Airsoft Canada - View Single Post - TM VSR-10 GSPEC

ThunderCactus · May 21st, 2017, 12:52

You don't need a longer barrel to increase range, but you may need it to increase muzzle energy.
The sole function of a barrel is to accelerate the BB in a straight line. The range comes from the muzzle energy/BB weight/hop up, and the accuracy from BB weight/BB quality/backspin consistency/muzzle energy consistency. Your barrel can only ever reduce range and accuracy by being of poor quality, or bent, or tarnished.
So when you go from a crap barrel to a high quality barrel, it's not that the new barrel added accuracy, it's that it mitigated the loss of accuracy.

Do everything Drakker said. 430-500mm is a good length of barrel for a VSR to get the muzzle energy you need. Too short, and the BB leaves the barrel before the piston hits the cylinder head, wasting energy.
You want a bore in the 6.01 to 6.03 range. You'll get a bit higher muzzle energy with a 6.01, and they are the PDI barrels which are really good, just don't get the "raven" line (they're the cheapo line to compete with angel customs garbage). The tighter bore will foul faster, BUT you shouldn't be shooting the gun enough for that to actually be a problem.

Rhop is a flat hop rubber which is custom fitted to your barrel. It can be done to ANY gun given enough skill. Since you've never attempted it before, I HIGHLY recommend you get someone who knows what they're doing to do it for you. It's just like $45-$60 and makes a big difference in range.

Use high end BBs, there's no sense spending $700 to upgrade your gun then running B-grade BBs through it to save money. Kinda makes the upgrades pointless lol
At 2j, you'll want to be using .36s, not .30s. You'll find the .36s will have a much flatter trajectory out to 300ft.

Airbrake is optional. It's a rod that I install in the end of the piston that blocks the air nozzle before the piston head hits the cylinder head, creating a high pressure air cushion to stop the piston WAY more gently. Done properly, it can make your VSR completely silent from 10ft away (and no I'm not exaggerating, I have actually shot people from 10ft with mine and they didn't know where it came from). HOWEVER, that last little pocket of high pressure is also where you get a significant amount of your muzzle energy. A proper air brake can drop you by a full joule of force, maybe more.
For example, my M24 has a 2.7j spring in it, and only does 1.8j with the air brake in it.
So if you want a ridiculously dead silent bolt action, either get a 600fps spring, or be okay with running at a lower muzzle energy.

May 21st, 2017, 12:52	#6
ThunderCactus Not Eye Safe, Pretty Boy Maximus on the field take his picture! Trader rating Join Date: Feb 2007	You don't need a longer barrel to increase range, but you may need it to increase muzzle energy. The sole function of a barrel is to accelerate the BB in a straight line. The range comes from the muzzle energy/BB weight/hop up, and the accuracy from BB weight/BB quality/backspin consistency/muzzle energy consistency. Your barrel can only ever reduce range and accuracy by being of poor quality, or bent, or tarnished. So when you go from a crap barrel to a high quality barrel, it's not that the new barrel added accuracy, it's that it mitigated the loss of accuracy. Do everything Drakker said. 430-500mm is a good length of barrel for a VSR to get the muzzle energy you need. Too short, and the BB leaves the barrel before the piston hits the cylinder head, wasting energy. You want a bore in the 6.01 to 6.03 range. You'll get a bit higher muzzle energy with a 6.01, and they are the PDI barrels which are really good, just don't get the "raven" line (they're the cheapo line to compete with angel customs garbage). The tighter bore will foul faster, BUT you shouldn't be shooting the gun enough for that to actually be a problem. Rhop is a flat hop rubber which is custom fitted to your barrel. It can be done to ANY gun given enough skill. Since you've never attempted it before, I HIGHLY recommend you get someone who knows what they're doing to do it for you. It's just like $45-$60 and makes a big difference in range. Use high end BBs, there's no sense spending $700 to upgrade your gun then running B-grade BBs through it to save money. Kinda makes the upgrades pointless lol At 2j, you'll want to be using .36s, not .30s. You'll find the .36s will have a much flatter trajectory out to 300ft. Airbrake is optional. It's a rod that I install in the end of the piston that blocks the air nozzle before the piston head hits the cylinder head, creating a high pressure air cushion to stop the piston WAY more gently. Done properly, it can make your VSR completely silent from 10ft away (and no I'm not exaggerating, I have actually shot people from 10ft with mine and they didn't know where it came from). HOWEVER, that last little pocket of high pressure is also where you get a significant amount of your muzzle energy. A proper air brake can drop you by a full joule of force, maybe more. For example, my M24 has a 2.7j spring in it, and only does 1.8j with the air brake in it. So if you want a ridiculously dead silent bolt action, either get a 600fps spring, or be okay with running at a lower muzzle energy.