Thread: 9mm and rimfire bolt action

Hey guys. I may probably have finished my this project. I just need to polish it and can call it done. I designed everything in Solidworks except for the back bolt and a good friend of mine that has a CNC shop (shooter too) made it for me. 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 aluminium trigger hangers Rem 700 type with different cross pins spacing for more/less cock on close.
Hope you guys like it
More to come.

Cheers
MFG

You buggers never cease to amaze me. I couldn't make a bed if my life depended on it yet here you are making bits for firearms.

Clever bugger!

Originally Posted by Rushy

You buggers never cease to amaze me. I couldn't make a bed if my life depended on it yet here you are making bits for firearms.

Technically that particular bit is considered A firearm, not a bit of one....

Either way, it is awesome to see people developing these ideas. Would love to see the finished product.

Awesome

Would love to see more details about your software and machine setup.

What is the reason for the bolts top to be printed and the rest CNC ?

Nice work! I am looking forward to the rest of it.

hey guys, thanks for the comments.

ebf, the bolt STOP was 3D printed. Cheap, quick and lightweight and made to my specs. My friend has a CNC shop and I just designed it. Somewhat based on the Rem 40-X rimfire, but way shorter. And the raceways wont go all the way thru the receiver. It stops halfway in and done by sink EDM. Solidworks... nothing special.

need critics from everyone here, either bad or good, so I can improve it.

cheers

front bolt of the 9mm

very clever, i like the mid-locking design.

what is the longest case you could theoretically use with that setup ?

is the lug locking recess cut using EDM as well ?

using the same firing pin for both bolts ? so, offset bore for the rimfire ?

how does the bolt swap mechanism work ? I can see a groove on the rear of both bolt heads, but nit sure how it is retained in the bolt body. hope that makes sense.

I can see a major flaw with it... its fixable but its not a small job...



......you didnt make a second 9mm one for me.....

@Wingman, get in line, he needs to work on the left-handed prototype first

hey guys, thanks for that!!!
I can make it work for any pistol case as well, but I would have to full length wire EDM and make the tenon larger in diametre.
of course, adjust the extraction window and ejectors. locking lugs made by machining with a long carbide tool. different firing pins.
for the front bolt swap, there are 2 little holes and cross pins pins on the back bolt lugs that hold them together, but allows me to rotate the bolt freely.
the rimfire bolt is a PTG 40-X bolt.
I have another project that I can post soon if there's enough interest.
cheers

Thanks so much for posting the pics. I use solidworks too and really like it. You're lucky to have a friend with a machine shop!

Good idea to make rear locking to decrease bolt travel. How about dispensing with the bolt handle? (-:

Originally Posted by Cordite

Good idea to make rear locking to decrease bolt travel. How about dispensing with the bolt handle? (-:

Attachment 94596

Just like these ones I am making?