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The Master Class Kit
For Crosman 2240 2250 1322 1377 P1322 P1377

I have designed the Master Class Kit to include the most sought after upgrades on both the CO2 guns and the Pumper guns. This is the kit to buy if you want to quickly and easily upgrade a bone-stock Crosman to an accurate, powerful pellet gun.

The kit includes:

On the CO2 guns, you will receive the Power Pack Plus as the power mods. That's the power valve, power spring, bored out bushing.

On the pumper guns, you'll receive the Flat Man's Kit, which is the Flat Top Valve / Piston, power spring, bored out bushing.

And a longer barrel of your choice, up to 24".

Two Stage Trigger and Power Pack Plus (CO2 tubes)

Flat Man's Pack (pumper tubes) and Steel Breech Kit (both calibers available)

24 inch barrel for reference and fiber optic sight

The Master Class Kit

Gun Type


Barrel Length

Hidden Screw Steel Breech Upgrade
(2240 / 2250 Only)

Metal Band Upgrade (pumpers only)

Steel Breech 3-Screw Mod Upgrade

Flat Man's Pack Brass Piston Upgrade (pumpers only)

Stainless Steel Bolt Upgrade


Add Milled Plastic Rear Sight

Or, Add LPA MIM Rear Sight