New to Forum, my Crosman

New to Forum, my Crosman

Joined: March 18th, 2011, 7:52 pm

August 27th, 2012, 8:10 pm #1

I'm new to this forum & thought I'd post up my PC77 carbine build. If you frequent some of the other AG forums, you've probably seen this before.

Aftermarket Parts:
Mellon flat top piston
Mellon flat top valve (ported)
Mellon pivot pin bushing/arm support
Mellon extended probe bolt
Crosman steel breech
Crosman 24" barrel
Crosman 2289 forearm
Crosman 1399 rear stock
Chavka barrel band & pivot pin
Leapers 3-9x40 AO Mildot scope & medium rings
Lead Shed

Modifications:
Custom designed & fabricated 17" reflex-type LDC/shroud
Crowned & threaded barrel (3/8"-16 male)
Second set screw on steel breech
Lighter trigger spring w/aluminum tube guide
Custom Delrin bushing on rear of Mellon bolt to reduce play
Black satin paint on forearm & LDC
Plugged forearm roll pin holes
Custom adjustable Kydex cheek riser
Brutuz-type transfer port seal
Custom carbon fiber rod & steel bolt handle
Chrome trigger shoe
Adjustable Delrin butt-plate
Custom mount for Lead Shed
Custom scope level

Performance
705 fps @ 10 pumps, JSB Exacts (8.44 gr)
1/4" ctc at 26 yards

Thanks for looking - JMJ

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Joined: March 1st, 2002, 12:22 am

August 27th, 2012, 8:18 pm #2


good numbers, looks good!

 


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Proud Sponsor of team_subsonic
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Joined: July 4th, 2012, 7:51 pm

August 27th, 2012, 10:27 pm #3

I'm new to this forum & thought I'd post up my PC77 carbine build. If you frequent some of the other AG forums, you've probably seen this before.

Aftermarket Parts:
Mellon flat top piston
Mellon flat top valve (ported)
Mellon pivot pin bushing/arm support
Mellon extended probe bolt
Crosman steel breech
Crosman 24" barrel
Crosman 2289 forearm
Crosman 1399 rear stock
Chavka barrel band & pivot pin
Leapers 3-9x40 AO Mildot scope & medium rings
Lead Shed

Modifications:
Custom designed & fabricated 17" reflex-type LDC/shroud
Crowned & threaded barrel (3/8"-16 male)
Second set screw on steel breech
Lighter trigger spring w/aluminum tube guide
Custom Delrin bushing on rear of Mellon bolt to reduce play
Black satin paint on forearm & LDC
Plugged forearm roll pin holes
Custom adjustable Kydex cheek riser
Brutuz-type transfer port seal
Custom carbon fiber rod & steel bolt handle
Chrome trigger shoe
Adjustable Delrin butt-plate
Custom mount for Lead Shed
Custom scope level

Performance
705 fps @ 10 pumps, JSB Exacts (8.44 gr)
1/4" ctc at 26 yards

Thanks for looking - JMJ

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.....and a great shooter

Wyo
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Joined: April 28th, 2010, 12:23 am

August 27th, 2012, 11:20 pm #4

I'm new to this forum & thought I'd post up my PC77 carbine build. If you frequent some of the other AG forums, you've probably seen this before.

Aftermarket Parts:
Mellon flat top piston
Mellon flat top valve (ported)
Mellon pivot pin bushing/arm support
Mellon extended probe bolt
Crosman steel breech
Crosman 24" barrel
Crosman 2289 forearm
Crosman 1399 rear stock
Chavka barrel band & pivot pin
Leapers 3-9x40 AO Mildot scope & medium rings
Lead Shed

