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Author Topic: Need some insight on PCP  (Read 2808 times))

Offline ZipSnipe

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Need some insight on PCP
« on: April 14, 2012, 03:30:13 AM »
Ok I am trying to wrap my head around PCP air rifles.

Question 1)  PCP use compressed air?

Question 2) I noticed a hand pump is used to fill it. Why not an air compressor?

Question 3) would it be possible to have a semi auto PCP

Thanx for any info!!
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Offline MustangMike

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Re: Need some insight on PCP
« Reply #1 on: April 14, 2012, 04:05:14 AM »
 1) yes but its called hpa high pressure air

2) the hand pumps for pcp's are not ur every day bike tire hand pump. these are 3 stage hpa hand pumps the air is compressed 3x's per stroke of the handle. you can use them air up a tire, they ment and design for pcp use or hand pumping to fill a small tank

3)a high end pcp company called fx has stream lined the semi auto pcp's using a system like a firearm does to rechannel the gas to cock the gun. fx semi auto guns all come in full auto as well.
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Offline rkr

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Re: Need some insight on PCP
« Reply #2 on: April 14, 2012, 07:17:31 AM »
PCPs in general operate at pressures of 200+ bar while your average compressor can only reach 10-12 bar. There are compressors that can do pressures required for PCPs, usually found in diveshops. FX makes semi auto PCPs while Evanix makes full/semi auto PCPs. There are also HPA guns that fire BBs in full auto mode with ROF up to 2000 rpm at 12 fpe, unfortunately they only hold about 800 rounds ;)
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Offline william71743

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Re: Need some insight on PCP
« Reply #3 on: April 14, 2012, 01:38:45 PM »
PCP= Pre Charged Pneumatics (high pressure air) normally above 1000psi
Most air compressors will pump about 90 to 150 psi .  HPA air compressors are available but are kind of pricey, a shoe-box I think about $500.00, so a hand pump is a good starting place .
Welcome to the dark-side (HPA airguns) there is a world of information on here and a great bunch of guys to help so read, ask and have fun !....:)
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Offline ZipSnipe

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Re: Need some insight on PCP
« Reply #4 on: April 14, 2012, 06:53:42 PM »
Thanx for the info.  It amazes me that a hand pump can be that more powerful than an air compressor. But I realize my air compressor will do about 280 psi I think before the air bursts out on of those overflow valves.  So I guess if I want a pcp then the hand pump is the way to go.
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Offline MustangMike

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Re: Need some insight on PCP
« Reply #5 on: April 14, 2012, 07:08:02 PM »
there is a cult like following for the bejamin discovery pcp airgun on this forum.

you can find them for as much as 379.99 w/free shipping and as low as 299.99 from walmart with free site to store shipping just make sure you get the combo rifle and pump. you also need to factor in a tko 6.5 ldc to noise control if you live close to ur neighbores. a disco with a tko is about as loud as a sub sonic 22 long rifle

also in the world of pcp's some guys like their 177's but in order to take full advantage of the power of a pcp rifle 22 cal is i guess the normal caliber every one gets but it is also the largest caliber for the benjamin discovery.

the discovery also has a massive world of aftermarket support. not trying to show but the picture below is my discovery that is heavly modified and is just one of many many routes you can take when you mod ur gun..

the discovery out of the box is single shot, so ive changed over to a multi shot breech that uses the 22cal mrod mags and a full shroud.
  • atx
.25 hatsan at44s-10 (down the road)
.22 disco,  bnm breech & shroud, katana stock, 7" tube extension, leapers 3-12x40AO
.22 ccs 2400kt, extensively modified using the sikes touch.

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Offline rsterne

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Re: Need some insight on PCP
« Reply #6 on: April 14, 2012, 07:10:29 PM »
High Pressure Air compressors are available, but they are either slow (Shoebox ~$500) or expensive (SCUBA, start at about $3000)....

Bob
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Offline Nomadic Pirate

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Re: Need some insight on PCP
« Reply #7 on: April 14, 2012, 07:40:36 PM »
.
« Last Edit: April 14, 2012, 07:42:53 PM by Nomadic Pirate »
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Evanix REX Mini-Carbine      .357  150 FPE  #6.5
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Evanix RainStorm  II            .30  100 FPE  #9.5
Evanix RainStorm  II            .30   85  FPE  #9.3
Evanix Storm Bushgun          .30   70  FPE  #7.0
Evanix MAX-ML                     .25   65  FPE  #10.6
Evanix RainStorm II              .25   55  FPE  #9.0
Evanix Storm II Model 70      .25   28  FPE  #9.9

Offline Nomadic Pirate

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Re: Need some insight on PCP
« Reply #8 on: April 14, 2012, 07:42:13 PM »


3)a high end pcp company called fx has stream lined the semi auto pcp's using a system like a firearm does to rechannel the gas to cock the gun. fx semi auto guns all come in full auto as well.

Incorrect :)

FX only comes in Semi Auto, ....Evanix comes in Semi and Full Auto :) :)
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Evanix REX Carbine             .357  180 FPE  #6.1
Evanix REX Mini-Carbine      .357  150 FPE  #6.5
Evanix REX Mini-Carbine II   .357  150 FPE  #5.1
Evanix RainStorm  II            .30  100 FPE  #9.5
Evanix RainStorm  II            .30   85  FPE  #9.3
Evanix Storm Bushgun          .30   70  FPE  #7.0
Evanix MAX-ML                     .25   65  FPE  #10.6
Evanix RainStorm II              .25   55  FPE  #9.0
Evanix Storm II Model 70      .25   28  FPE  #9.9

Offline ZipSnipe

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Re: Need some insight on PCP
« Reply #9 on: April 14, 2012, 10:39:22 PM »
Great info guys, the reason I was asking is because, I have a Mossberg .22 cal barrel and thought about building a PCP rifle.  I just wanted to understand all the mechanics to it, so I understand what the he ll I am building :-)
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Offline Plekto

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Re: Need some insight on PCP
« Reply #10 on: April 15, 2012, 09:16:29 PM »
While the basics are easy to grasp, building your own PCP rifle for the first time is about as dangerous as building your first rocket or airplane.  I'd really not recommend that you even attempt it and instead just buy a Discovery or similar.  It can be done, but one wrong part or mistake and you've potentially got a bomb in your hands.

Offline MustangMike

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Re: Need some insight on PCP
« Reply #11 on: April 15, 2012, 09:21:06 PM »
a discovery is designed for low pressure usage, having said that tho. a metal tube pressurized to 2000psi is basically a air powered pipe bomb. you ahve to respect hpa and really know what ur doing to take on that project. if you search around people like lloyd, rsterne, gene sc.. they all enjoy building thier own stuff, but they know the safety numbers for each part and always air on the safe side.

if ur wanting a pcp rifle the discovery is by far the perfect entry level pcp rifle.
  • atx
.25 hatsan at44s-10 (down the road)
.22 disco,  bnm breech & shroud, katana stock, 7" tube extension, leapers 3-12x40AO
.22 ccs 2400kt, extensively modified using the sikes touch.

www.airgunlab.com
www.discosrus.net
Cera Kote services: ddgrego---Designsbydink

Offline ZipSnipe

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Re: Need some insight on PCP
« Reply #12 on: April 15, 2012, 09:45:50 PM »
Well I didn't say I was building it tomorrow.  I plan to learn as much as I can.  And I am actually leaning back to just staying with the co2 or just go ahead and build a rim fire.
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