CMP Forums

CMP Forums (http://forums.thecmp.org/index.php)
-   How To's (http://forums.thecmp.org/forumdisplay.php?f=85)
-   -   BM59 build~ (http://forums.thecmp.org/showthread.php?t=220125)

cal50 12-08-2017 10:27 PM

BM59 build~
 
Got into this project helping a good friend. He decided to build a BM59 rifle and his project of one rifle turned into six rifles. The base receivers were USGI Garand drill rifles ( he had two Beretta receivers for his keepers ).

I always liked the Beretta BM59 but never purchased one back in the day. They were never inexpensive and the BM62's were even more. Sarco has been selling parts for several years and other vendors ended up with really nice parts sets.

My rifle is an ITAL model Beretta that came from Numrich Parts. The parts sets were excellent and complete minus barrel and receivers. The ITAL is the model with the tri-comp, bipod and grenade launcher sighs and gas cut off. The "E" model looks like a stretched Garand. "E" model barrels are around but the ITAL barrels have dried up and making your own is about the only option until someone makes a run of them.

Anyway you need a receiver for the base build. USGI Garand receivers are the same receivers Beretta used originally and the best you can use. Finding nice Garand receivers today is not simple or inexpensive. Enter the CMP "Drill Rifle" Garand. For a little over $400 you get a real USGI receiver that need a little work to bring it back to life. Drill rifles vary in demil state but expect the barrel welded to the receiver , barrel welded shut, op rod welded to receiver , etc.

Getting the welded barrel off is simple along the the op rod welded to the receiver rail. The receiver rail will need TIG welded up and re-cut where the op rod tab release notch is located.

Once you do the repairs to the receiver you can start to modify it to BM59 specs. Generally this is opening up the receiver legs to accept the Beretta 7.62 magazine, angle cut the legs. Mill magazine stops on the receiver for the magazine to net on. Slot the front of the receiver to accept the bullet guide and front magazine catch. Open up the hole to use the new retainer pin. Slot the bolt stop so it can reach the Beretta magazine and open up the window so the bolt stop can pivot.

Optional is adding a stripper clip guide to the receiver.

Getting started~

Garand receivers are TOUGH and you will need carbide tooling to machine it.
Front hole opened up, legs rough milled to accept magazine and angle cuts.

https://i.imgur.com/yHb6q23.png


Magazine now fits and mag stop surfaces milled~

https://i.imgur.com/AiJkY8t.png


Bolt stop area milled to accept Beretta bolt stop and pin inserted.


https://i.imgur.com/rNulp41.png

AR15 dust cover door hing pin used because its longer.
It will not "walk out" like the short factory pin that was retained by the auto parts.

https://i.imgur.com/mdlivdq.png

cal50 12-08-2017 10:28 PM

Not my pics but a side by side between a Garrard receiver and modified for BM use.

Side view~

https://i.imgur.com/MecVifY.jpg

End~

https://i.imgur.com/sXrOJPT.jpg

Bottom~

https://i.imgur.com/GOE72pL.jpg

Front~

https://i.imgur.com/XW6GRPR.jpg

cal50 12-08-2017 10:29 PM

Adding the stripper clip guide~

Putting a hole in the right spot is important~

https://i.imgur.com/kBJb9uH.jpg?1


Just right~

https://i.imgur.com/5jGktUx.jpg?1

https://i.imgur.com/hw3JEGL.jpg?1


It will be TIG welded from below~

https://i.imgur.com/BpYEWUG.jpg?1


After welding and ground flush~

https://i.imgur.com/9PCMI9T.jpg?1

cal50 12-08-2017 10:30 PM

Getting the receiver done I was ready to barrel the receiver.
I am building an ITAL model and the barrels are made from unobtanium. My friend was lucky enough to have a factory Beretta original to take dimensions from.

I used a .308 Criterion M1Garand barrel that needs reworked.
It need shortened along with a new gas port hole , splines and re-threaded for the gas lock.

Its short chambered so minimal reaming was needed for correct headspace.

I use a modified socked extension on a 1/4" drive ratchet. A 3/8" drive socket extension fits perfectly on a chamber reamer. I simply cut it off and TIG welded in on the extension with a flex drive. You slide the reamer in the chamber , slide the drive on , twist a few times , remove and check headspace and repeat.

Tools ready~

https://i.imgur.com/LWSS72J.jpg?1


Go slow and check often, you want it right, not fast.

https://i.imgur.com/b7oQnVf.jpg?1

cal50 12-08-2017 10:31 PM

The USGI drill rifle receiver was welded on to demil it. All the ones I have seen have been welded with stainless steel filler rod. This will not conventional take blue or park. You can use Oxynate 84 that works on stainless steel if desired.

I had some left over Norrel SOCOM black Moly Resin that I applied to my receiver. I blasted it lightly and then applied with airbrush and baked it to cure.

My wood was in nice shape and only needed some light dents and dings steamed out and a few coats of tung oil. Beretta used nice walnut.


Now I am ready for a range trip~

https://i.imgur.com/TOn6rpq.jpg?1

https://i.imgur.com/zV0Lij0.jpg?1

https://i.imgur.com/EVusjw4.jpg?1

https://i.imgur.com/cmk8zkb.jpg?1

bruce 12-09-2017 07:14 AM

Outstanding! Great pictures, etc. Will follow this thread with interest. Sincerely. bruce.

ZBeast 12-09-2017 01:03 PM

Bula Forge makes BM-59 barrels.

Eliyahu 12-10-2017 08:12 AM

Quote:

Originally Posted by ZBeast (Post 1662182)
Bula Forge makes BM-59 barrels.

Yep, reportedly priced at $175 - cheaper than moist Garand barrels!

Eli

cal50 12-10-2017 02:04 PM

If you are planning an ITAL build grab one of those barrels.

cal50 12-10-2017 02:05 PM

Reference~

https://i.imgur.com/pzMeJ8M.png

https://i.imgur.com/LKOwmQA.png


All times are GMT -5. The time now is 06:31 AM.