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Alan Alford's build

2250b Tube for later move to bulk CO2.
12" .22 Caliber Barrel from Doomsday Backpacker
Brian & Assoc. Alluminum Breech with 2 barrel screws
Original site rear
Pin site on Custom Mt. Airguns Muzzle Break
2x1 Centerpoint Scope with UTG dovetail adapters
Mountain Airguns Custom Bolt and Handle
Mountain Airguns Custom Power Adapter and spring guide
B&A Boss Valve for extra Power

Built mainly for fun and to shoot at local Field Trial Pistol Match.

It currently it shoots a 14.3 Crosman Hunting Pellet at about 530 fps in a 72 degree room for 8.92 FPE.



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My SSP, I got rid of the delrin spacer that I had between the piston and valve,

July 10 2012 at 5:22 AM
james perotti  (Login jpsaxnc)
Crosman Forum Member
from IP address 71.76.157.166

(it was causing problems),by making the piston rod longer and drilling an air intake hole in the tube. I had noticed that my piston o-ring looked pretty abraded and looking through the back of the compression tube I could see a very rough spot in the tube (manufacturing defect),the last 2-3" of piston stroke, so I've been grinding it smooth. One thing I noticed on this build is that the alignment of the link, piston rod and piston are critical. The piston rod is 5/16" dia. and does not flex. Hopefully I'll have some more results in a couple days.

 
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