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#5 fifthmdec

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Posted 12 April 2019 - 06:06 PM

Jim Langley in Congress Az, did them at one time. Do not know if he is still around and if so, has any left. In .308...
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#6 DWTX

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Posted 28 May 2019 - 07:54 AM

Several years ago I made 12 .308 conversion barrels for Type 99 MG's, and sold them all on line. I started with Israeli .308 Browning 1919 barrels and had a local machinist turn them down to the correct profile. 

If you skip the cooling fins and the carry handle slot, it would be rather simple and low cost. You have to move your front sight/gas block to the new barrel. Over the years, I found several front sights in parts bins at gun shows and made full extra barrels.

 

Good luck on your endeavor 

 

DW


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#7 magnet69

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Posted 13 June 2019 - 04:14 AM

I have a Jap 99 MG w original mag and copies along with both 308 and 7.62x39 conversions that I would be willing to sell. Email me if interested. Thx.
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#8 APEXgunparts

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Posted 13 June 2019 - 12:53 PM

Jim Langley in Congress Az, did them at one time. Do not know if he is still around and if so, has any left. In .308...

 

Recently I have been in touch with Jim.
He is retired now, so doesn't make the Japanese MG parts.
I have 2 of his Type 99 magazines, and just the 7.62X39 barrel.
I lack the AK magazine adapter and the flash hider for the 7.62X39 conversion barrel.
If anyone has those to sell, please contact me.

Richard


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