Most of us veterans have encountered this issue at some point or another. In the VSR system (and most bolties), the cylinder is designed so that the spring guide stopper always rubs against the cylinder on the pull. This inevitably leads to a scratchy pull, debris in the cylinder, and damage to the rifle. In examining this, and comparing it to the SRS and AEG systems, I decided to test a mod to make it more cylinder to these other longer lasting platforms.
I took a laylax cylinder and machined the slot to be 12mm wide. This is an extreme increase in width, and has some interesting results. Because of the way the bolt handle works on the VSR, the cylinder never rotates enough to allow the SGS to touch the walls of the cylinder. All cylinder-SGS wear and scratches have been completely eliminated.
I just did the mod so I can't attest for it's longevity, but I can say it feels much better, and a few preliminary shots have shown it to scratch less over time.
One important thing to note is that I tested this mod with two different pistons: a laylax piston, and a Masada piston. After doing the mod, I got a substantial decrease in FPS from the laylax piston, but no change from the Masada piston. I believe this to be the streamlined shape of the Masada piston, as well as the cup seal, to not catch on the new very large ledge, while the laylax may hit it and slow down. There is also a change that it takes longer for the laylax o-ring seal to seal in the upper chamber, but the masada cup seals immediately.
Currently getting 3.12 joules, +-1fps on .48g bbs with an Rapax RMS 3+ spring.
Cylinder confirguration is a laylax cylinder with laylax sorbos, an angel custom head, masada piston and modified silverback spring guide.
Hopup configuration is an airsoft philosopher barrel and chamber, with a modify sora bucking and rhop.
Receiver is a VSR-U with a custom teflon/delrin cylinder sleeve.
Pics: (ignore the bearing near the bolt handle. I was testing something else originally and it didn't work)
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I took a laylax cylinder and machined the slot to be 12mm wide. This is an extreme increase in width, and has some interesting results. Because of the way the bolt handle works on the VSR, the cylinder never rotates enough to allow the SGS to touch the walls of the cylinder. All cylinder-SGS wear and scratches have been completely eliminated.
I just did the mod so I can't attest for it's longevity, but I can say it feels much better, and a few preliminary shots have shown it to scratch less over time.
One important thing to note is that I tested this mod with two different pistons: a laylax piston, and a Masada piston. After doing the mod, I got a substantial decrease in FPS from the laylax piston, but no change from the Masada piston. I believe this to be the streamlined shape of the Masada piston, as well as the cup seal, to not catch on the new very large ledge, while the laylax may hit it and slow down. There is also a change that it takes longer for the laylax o-ring seal to seal in the upper chamber, but the masada cup seals immediately.
Currently getting 3.12 joules, +-1fps on .48g bbs with an Rapax RMS 3+ spring.
Cylinder confirguration is a laylax cylinder with laylax sorbos, an angel custom head, masada piston and modified silverback spring guide.
Hopup configuration is an airsoft philosopher barrel and chamber, with a modify sora bucking and rhop.
Receiver is a VSR-U with a custom teflon/delrin cylinder sleeve.
Pics: (ignore the bearing near the bolt handle. I was testing something else originally and it didn't work)
