Monolithic Nelson

[Lane]

Working on this a little here and there, essentially a nelson design where the frame and body are a single extruded piece of aluminum. Goal is to get a marker that is Autococker threaded, integrated under-cocking kit (pump arm attachment points machined in the same op as the barrel insert to ensure good alignment), bore drop (detents to be added), and generally a lower cost to manufacture. Since a lot of the features and body contours can be captured in the extrusion the number of secondary ops and material removal can be fairly limited. Also, with the slide in barrel insert it would be possible to swap barrel threads. Lastly, two attachment points for the feed to better support a SC feed or hopper. One important feature not shown yet is an aluminum or delrin "dust cover" to fill in the void beneath the pump arm and front of the trigger group area. Frame would be a 1911 style that connects to the valve body to retain it in place. Trigger would have a thickness of 3/16" (same as pump arm) so slightly wider than a Phantom. As it stands right now, the single piece body comes in at 8 oz. Could probably drop it down another 1/2-1 oz pretty easily with the machining not yet shown.

[iamthelazerviking]

Wow whoa wow

[iamthelazerviking]

Sign me up

[BlindFaith429]

I like it.

Phantom internals would be cool (since they are so common).

what about air going to the valve? Back bottle only? Or would you do side-taps like phantoms?

[XEMON]

Easy enough to yo a asa adapter, they're cheap and readily available ...

[Lane]

I like it.

Phantom internals would be cool (since they are so common).

what about air going to the valve? Back bottle only? Or would you do side-taps like phantoms?

You could pretty much set it up anyway you could Phantom, I just through the back bottle on there as it's a model I had from another design. I've got holes going through the under-cocking arm location and into the trigger guard so a Vertical ASA could be done similar to a phantom.

The hammer is very similar to a Phantom, however I need to go with a different bolt design to keep it bore drop.

[Chuck E Ducky]

Cool I like the concept. Pump kit looks a lil bulky for my taste. I would definitely like to see a VSC setup. Regardless a dual hole SC feed has me excited as that will fit on an bunch of different markers.

[XEMON]

The hammer is very similar to a Phantom, however I need to go with a different bolt design to keep it bore drop.

Now that gets me really excited!
I would love to be able to get modern, decently priced bore drop nelson ...

[Lane]

Cool I like the concept. Pump kit looks a lil bulky for my taste. I would definitely like to see a VSC setup. Regardless a dual hole SC feed has me excited as that will fit on an bunch of different markers.

Pump is shown as 1.75" diameter at the moment. VSC would definitely be an option. Actually considering going to a tapped trigger guard like the Retro7 as it frees up some geometry within the guard since you don't need to account for fastener heads.

Size wise here's some images of the body next to a Phantom. The valve is not the proper diameter but close (.1" smaller).The body it self if slightly shorter than a phantom but that doesn't include the barrel insert; with the insert it would be about a 1/2" longer than a Phantom body. Height is very similar (top of the body to the base of the frame / trigger guard). Still need to work on the trigger guard / frame a lot more, not crazy about the current look. Also may move from an AR15 style grip geometry as the grip would need to be proprietary to hold the valve in place and there may be additional features I can add in there by doing so.

[Nish]

Lots of cool ideas here. I like hwat you have done so far and can't wait to see how you get the trigger in there.

[Chuck E Ducky]

Slider or Hinge? If you need pictures of how RTR dose it I have an extra frame I can take pictures of.

Actually it may need to be a hinge and drop/ pin in. Going to need to figure out something different with the Trigger spring to. Going to be hard getting it in that without being able to separate the body from the grip frame the way CCI dose it. Probably going to have to re think the trigger spring return.

Can you do the dual rods side by side instead of over under. I think it would clean up the look and still provided the anti twist action your looking for. You could then go with a lower profile handle. It would look a lot cleaner IMO. I like what you are doing. The plan is to have these CNC out of aluminum?

[Lane]

Nish Fishing the trigger in there will be a little tricky but I think it's doable; the extruded slot allows it to be installed from the backside of the body with probably the use of a special tool. Would need to work the spring in there as well but not out of the realm of possibility.

Chuck E Ducky I'm leaning toward hinged because it's fairly simple and cost effective. I do like the idea of side by side pump arms; mocking it up it seems pretty straight forward however it puts all the guides near the top of the pump handle. I may look at move a pump guide down so it's concentric with the top vertical ASA screw. I do like that the side by side makes both guides thread in with no interrupted cut in the tapped hole and moving one guide down in front of the vertical ASA screw would still allow this. For manufacturing, yes aluminum. Would need to tool an aluminum extrusion to make it a viable option.

One tricky thing I'm looking at now is how to stop the backward pump stroke to keep the valve from burping on the back pump. Putting a pin in to stop the pump arm interferes with the sear. I'm considering going to a flat pump arm (laser/waterjet or machined) instead of the 3/16" round pump arm. Then I can easily have it stop on a pin through the body. This may also help twist in the pump and allow you to go down to one pump guide from the current two as it would have good contact with the inner extruded faces. Might mock something up later tonight.

Also, looking at a sliding or push button safety in front of the trigger.

[Nish]

Would it be easier to do from inside the trigger guard and use magnet returns instead of springs? Creating special tools to put it together seems like a pain. Just a thought.

[Chuck E Ducky]

CCI uses just a roll pin at the end of the channel the pump arm rides in. It knocks against the roll pin at full pump.

[Lane]

I think it could be done without the use of a special tool, just may be a little finicky. Special tool would may be required if you wanted to get build time down on multiple markers.

Roll pin would work if the pump arm wasn't centered in the body, with it being centered it would interfere with the sear on the hammer as it returned to the forward position.

[Chuck E Ducky]

I like how close that Vert ASA is to the grip that’s going to make a nice tight setup. You could probably reduce the size of the pump handle length and width wise. Or maybe just flatten it off like the First Gen CCM T2 those were always super comfortable.

[RAZRBAKK]

Colour me interested.

[alpha_q_up]

This is super neato

[KMDPB]

Very nice! how do you plan on getting that extruded? I'm guessing an extrusion die for a custom shape cant be cheap.