All Conversions will include thi

Refill your own Airsource tanks
WARNING never attempt to put High Pressure Air into these Cylinders
They will explode causing serious injury or even death.
For CO2 Only

Refillable AirSource Tanks (Tanks ship empty) With these you keep the stock look of your 850, it all fits under the Fore stock. The gauge lets you know when you're running low, before you get POI shift. (Note. A Gauge cannot tell you when your AS tank is at maximum capacity, the tank needs to be weighed to ensure a correct fill) These provide the same shot count as regular AS tanks, around 170 per fill You will require a CO2 adapter to refill AirSource tanks. See my "Fill Adapters" section at the bottom of this page.
Description	Price	Comment

With Pressure Gauge	45.00	If you take 2 of either of these, you get $5.00 off and no extra shipping.
Without Pressure Gauge	35.00
S&H	10.00	For USA (lower 48) only. Mail me for international rates. Second one ships free
Total	55.00	Deduct $10.00 if you don't want a pressure gauge.

Spring Kits

Spring and Guide (Primary use for HPA) Although this spring is very effective, it is a heavy spring and will result in a heavier trigger, however there is a simple trigger Mod available to correct this. The Spring and Guide will do two things: * Prevent valve lock at high temperatures. * Provide a performance boost (more so at higher temperatures) Average .177 Muzzle Velocity at 85°F on CO2: (.22 is approximately 100fps slower) Before: 750fps After: 790fps
Description	Price	Comment

One Upgrade Spring	15.00	This includes a replacement guide. This spring is perfect for both CO2 and HPA.
OR	10.00	For just the spring, you can use your own guide, just cut the base down to half of its standard size.
S&H	0	For USA (lower 48) only. Mail me for international rates
Total	15.00	or $10.00 for the spring only.

High Flow Valve and Adapter

The Hi Flowed valve and Adapter work together: They improve the air flow between the regulator and the breech, providing at least 50fps more to your HPA converted .22 850. (running on regulated 1800psi) Although this mod is mainly for HPA conversions, using the modified valve and spring.does provide a slight performance boost to 850's running on CO2 as well. See figures below. Approximate Average .177 Muzzle Velocity on HPA.. (.22 is approximately 100fps slower) Before: 865fps After: 950fps+ Approximate Average for .177 on CO2 @ 85° F. Stock: 750fps Tune & valve: 800fps Approximate Average for .22 Muzzle Velocity on HPA . Stock: 780fps Tune & valve: 840fps+ Approximate Average for .22 on CO2 @ 85° F. Stock: 645fps Tune & valve: 710fps
Description	Price	Comment

Spring & Guide Kit	10.00	$15.00 if bought separately.
One Valve	46.00	Valve from UMAREX / Deduct if sending your own valve.
One Short B&A Adapter	30.00	Only required for HPA if you're on CO2 you will not need this adapter.
Mod Valve and Adapter	25.00	Flow Mod Both or just the valve (same price)
S&H	7.50	For USA (lower 48) only. Mail me for international rates
Total	118.50

High Pressure Air Conversion Kit.

High Pressure Air Conversion Kit. This is everything you'll need to convert your 850 to HPA NOTE: You will need a scuba fill adapter look at my Fill Adapter section under "Kits and Accessories"
Description	Price	Options	Comment

Spring & Guide Kit	10.00		$15.00 if bought separately.
AS to PB short adapter	30.00
Stock 850 Valve	46.00
Flow Mod valve and adapter	25.00
3000psi 22ci tank plus 1800psi Regulator.	118.00		Check for latest Prices.
Includes detailed instructions.
3000psi 13ci tank Plus 1600psi Regulator.		90.00	I no longer offer the 13ci tank as an option due to the limited shot count and the more pronounced velocity curve. However one can be ordered should you still want one.
Rich from Mich Q		66.00	To keep things neighbourhood friendly
S&H	14.50		For USA (lower 48) only. Mail me for international rates
Total	243.50

Custom Stocks by Steve Corcoran

The AirSource Stock

Please click on the picture for more info.

The HPA Stock

Please click on the picture for more info.

Fill Adapters.

CO2

This is a B&A Adapter that will allow you the following options:
1. Paintball to AirSource.
2. Commercial CO2 to AirSource.
3. Commercial CO2 to Paintball.
PRICE $44.00 Shipped (US / Lower 48)

SCUBA

Scuba (K Valve) to HPA tank. (3500psi)
No tubes or extra connections are needed with this adapter, the fill nipple on the tank connects directly to it, minimizing air loss at bleed off after a fill.
PRICE $50.00 Shipped (US / Lower 48)