Modifications:
Custom designed & fabricated 17" reflex-type LDC/shroud
Crowned & threaded barrel (3/8"-16 male)
Second set screw on steel breech
Lighter trigger spring w/aluminum tube guide
Custom Delrin bushing on rear of Mellon bolt to reduce play
Black satin paint on forearm & LDC
Plugged forearm roll pin holes
Custom adjustable Kydex cheek riser
Brutuz-type transfer port seal
Custom carbon fiber rod & steel bolt handle
Chrome trigger shoe
Adjustable Delrin butt-plate
Custom mount for Lead Shed
Custom scope level

Performance
705 fps @ 10 pumps, JSB Exacts (8.44 gr)
1/4" ctc at 26 yards

Thanks for looking - JMJ

[/IMG]

[/IMG]
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Joined: August 13th, 2006, 4:21 pm

August 28th, 2012, 3:11 am #5

I'm new to this forum & thought I'd post up my PC77 carbine build. If you frequent some of the other AG forums, you've probably seen this before.

Aftermarket Parts:
Mellon flat top piston
Mellon flat top valve (ported)
Mellon pivot pin bushing/arm support
Mellon extended probe bolt
Crosman steel breech
Crosman 24" barrel
Crosman 2289 forearm
Crosman 1399 rear stock
Chavka barrel band & pivot pin
Leapers 3-9x40 AO Mildot scope & medium rings
Lead Shed

Modifications:
Custom designed & fabricated 17" reflex-type LDC/shroud
Crowned & threaded barrel (3/8"-16 male)
Second set screw on steel breech
Lighter trigger spring w/aluminum tube guide
Custom Delrin bushing on rear of Mellon bolt to reduce play
Black satin paint on forearm & LDC
Plugged forearm roll pin holes
Custom adjustable Kydex cheek riser
Brutuz-type transfer port seal
Custom carbon fiber rod & steel bolt handle
Chrome trigger shoe
Adjustable Delrin butt-plate
Custom mount for Lead Shed
Custom scope level

Performance
705 fps @ 10 pumps, JSB Exacts (8.44 gr)
1/4" ctc at 26 yards

Thanks for looking - JMJ

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Awesome. Looks really good!!! I'd like to know more about the brutuz transfer port seal and shroud construction. I work at my old machine shop again so a lot of doors have reopened to me airgun wise. Awesome build jealous.
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Joined: March 18th, 2011, 7:52 pm

August 28th, 2012, 1:39 pm #6

The Brutuz "evo" seal mod - info here:

http://www.crosman-air-pistol-owners-fo ... l#msg57327

This is basically a thin seal element between the transfer port and barrel.

The shroud is a reflex-type, similar to the a Daystate Airstream, but it vents backwards along the barrel. The main tube is thinwall seamless aluminum tube, 1" OD, . The rear support is black Delrin, secured to the barrel with a set screw and pressed into the aluminum tube. The front end is 6061 aluminum, light-pressed into the tube and threads securely onto the barrel (3/8-16). I finished it with black satin Krylon.

Also - I modified the mount for the Lead Shed, different than the pix above. The new mount keeps the Lead Shed from getting bumped accidentally and dispensing my precious JSB Exacts onto the ground. The picture below also shows my range/elevation chart for shooting out to 60 yards.

[/IMG]

JMJ
Last edited by JMJinNC on August 28th, 2012, 3:05 pm, edited 1 time in total.
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Joined: August 13th, 2006, 4:21 pm

August 28th, 2012, 4:09 pm #7

That's really cool! I need to sit down once I'm done tinkering with my AG's and figured out a range elevation chart. Thanks for sharing! I haven't been able to see the transfer port yet, waiting on admin approval to view the forum.
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Joined: March 18th, 2011, 7:52 pm

August 28th, 2012, 4:58 pm #8

I use the Chairgun mobil app. You can email the data to yourself for import into a spreadsheet and go from there.

I am set up to shoot JSB Exacts mostly, but can also shoot JSB Heavies and Crosman Destroyers well at shorter known ranges.

RE: the brutuz evo mod; try using an image search in Google - it might yield results.

JMJ
Last edited by JMJinNC on August 28th, 2012, 5:01 pm, edited 1 time in total.
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