That setup in the photo looks like it would end up being ported, that about a 15” barrel. All the other V2.5 manufacturers use full cylinders on the 20” barrels and ported with the shorter barrels
Another new DMR that will most definitely not arrive in our country, E&C 417
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The A&K, CYMA, and Classic Army SR25/M110’s come with a full cylinder if the replica is equipped with a 20” outer barrel and ~500mm inner barrel.I want a great v2.5 with full cylinder ootb and I went so low as to wishing novritsch would release one
The A&K is lower priced model but it doesn’t have a QuickChange Spring Guide system in it, and the internals aren't all that hot. The CYMA’s mosfets seem to have a problem with 11.1v’s and can go bad, seems people are using PerunHybrids if they fry, but the rest of the internals are pretty good. The Classic Army SASS has, hands down, the best mosfet/trigger unit, it has a bore up setup (in addition to being a V2.5), the motor is a bit weak, and a 24mm nozzle is needed to replace the 23mm if using any other hopup bucking than the factory one (ask me how I know).
I usually recommend the CYMA because its more available than the Classic Army (pretty sure the SASS models are unicorns these days). If CYMA would up the game on the mosfet and microswitch, it would be a total knockout.
Well, I just worked on my pal’s full-length CYMA SR25, and I was (unpleasantly) surprised to find out that it was equipped with a ported cylinder (kind of self-defeating) , so apparently the only models that now have full V2.5 cylinders are Classic Army’s M110 SASS, and A&K full-length SR25.I prefer carbine length DMR of cyma but is currently out of stock.
Well, I just worked on my pal’s full-length CYMA SR25, and I was (unpleasantly) surprised to find out that it was equipped with a ported cylinder (kind of self-defeating) , so apparently the only models that now have full V2.5 cylinders are Classic Army’s M110 SASS, and A&K full-length SR25.
Now there are some fields that require a full length barrel (~20”) , even for 7.62mm x51/54mm platforms for DMR allowed platforms, so make sure that its kosher.
If you can find a Classic Army M110 SASS (AR014M), I would go with that over a CYMA; the ECS trigger unit is more robust, it has the bore-up, and the lower receiver has a physical blockoff that is easily used with some JB Weld/epoxy to fill in the notch hole on the selector switch.Curious that it has a bore up cyllinder stock, I have been debating the classic army versus the Cyma for a while now for a DMR build. I just know with the cyma I have to replace the mosfet and that the cyma V2.5 gearbox shell is more properitary.
The “have to” changes would be the motor and to change the nozzle from a 23mm to a 24mm, to use normal style hop up buckings.
Most 15-16” outer barrel SR25/M110 replicas are using ~363mm inner barrels.Unless you have a carbine 417 you barely have the issue of over voluming on v2.5 equiped replicas. They often have a minimal barrel lenght of 400 mm.
Not exactly sure what advantage that you are talking about, I know of some though.Porting has its own advantage, even more so in an overvolumed system, in which a short barreled V2.5 experienced. But indeed it's weird to port on a full length V2.5
Please clarify your point.
I think the rule is as such due to “faithfully recreate” the actual replica; ie. one is going to be hard pressed for find a carbine length SR25/M110/M14 EBR/SVD/ etc being used in a DMR role.That's an interesting rule. I wrote up the DMR rules for Ballahack, and I went for a 16" minimum barrel length requirement. I recall doing that to open up more replica options so the DMR class would be more frequently utilized, but I can't recall what specific replicas I had in mind. I wonder why the fields in question went for 20" instead.
Totally understand doing the caliber restriction, though. It's easy for the chrono marshal to figure out what makes a qualified DMR based on mag type.
Probably also to make it less maneuverable and more cumbersome.
A&K and Classic Army have pretty much always used less than a 400mm inner barrel on its CA25 carbines…..From taiwans site this version of the HK417 has a 270 mm inner barrel. So yeh will be overvolumed. For 16 inch barrels I would expect around 400mm inner barrels like the cyma and the classic army have.
Classic Army M110 LS12 Airsoft AEG Rifle w/ M-LOK Handguard (Color: Black)
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Wow, thats the first V2.5 that I have seen with that short of an inner barrel! Not to say that the setup isn’t valid, or anything. I am figuring on going down to a 363mm or 300mm with my M110 SASS to support some really heavy stuff.From taiwans site this version of the HK417 has a 270 mm inner barrel. So yeh will be overvolumed. For 16 inch barrels I would expect around 400mm inner barrels like the cyma and the classic army have.
Partly true if you are using lighter bbs with short barrel and a weak spring.
What you are speaking to will benefit the joule output of a lightweight bb, but it wont make it gain range more than the same BB, with same barrel/hopup setup in any other replica that is outputting that amount of joules with that BB.I can't say much lest I gave wrong information since that topic is still beyond my understanding. But the basic is that since the compression area lays a few while after the piston moves, it gave the piston faster speed before it starts compressing air for real, giving us higher pressure spike. It supposedly helps us gain range in limited power build.
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