More Crosman 2240/2250 Picatinny Options and Modularity

Really hadn't planned on blogging this little project, but it turned out to be pretty slick.  

Found and purchased a 3D printed picatinny rail on eBay from a seller called "ezapper".  It was made to fit most of the Crosman 22XX type guns.  Slides over the barrel and gas tube and allows for attaching things like sights, lasers, lights, hand stops, forward grips, a bipod...whatever.  It was printed with a PLA + resin which promises to be substantially stronger than the "normal" PLA print material.

The part is made for a Crosman 2240 with the stock plastic breech or a Crosman 2250/2260 with plastic or steel breech.  It WILL NOT FIT a 2240 with a steel breech without modification--the steel breech extends too far forward for this to fit--unless you shorten the shroud.

Apologies.  As I wasn't going to blog this, I failed to take the "BEFORE" images of the part as I received it.  It was kinda shiny and had very fine print lines  Wasn't quite a match to the plastic Crosman breech or grips--close, but not quite.  The print quality was very good.

Remembering my goal, "Make Things That Don't Look Like I Was Involved", I threw the 3D part along with a set of stock Crosman black plastic grips into the media blasting cabinet at work.  This worked perfectly for all the nooks and crannies of the picatinny slots.

Sorry, it's bit blurry.  Here's the 3D printed picatinny rail shroud after glass bead:

 

 

 

 

 

 

 

 

 

Installed four #8-32 set screws into the shroud.  Holes were already molded in.  Didn't bother to tap first, just ran the set screws home. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The media blasting blended and matted out the finish and removed--or at least softened--the print lines.

 

 

The Crosman grips turned a dead flat and uniform gray color.  Then sprayed everything with a healthy coating of WD-40 oil and wiped off the excess.   Back to black.

Blasted and oiled on the left.   Blasted, no oil yet on the right.   The oiled finish is a close match to a Magpul magazine.   If I don't oil the parts after blasting, the dry matte finish will show every single bit of oil from my fingertips.  I've oiled the finish so it doesn't show oil from handling. 

For fun, I installed this on a Crosman 2250 length tube and Crosman long steel breech along with a black Magpul RVG. 

While I was at it, made another AR stock adapter  that accepts my modified AR buffer tubes.

Since this is version 3 or 4 of the adapter, I added a rear facing QD socket...

 

...for a single-point sling.

So, yeah.  Options.

Option #1   Go short with a single point.

Option #2  Go longerish with a Magpul (or any Mil-Spec AR) stock.

Ended up bead blasting and oiling most of my other Crosman black plastic grips/forearms over the next few days.  Think it's a good look.

I've kinda got a themed group of Crosman airguns now:

Un  Single Shot

Deux Multi-Shot

Trois --this one

1377--What?  here:

 

Like all my projects--a work in progress.

More soon.

Modifying a Vintage Hand Stop for the TF79

Bought this hand stop off the Yellow Classifieds last month.  It's exactly what I was after to add to the modified Tech Force 79 rifle.  Thanks again, Jeff!
















It's in nice shape, probably 25 years old or so.  It will fit the Anschutz-sized accessory rail I added to the forend. 

Unsure as to brand.  It's old enough to be an Uncle Mike's or it could be from Champion's Choice or even Freeland.

The 1-1/4" sling swivel comes off with the push of the button. 

Thought I'd clean it up then make a new aluminum locking nut with a handle so I don't need a separate tool to adjust position.

Started with a piece of scotchbrite to polish it up.

The green felt wasn't in bad shape, but I thought I'd change to a new piece.

To cut the felt, I first found a piece of thin brass tubing that just fit over the bolt.  Beveled one end to make a punch.

A local craft store sold various colors of adhesive backed felt.  Went nuts and bought black.  The piece was 12X12" for eighty-eight cents. 

Cut out a piece and figured out where to punch the hole.


 

One good smack with a mallet...

and the brass tube works like a cookie cutter.

Centered the hole and traced the outline of the stop.

Like a first grade project without the safety scissors.

For the new nut, I found a piece of 1" hex aluminum in the scrap box.  It's even pre-drilled with a 0.500" hole in the center from a previous project. 

The bolt was threaded 9/16"-18 (so I guess it's not an Anschutz hand stop or it would be a metric thread).  Used the lathe for thread alignment and turned the headstock by hand to start the thread.

Parted off the excess.

A small lip to seat in the counterbore of the hand stop.

Turned down a portion of the outside diameter.

Flipped and beveled the edge of the nut.


 

Going to supplement the felt's adhesive backing with a more aggressive glue.  This is designed to hold tubular tires to special high-end bicycle rims for racing.

Thin coat and let it tack.

The nut still needs a small tommy bar for a handle.

3/16"

Changed to a flat-bottomed bit to finish the hole.

Cut a piece of 3/16" drill rod and faced the ends.

Rounded one end with a file.

Heat blued the handle then some epoxy (J-B Weld) and pressure to fit.

Done.  A full-sized hand stop for the gun.

Check back in a few days.  Not sure what's up next.