Some Crosman 2100 Intel.

[BGRooster1]

 
                                 

Can you post dimensions and maybe a photo... how far should the metal stick out of the plastic?

  Petey has it figured out to pull out the probe to just past the 2 holes in the bolt . You have it out far enough when you can see through the holes . Pull gently . If you pull it out of the bolt you may have to epoxy it back in .
 
 
 Don't know how I messed up , but was trying to answer someones question

[microsalmo]

Until you can see through the hole cross drilled behind the probe.

[Petey]

Happy to hear the probe mod worked out for ya...  Too easy and best of all , it's free!

Happy Shootin to all!
Petey.

[BigErn]

That's a good looking AM77 Petey. Love the tactical look with the bipod and brake.

[Rex]

I've tried a bunch of scopes on my 2100B with the same results - couldn't get it close enough to my eye.  Tried to install a Leapers offset mount but the rounded top of the dovetails and the flat bottom of the mount just wouldn't mate.  Five minutes with a file and that problem was solved.  I also drilled a 3/8" hole for the mount's locking pin.  With a Leapers 4x32AO scope I now have a fantastically solid scope that sits perfectly for me.  Not too surprisingly, grouping just got tighter.

[MarkA]

I just got the AirMaster 77 3 or 4 days ago. I really love this gun. I didn't have too much luck with the open sights because it seemed that the  truglo sights covered the target I was shooting at. I mounted the 4x20 scope: (I know a lot of people don't like it), and after sighthing it in, I can hit anything I aim at at about 25 yards. This is a great little gun and it seems to have plenty of power.

Mark

[BigErn]

I just got the AirMaster 77 3 or 4 days ago. I really love this gun. I didn't have too much luck with the open sights because it seemed that the  truglo sights covered the target I was shooting at. I mounted the 4x20 scope: (I know a lot of people don't like it), and after sighthing it in, I can hit anything I aim at at about 25 yards. This is a great little gun and it seems to have plenty of power.

Mark

Very cool that you love the gun. They are truly great pumpers. Nothing wrong with that 4x20 scope. I like them once they are dialed in.

[Petey]

I just got the AirMaster 77 3 or 4 days ago. I really love this gun. I didn't have too much luck with the open sights because it seemed that the  truglo sights covered the target I was shooting at. I mounted the 4x20 scope: (I know a lot of people don't like it), and after sighthing it in, I can hit anything I aim at at about 25 yards. This is a great little gun and it seems to have plenty of power.

Mark

Congrats on the pumper!
Happy Shootin to ya !
Petey

[MarkA]

Thanks Ernesto and Pete.

Mark

[TEE]

i thought that maybe instead of working the trigger to make it break quickly and smoothly, after the lube tune (lithium grease on contact points after polishing contact surfaces) i could drill and tap a small allen screw to the top of the trigger blade, where it has a straight face, and use the allen screw to make it stop earlier on the rest position, so it never sits fully open. that limits travel and is adjustable to put it as close to sear engagement as possible. It is a project i have been looking into finishing; then the trigger should be much better. at least theoretically.

I've found that it is much easier to drill and tap the pump tube.  You will need to put a grove into the bottom of the hammer spring guide but that's spit easy.  It works great. 

[westgl]

I did most of the same mods here, and a few of my own.

I opened up the ports on the Barrel and breech to match the size on the Valve body, Valve body port size is larger than both of these other two ports.

I did not do the bolt extension as i do not completely understand what i am suppose to do here, But I did something a little different here.

To extend the bolt further into the breech, i filed on the back side of the breech block body, so when the pellet is load the the bolt is closed it goes further forward, this allows the bolt to be brought farther forward just to the point that the pellet skirt is all the way past the port.

Trigger job, i polished all mating surfaces, Then went to Local Ace hardware and took the Very Stiff  oem spring with me, and bought another spring < $1.00, that has 1/4 or maybe less spring pressure than that of stock spring, this made a big difference in the trigger pull, and is much better. I do not have a trigger pull gauge but it has a lot lighter pull.

Trigger has a space between the Sear & Trigger, there is a lot of slop here,  this is why this gun has a longer than should be trigger pull.

I wanted to reduce/eliminate the pre-travel/Sloppy space for More accuracy.

I want to modify my sear & trigger to reduce/eliminate that gap between the two for a very short trigger pull, using a spent 22LR case, should be done hopefully in a few days.

I also will do the longer seal mod between the barrel/breech port using longer than stock seal length, using poly tubing.

also will angle exhaust port in valve (ala 22xx & 17xx mod) for quicker smoother air flow out of valve & may enlarge valve volume size while in there.

May go with a stiffer hammer spring, for quicker valve dump.

I also wanted to while apart, degrease & Debur pump tube, & relube with light amount of moly 60 grease, to smooth action, & lightly polish hammer/striker

They are fun to work on.

I dont have a chrony, wish i did may end up getting one before to long.

[lillysdad621]

The only tool you truly need... the chrony. without it your efforts are in vain (unless you find a way to bring squirrels back to life so they can describe how they were hit and how hard...lol)