Crosman Challenger 2009, Can It Be Modded For 800 - 900 fps?

Just poped back in this thread after looking at sme old pictures, the modded 12fpe rig I tried out had the finger pull latch on the t-handle . Not sure which model exactly that part came off of but it was all plug & play crosman.





John



You mean a mechanical catch like on an AR 15? Something like that may be the ticket to locking the bolt on this gun. It would require a little machine work but shouldn't be overly difficult. Just machine a slot in the T-handle for a larger version of the AR 15 catch and a corresponding slot in the side of the receiver. Another possibility would be a standard AR catch on both sides. At that point you could fix the bolt to the T-handle and be done with the BBs. All plug and play crosman? As in factory parts? Now we have a search to fine out what gun has these parts. It will be dated from the beginning of the Discovery production since this gun and the mystery gun are Discovery based.

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John

I don't know, that might be it. I looked around on the Crossman/Benji site at various parts schematics and didnt stumble across anything. I got a RWS 34 in 96 but was not anything but a casual urban tree rat blaster until I discovered Teds old you tube page and got a proper Marauder in .25 with a carbon bottle air supply. I have a very limited knowledge of Crossman/Benji guns. A variety of set backs have chilled my expenditures on toys. So Im all happy dickering about on my new to me free pcp airgun. I will have to see which model number Crossman uses to describe the 2000. My Marauder is a BP2563. I got to thinking an AR charging handle latch with a little bit stronger spring could well grip into a simple hole drilled into the rear of the Challenger receiver. It should hold very well until the aluminum receiver began to wear, if it ever did? That could be mitigated by drilling out and installing a bushing or a shortened steel set screw for a steel on steel hookup. A double latch could be used but a slightly larger than stock AR type latch, and doing away with the BBs, is the best idea to date. I still wonder if a couple of O-rings to back up the infamous BBs would work. On that one my thoughts were the initial friction would be enough to allow the BBs to hold the rest. I still think the mechanical lock up is the way to go.

Thanks john. If forced to bet it would be on your idea but its going to be a lot of Dremel work and hand fitting. When I get around to trying something that actually works I'll send picks. Got to get a supply of BBs and might try the O-ring rig first just to avoid milling and drilling where it can be seen and see what happens. From what I see here getting rid of the BB setup is the way to go. If I go with the latching mechanism I think making a larger AR type latch that would grip into a simple hole drilled into the rear of the receiver with a fairly stout spring to hold the latch closed is the safest bet and would allow doing away with the BBs. Considering the CH 2000 is a CO2 gun is the reasoning why Im thinking about a single larger hook or possibly twin AR parts to hold the added pressure.

Coldair the project got side lined due to health and employment issues, cancer sucks. Im back on it and looks like using the stock T handle its going to max out at 12 or so foot pounds. Im going with a slightly larger transfer port like you suggested and a Discovery hammer spring. The long range plan is to find a used 177 Discovery and cannibalize the tube, valve, and receiver assembly etc. and install on the Challenger. Best of both worlds. Then consider a power tune a bit above a standard Discovery. Thanks again for your comments and help. 

Anyone reading this probably could use a link to how to work on the dreaded T Handle Bolt on these guns.

Probably so if everything would line up. Its been a few years since I seriously looked at really amping up the power and I seem to remember the main tube being different between the Discovery and Challenger in the position of the port where air goes from the valve to the breech or something to that effect. I just decided to bore out the transfer port to 80 thousands for now and let that be good enough. Others have said that will give me 700 fps with 10.3s. I want to retain the use of the .177 bbl. as its a twelve grove LW and known for being very accurate. I just got some H&N field target trophy 8.6s in to try. I have thought of some type of mechanical latch using the bottom of a scope base attached to the receiver with an arm going back and into a hole drilled in the T handle to hold it closed against the higher pressure. I would have to open up the valve body or possibly use some Discovery valve parts to get it up to around 18 ft. lbs. or so.