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Finishing up M1A1 Postie Build


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#1 Eyes Of Death

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Posted 16 November 2019 - 04:31 PM

  Parts kit came from Bowman Arms, seams to have had very little use. The 80% receiver came from Bob at Philadelphia Ordnance. And the 1928 bolt conversion block came from Bowman also. I went ahead and modified the conversion block to make the bolt a M1 style retracting firing pin. I still need to find a foregrip strap bolt and nut. I'll probably just blast and park the one I have in it for now. I think I'm just going to park the new receiver, barrel and leave the rest original. Looks like plenty of cosmoline is in the fire controls to be able to coat the new park job with it.

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#2 darrylta

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Posted 17 November 2019 - 12:12 PM

is this a postie gun or a display gun.

Either way, it's great!

Darryl


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#3 Eyes Of Death

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Posted 17 November 2019 - 07:54 PM

Its a postie!!!! No fun in building something your afraid to shoot every chance you get!!!!

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#4 reconbob

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Posted 19 November 2019 - 09:47 PM

   You are the first person I have known of that has successfully used the conversion block.

To use the block requires that the original M1928A1 bolt be machined to accept the M1/M1A1

cocking handle. How were you able to locate the cut and how were you able to machine the

bolt since they are quite hard? And how is the block retained in the M1928A1 bolt body? Any

info greatly appreciated....

 

Bob


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#5 Eyes Of Death

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Posted 26 November 2019 - 02:38 PM

Bob I fitted the convershon block to the 1928 bolt first. Had to grind just a little off the recoil spring hole side .010" range.  And it sat a little high to about the same .010" ground that off to. To locate the cocking handle I used a vise work stop. And placed the conversion block spring hole to the stop and the top of block to the fixed side of vise. I located center of cocking hole in the mill and just replaced to block with the 1928 bolt. I just plunge cut a .5" carbide end mill straight down threw the bolt. It cut easy but feed was very slow. To make the block work with the firing pin I milled a .25" slot center of block and .125 past the centerline of cocking hole. 

 

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