WE Open Bolt SCAR DMR Range Test (FAIL!)

[Fox62]

So, I've finally managed to range test this thing. While the new VN Style mags gave me great FPS (570 with .36, a bit over 500 on .2), the hop up doesn't seem to be doing any effect, and I find myself having to shoot real high, being able to semi-accurately shoot at almost 200 feet (which is quite short from the 240 I wanted to reach) The BB can definitely make it further, but the hop up isn't elevating it as it should. I think the Green/Red Gas is to blame, as it's lubricated, and the oil will obviously go into the bucking, making the BB slide, and lessening the effect of the hop up.

I posted a couple of pictures a while ago, the specs are as follows:
WE Open Bolt SCAR, Ra-Tech 440mm/6.01 Precision Inner, Falcon 80 Degree Bucking. And that's pretty much it as for internals in regards to precision.

I'll repost one of the pictures for those who haven't seen it so you know what the gun's running externally at the moment.



So, what do you guys think? It's really not going much further than decent Assault AEGs at the moment, so I really would like those extra 50 feet to make safer and more accurate shots at 200 feet. Is the oil theory feasible, or just a desperate attempt to find an explanation?


Fox.

[Ross]

It's the hop up. It needs to be dry. Use a q-tip or a cotton rag and dry it out. A freshly oiled mag will keep the hop up from working properly for about 100 shots I found. The hop up needs to be dry as a bone. The accuracy and range should greatly improve. But it will never beat an aeg for consistency in groupings.

[Kimbo]

IMO, don't use a GBB if you want to build up and accurate gun.

Using propane may help with keeping your hop up dry.

You'll need a pretty robust hop up to hop something shooting 570 with .36's. holy!

[Ross]

I dialed the fps down to 420 (on .20) with the npas, and then used propane with .28 bbs. I got man sized groupings at 200-240 feet away. It out-ranged my friend's 400 fps M4 by about 40 feet. Maybe every 10th shot would fly off in a completely random direction when the hop up kicked in.
If I arced my shots it would go over 300 feet but I probably would just barely hit a broad side of a barn.

[Fox62]

Originally Posted by Kimbo

You'll need a pretty robust hop up to hop something shooting 570 with .36's. holy!

570 with .36s means that it would be 570 if they were .20s, remember heavier BBs vary the FPS on gas guns. It does not mean it chronoes 570 using .36s, it chronos the equivalent in Joules to 570 FPS on .20s.


Fox.

[Fox62]

Originally Posted by Ross

I dialed the fps down to 420 (on .20) with the npas, and then used propane with .28 bbs. I got man sized groupings at 200-240 feet away. It out-ranged my friend's 400 fps M4 by about 40 feet. Maybe every 10th shot would fly off in a completely random direction when the hop up kicked in.
If I arced my shots it would go over 300 feet but I probably would just barely hit a broad side of a barn.

I take it you shoot with propane?
I'm still very happy with the performance if the oil's the problem, because otherwise, the gun's very reliable and shoots precise at shorter distances, so with a functional hop up it should be very decent.


Fox.

[Ballcancer]

Yea definitly use strait propane if you want accurate range shots.. I wouldn't waste my mOney on green gas or any pre oiled gas.. Iv recently switched my WE m4 to open bolt as well and I find there is no need to add an extra drop of oil for every mag.. I just tear my gun down after every use and clean and oil/lube all the moving parts .. I keep the mags oil free for everyone of my gas guns (except for a closed bolt system.. You have no choice there) ... Also Ross where did you pick up that NPAS for we open bolt?

[oicurpn]

I have a ra-tech we m14 ebr and use propylene it has a higher psi and is very dry I still put a drop of oil for every mag this shoots very nicely with .40 I dialed down my npas as well but am very accurate past 250-300

[Ballcancer]

Where can i get a npas kit for we open bolt i cant seem to find one..?

[mas_oyama]

I'm sorry about the language but... this gun looks FUCKING badass!!! :P

Hope you can get that thing accurate!

[Ross]

Originally Posted by Ballcancer

Where can i get a npas kit for we open bolt i cant seem to find one..?

The open bolt npas for the scar, is the same one for the we m14. I do not know if it's the same for the m4. But I assume it should work.
I got my we m14 npas from ra-tech. But you can get it on many retailer's websites.

[Fuzzy]

Originally Posted by Ballcancer

Yea definitly use strait propane if you want accurate range shots.. I wouldn't waste my mOney on green gas or any pre oiled gas.. Iv recently switched my WE m4 to open bolt as well and I find there is no need to add an extra drop of oil for every mag.. I just tear my gun down after every use and clean and oil/lube all the moving parts .. I keep the mags oil free for everyone of my gas guns (except for a closed bolt system.. You have no choice there) ... Also Ross where did you pick up that NPAS for we open bolt?

If you don't add oil to your mags wouldnt the o-ring at the back of the bolt dry out? I used to fire oil free mags until the bolt jammed solid in the bolt carrier.

[Fox62]

Originally Posted by Fuzzy

If you don't add oil to your mags wouldnt the o-ring at the back of the bolt dry out? I used to fire oil free mags until the bolt jammed solid in the bolt carrier.

But you still can (and should!) grease the internals of your gun, as long as you make sure the grease isn't getting to your bucking. Also, the idea is to manually oil the o-rings after each game, that way they won't dry out.


Fox.

[Fuzzy]

My problem was that the oring would dry out during a game. I had lubed the oring before the game with grenade oil. I had tried lithium, moly and silicone grease before but none seem to keep the oring lubed long enough. I chose to use grenade oil because it was the easiest to relube the bolt without dissembling it.

Sorry to the OP for hijacking the thread.

[Basic-Wedge]

Originally Posted by Fox62

So, I've finally managed to range test this thing. While the new VN Style mags gave me great FPS (570 with .36, a bit over 500 on .2)

That can't be right. The AirsoftApp on my iPod converts that to the equivalent of 765 fps with a .20 BB.

Regardless of the velocity your SCAR is giving you, it is a damned fine look instrument.