GAUGE ASSEMBLY PARTS - select parts individually

$11.00

 These are upgrade gauge parts for Discovery, Maximus and custom PCP builds. The gauge can be mounted directly into the wide-bore port if a low profile is desired. The extension allows the gauge to sit at the correct height for the stocks on Discovery and Maximus models.  

 The WIDE-BORE GAUGE PORT has a much larger air passage than the Discovery and Maximus ports do. It produces more power when used in those models. It also takes up less space in the tube allowing more room for air. The difference in inside diameter compared to the Discovery and Maximus gauge ports is compared in the last photo. It is made of brass with a black oxide coating for extra corrosion resistance. It includes upgrade 90D o-rings. The o-rings for this port are thicker than the ones on the Discovery port. They are the same size as the o-rings on the Maximus valve. This port does not seal against the extension or gauge with an o-ring, thread sealing tape or high-pressure sealant should be used. Extra o-rings are available in the UPGRADE O-RINGS listing.

 The HEAVY-DUTY GAUGE EXTENSION is made of high-strength stainless steel and is rated for operating pressures up to 6500 PSI. It is far stronger than it would ever need to be and extremely corrosion resistant.

 The 3500 PSI GAUGE is standard for 1701P, 1720T, Marauder and Bulldog models. It can be used for 2000 PSI models modified to operate higher pressure.

 The 3000 PSI gauge is easier to read for some and less expensive for those using 3000 PSI or less. 

 The following chrony test results compare a standard Discovery .22 to one modified with a combination of these and other custom parts I offer. 14.3 Grain pellets were used for both tests. Testing was stopped at 100 FPS below peak power. 


Unmodified Discovery .22 starting at 2000 PSI :

1)      888.1   muzzle velocity in FPS (feet per second)
2)      901.0   peak power
3)      899.8
4)      878.8
5)      877.7
6)      871.5
7)      855.6
8)      854.9
9)      849.6
10)    843.0
11)    837.1
12)    836.0
13)    827.6
14)    819..7
15)    813.4
16)    797.1   100+ FPS below peak power

.22 Discovery with custom valve screws, Magnum Adjuster, wide-bore gauge port (or bypass cap), 26" Maximus barrel and a starting pressure of 3200 PSI. 

1)     958.8
2)     965.9
3)     971.2
4)     973.4
5)     977.2
6)     978.9
7)     984.5
8)     991.6
9)     994.7
10)   989.3
11)   997.6
12)   1000
13)   1007
14)   1002
15)   1005
16)   1009   peak power
17)   998.8
18)   1002
19)   990.1
20)   982.7
21)   977.8
22)   965.2
23)   958.3
24)   949.4
25)   938.3
26)   918.7
27)   907.6   100+ FPS below peak power