OzNerf-Sarge

If you're running an HPA rig, a portable air compressor.

Something tells me you don't run an HPA rig, because I've been running one for the last year-and-a-bit and still have never needed more than one bottle for a full day.

Only bumping this because I have made some edits pertaining to parts in the writeup itself, as well as mentioning chronographed figures for these breeches in the introduction. Also, people have been saying on Facebook that they can't see the pictures????

By that I would mean a standard sleeper breech barrel compared to a foot long brass barrel of the same method. Sorry if I had confused you.

There is no "standard" length barrel. Each breech is cut to the length that most appropriately suits the spring force behind it. I've found that there's little difference between a Sleeper breech with 14kg and a near-perfect seal with a "faux barrel" length brass barrel, to a full foot of brass inside another 14kg Hybrid Sleeper breech. That is to say, both are hitting around the 200fps mark with FVJ darts (the Australian dart of choice).

You mention some people having to limit the FPS to 220...what's the max that you can get out of one of these? Any mods to the plunger/seal to achieve that?

 

What springs and darts have you seen give the best results?

I run up to a 14kg spring included in the Hobby Mods kit, and 220 is (coincidentally) some of the best velocities I've seen out of this breech with a near-perfect seal and the full foot of 17/32" brass barrel. Darts used were FVJ's. Elite darts are poo and should be condemned for anything not Superstock.

 

Didn't ACnerfshop do this a few years ago? 

Their design inspired me to tinker with my own designs; however the main empirical difference is that my design can be incorporated into a much "sleepier" fashion as well as "hybridized" with the Hobby Mods Longshot Deluxe kit.

 

This has been made before, and it was called the minimumist longshot breech. You did explain this with more detail, though.

I wish I'd found that writeup before I posted this; that said I think the integration of the Hobby Mods kit warrants its own writeup due to the difference in methodology with assembling it all.

bullshit
post the insides and video proof of 650fps or its an empty shell and youve never made a blaster to shoot more than stock

I'm not the creator; I'm just one of 6 that own one. I went into a gentleman's agreement NOT to post internal pics, but I can safely say it's just 2 QEV's and a 3 way 2 position mechanical valve. I don't see why that warrants a write up. Like Zorn said, anyone can put together a bunch of high rated fittings and become OP.

HERE'S A CHRONY SHOT THOUGH. I would do a video but I don't have the Chrony at the moment. This pic was taken ages back.