Air Gun Home :: View topic - Newest 1077 bulk feed adapter, sort-of.

AirGunEric · Site Admin

I've had the pieces laying around for months (years?) to bulk-feed a Crosman 1077- just never had time to get it done.

So, what we have here is a hack-job of a bulk-feed adapter for using paintball tanks with the 1077.

What tools does one need? A drill press w/vice, saw, workbench vise, grinding wheel, 7/16-20 LH tap, M8-1 tap and appropriate drillbits and wrenches to connect the bits.

Here's what I started with- Crosman AirSource adapter and 1" aluminum rod:

Next, I cut the rod to a 2 1/4" length, drilled and tapped it to hold the fittings:

Then, took apart the reverse-threaded AS adapter from Crosman to use the feed tube assembly and inserted it (with some teflon tape- perhaps Loctite will need to be used instead) into the aluminum adapter and installed the paintball hose fitting (came with the hose):

Next, install hose:

Then, install on 1077:

Unfortunately, I do not have a paintball tank to hook up right now and test it, but I'm thinking Loctite may do a better job keeping the fittings in place and not leaking under the Co2 pressure.

The reason I did this? The Crosman AirSource Adapter and a full AS cartridge weighs well over a kilogram and a half (3.3lbs) and forces you to hold the gun by the AS cartridge because the forearm is half covered by it. The new "bulk" adapter w/hose weighs right around a kilogram and allows the rifle to be held properly by the forearm.

And- shaddup about my crooked hole causing the adapter to be a bit askew- I had a drill press and some hand taps and nothing else to do this with (I'm not an artisan, obviously). Mr. Green

yourdaddyjoe · Supporting Member

I won't say a word... I threaded a ASA adapter today and it is crooooooked... Not too bad but... I know it's there...

See
http://airgunhome.com/agforum/viewtopic.php?t=1730

I have the parts to do the bulk on my 1077 but I am using a drop forward for a paintball gun to move the tank up so I can use the stock properly.

I have to make the bracket to attach it to the barrel. I decided that over the stock is a good place for the tank but.... lots of microline to get the Co2 to the dummy... so I decided on the drop forward...

Alstone · Moderator & Site Supporter

Nice solution there Eric, once you've put a crooked thread in a part then explain that it helps with the gas flow, and that’s what makes the difference between your idea and others. Smile

It's harder to come up with a solution to a problem just using what you have got, but very satisfying. Anybody can go out and buy ready made parts but where’s the fun in that. Thumb Up!

Al

AirH3Ad · New Member

...giving me ideas- mine hasn't arrived as of this writing, but I have been planning for a little while how to get all this together. Thanks for the images Smile

AirGunEric · Site Admin

One thing to note on this "specialty" adapter- the teflon tape show in the pictures didn't seal the connections. Locktite medium-strength "blue" did a fine job sealing it, however.

yourdaddyjoe · Supporting Member

When in doubt.... Duct Tape!

AirH3Ad · New Member

I have a number of decent tools to handle this including a small hatchet and a large club. Hopefully I can remember how to use them. Oh, and I have some loctite...

yourdaddyjoe · Supporting Member

I recently added a 2lb. sledge hammer to my colection...

That might straighten it out for you Eric Mr. Green

AirGunEric · Site Admin

When in doubt, break out the BFH. Often this works in surprisingly destructive ways!

yourdaddyjoe · Supporting Member