Pistol build

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   A bit more progress on this next build. I have formed the breech using pre drilled alu square bar I got from Aliexpress.. The hole is 10 mm, so I turned down the barrel to fit and I have 10 mm stainless rod to make the probe. This fitted together really well after I formed the hollow probe onto one end.
I still need to make a pellet tray and figure out the best way to attach the breech to the main tube, but everything fits together really well and the cocking is really positive and feels great using cap screws instead of a pin. 

I have figured out I need to make the actual hammer longer so the screw is further back, as how it is now, the probe won't travel back enough to load the pellet. the extra size of the cap heads cause this.  All in the name of product development.

I am planning on this being a straight pull bolt with a lockup mechanism. If I was making a revolving bolt that you lift and pull, I would need a meatier breech so that 90 deg channels could be cut into it to lock up probe for firing.

I used a 32mm round wood routing bit to form the bottom of the breech to fit the main tube. 

The stainless is really good to work with and my tooling seems to handle it well. The hollow probe comes out really well and I seem to be able to make them quite easily now, especially with the mill. I use the end mill to form the hollow part by plunging down and this comes out nicely with just a little bit of filing required. The mill also ensures a proper 90 threaded hole in the probe for bolts, and in this case a cap screw for the cocking lug.

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1662	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 27 Nov 2023 at 2:40am
	A bit more progress on this next build. I have formed the breech using pre drilled alu square bar I got from Aliexpress.. The hole is 10 mm, so I turned down the barrel to fit and I have 10 mm stainless rod to make the probe. This fitted together really well after I formed the hollow probe onto one end. I still need to make a pellet tray and figure out the best way to attach the breech to the main tube, but everything fits together really well and the cocking is really positive and feels great using cap screws instead of a pin. I have figured out I need to make the actual hammer longer so the screw is further back, as how it is now, the probe won't travel back enough to load the pellet. the extra size of the cap heads cause this. All in the name of product development. I am planning on this being a straight pull bolt with a lockup mechanism. If I was making a revolving bolt that you lift and pull, I would need a meatier breech so that 90 deg channels could be cut into it to lock up probe for firing. I used a 32mm round wood routing bit to form the bottom of the breech to fit the main tube. The stainless is really good to work with and my tooling seems to handle it well. The hollow probe comes out really well and I seem to be able to make them quite easily now, especially with the mill. I use the end mill to form the hollow part by plunging down and this comes out nicely with just a little bit of filing required. The mill also ensures a proper 90 threaded hole in the probe for bolts, and in this case a cap screw for the cocking lug.

Billbobnz Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 14 Jun 2020 Location: Ashburton Status: Offline Posts: 918	Post Options Post Reply Quote Billbobnz Report Post Thanks(0) Quote Reply Posted: 27 Nov 2023 at 3:26am
	That looks awesome

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 27 Nov 2023 at 7:49am
	The strait pull bolt sounds the go. Be dam handy thing to know, if you start with mags as well. Sweet work Pauly, gonna be fun watching you devolp and fine tune the pistol. Got a name brewing for it?

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1662	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 27 Nov 2023 at 8:59am
	I don't think mags will be too hard to do. Yea I'm working on a name. My initials are PB [chemical symbol for lead] so working on that maybe. PB Air

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 27 Nov 2023 at 10:02am
	it's a nice play on your name and lead. It's short and catchy. Would work.

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1662	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 09 Dec 2023 at 3:41pm
	I completed the main part of the build tonight. The bolt is spring loaded, so you pull it out then back to cock, and it'll lock back in when you push it forward. I made a steel plate for it to ride on rather than the stainless chewing away at the aluminium. I also cut dovetails into the top. I will be putting it onto a different trigger frame with walnut grips, but it doesn't look too bad like that and it functions. I still need to pull it all apart, polish and clean everything before I fill it. but I am really pleased, as I have basically made everything apart from the barrel and trigger frame.

Billbobnz Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 14 Jun 2020 Location: Ashburton Status: Offline Posts: 918	Post Options Post Reply Quote Billbobnz Report Post Thanks(0) Quote Reply Posted: 09 Dec 2023 at 3:57pm
	That's some nice machining, your diagram drawings look like mine haha

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1662	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 09 Dec 2023 at 4:32pm
	Haha, yea, I have an old school note book that I write stuff in. Sometimes you have to draw it to figure out what you plan to do. And so that you don't forget it.

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 10 Dec 2023 at 3:32am
	nice work looking good.

RangerPete Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 19 Apr 2023 Location: Cambridge. Status: Offline Posts: 1023	Post Options Post Reply Quote RangerPete Report Post Thanks(0) Quote Reply Posted: 10 Dec 2023 at 10:12am
	Very impressive Pauly what pressure do you plan to fill the cylinder to? Im looking forward to seeing some groups
	Walk quietly, but carry a big stick.

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1662	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 10 Dec 2023 at 10:47am
	If it's anything like the last build, 2000 psi seems to be best for this unregulated setup. More pressure and the hammer can't hit the valve hard enough the way it is, and the first few shots are really slow until the tank drops in pressure, so it's a waste to go higher. So I have now dissassembled it and have washed everything to get rid of any swarf and oils. It's amazing how much work goes into this. Each of the caphead screws that retain the valves has been turned down to perfectly fit the hole and countersunk hole in the valve blocks. This means no movement when the tank is pressurized and they all bear the load equally. There's more, but that'd get boring. All clean and dry awaiting refitting.

J-S Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Senior Member Joined: 20 Oct 2014 Location: Auckland Status: Offline Posts: 484	Post Options Post Reply Quote J-S Report Post Thanks(0) Quote Reply Posted: 12 Dec 2023 at 5:00am
	Looks bloody cool. Like the straight pull cocking!
	J S Airguns Air Arms TX200('s) Theoben Sirocco HW77 FWB 300s Webley Patriot One or two others... Current projects: Too many..

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1662	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 14 Dec 2023 at 5:51pm
	Time for duelling pistols. Completed the second build and had a quick shoot. putting out 10 fpe. Still some things to refine, but shoots nice.

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2617	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 15 Dec 2023 at 2:21am
	looking good Pauly. Like the breech on second. What's the size difference compared to original. 10 ft. Lb is a good amount of power for a bird gun. Fancy chucking a stock on one and testing it out to 30m? Be keen to see its accuracy when it streaches out a bit. Whats the end goal? Hunting pistol, target pistols? Decided on a finish for them or you they stay metal?

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1662	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 15 Dec 2023 at 2:55am
	End goal? Enjoyment, and functionality. It is a really interesting question though as sometimes the build is directed by what you can do, then as you get more confidence it changes. For example the latest one I made the breech myself and it has it's quirks, but on the next one I know better what to do. I don't plan to change colour, but have wondered what home anodising would look like, but quite like that semi polished alu with black or walnut look. Giving them a polish seems to harden the surface a bit too and they don't mark as much as unpolished. They are both the same tank size and calibre. Latest has a shorter barrel. Yea, I will try the stock on them, as I am keen to see what they go like at longer distances too. I will put a rifle scope on also as the pistol scope is challenging to use.