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"Homemade" 9mm/rimfire bolt action

MFG_BOP

Hi guys. Shooter from New Zealand here.
I may have finished my this project. I just need to polish it out and can call it done. I designed everything in Solidworks (somehow based on Rem 700) except for the back bolt and a good friend of mine that has a CNC shop (shooter too) made it for me (that's why it's not thaaaat "homemade"). Soon will send it out to have 2 barrels made. It's a 22LR and 9mm single shot action receiver using one action only: just change out firing pins, ejectors and front bolts (course, and barrels) and I am good to go, hopefully.
Made out of 17-4PH, 3D printed titanium bolt stop, 3 aluminum trigger hangers Rem 700 type with different cross pins spacing for more/less cock on close.
I want to shoot 22LR benchrest with it and for fun take my son to shoot the 9mm.
I am really bad at writing stuff but hope you guys like it :)
More to come.

Cheers
MFG

22LR_godoy_01.jpg
22LR_godoy_02.jpg
22LR_godoy_03.jpg
22LR_godoy_04.jpg
22LR_godoy_05.jpg
 
Last edited:
Thanks guys for the comments. Good or bad critics are welcome so I learn with them.
Forgot to say, but probably you guys have seen, that the threads are 3/4"-16. I have plans already made
to attach a Colt magazine for the 9mm. Any suggestion on mags?
cheers

9mm_mag_godoy.JPG
 
LFG BOP

I am impressed, and, having myself gone several times into the process, I think I knw what such a realisation implieson many aspects..

No critics more to the contrary, simple thoughts:
-The action seem to me quie long for such small rou,nds and the methof cocking I presume it uses?.
-Have you considered the problem of using a scope with top ejection?. Mainly is you made it as a repeater.
-At the cost of a few more parts, wuld it not have been better to have 2 bolts made from the start when the machine was set for them?
-You do not mention heat treatments. Are you intending to use the action parts untreated?. Despite the 630 qualities; it is not that much impact and wear resistant in' as delivered' condition.

Sincerely
Robert
 
george, moe, chris, daleboy, robert... thanks for that!
Robert, the action is 6.7" long. I wanted also to go shorter with it
but it was made around the 40-X bolt. If I made the tang shorter, I would have to
push the bolt stop forward, the bolt forward when retracted and not allowing the
cartridge to eject due to the ejector, in this case, being out of reach of the extraction.
Not sure if I was clear. I have never seen a Rem 40X in my life and I made it out of images
and info I've gathered from the net, to be honest.
I can post soon images of another rimfire project and the action is 6.5 inch long.
The ejection in this action will be sideways, kind of 30 degress. It didn't touch the
rail. My buddy made 4 actions: 3 for me and one for him. I also have 3 bolts laying around.
The action was machined in the H900 condition, and is around 42 RHC. Thinking about hard
chroming it cos I've been told by the heat treating company that it will not process successfully
thru black nitriding. Some experts out there?

Regards
MFG
 
MFG_BOP said:
george, moe, chris, daleboy, robert... thanks for that!
Robert, the action is 6.7" long. I wanted also to go shorter with it
but it was made around the 40-X bolt. If I made the tang shorter, I would have to
push the bolt stop forward, the bolt forward when retracted and not allowing the
cartridge to eject due to the ejector, in this case, being out of reach of the extraction.
Not sure if I was clear. I have never seen a Rem 40X in my life and I made it out of images
and info I've gathered from the net, to be honest.
I can post soon images of another rimfire project and the action is 6.5 inch long.
The ejection in this action will be sideways, kind of 30 degress. It didn't touch the
rail. My buddy made 4 actions: 3 for me and one for him. I also have 3 bolts laying around.
The action was machined in the H900 condition, and is around 42 RHC. Thinking about hard
chroming it cos I've been told by the heat treating company that it will not process successfully
thru black nitriding. Some experts out there?

Regards
MFG
Click to expand...

OK, pictures does no Always show clearly dimensions.

Effectively, 630 would not take nitriding. H900 is about 32HRC,which could be OK for the low pressures of the calibres intended, although that, personally, I would have preferred t precipitation hardened to some 40HRC.

If you want your actionand bolts in black, then ypou could consider PVD-DLC (Duamond-Like-VCoating) coating such as Tribo-Bond. This is a very nice depp black coating, very hard, wuth an excellent fricton coefficient.
Sincerely
R
 
hi robert,
H900 condition means the alloy is in the ± 45 HRC, somewhere there. Mine "clocked" 42 HRC before my buddy started machining it.
problem here in NZ we don't have a wide range of coating offer like you guys have up there. most common is nitriding or even hard chrome or
electroless nickel.
i will soon post other projects I am working on right now.
regards
mfg
 
Looks like a fun project! It's very interesting to me..It would also be interesting to let us see some targets
after shooting. Thanks for letting us see...:)
 
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