DMR Build Help

[Screach]

Hey guys, so I am currently working on a DMR build, what I'm going for is a long range, high powered, semi-auto DMR, with good trigger response. I have assembled a parts list, and was wondering if I should add anything else or change something I already have. The base gun is an A&K SR25 Here's the list:

Prometheus tight bore: 6.03
King Kong Elite mosfet
G&P m170 Devil motor
Guarder PSG-1 sp150 spring
11.4 1300Mah Li-po Battery

Also I have a list of externals, but the only one that really makes a difference is the 20" replacement outer barrel. This would allow for a longer inner barrel. Externals are as follows:

Daniels Defense 20" outer barrel
Magpul PRS Stock
G&P Target Grip
G&P NSW Mock Silencer
Sniper Trigger Guard
Harris Bi-Pod

And in the end It would make the gun look similar to this:

[timmah]

I am going to go out on a limb, and suggest you go the other way. Why not downgrade your gearbox to sub-350fps, and try a Tanio Koba twist barrel? I have one in my m4, last chrono'ed at 329fps, and it reaches 320+ ft (measured on g-maps at SniperzDen). Go with a Madbull Ultimate Hop-up, "H-nub" and a 7.4v lipo, and the rest of the external parts you listed.


Just my .02

[Screach]

Why would I downgrade the gearbox? I mean if im going for range, power and reliability...

[timmah]

you downgrade so that you can use the TK Twist barrels. They wont work on guns shooting over 350fps. Spot on reliable, and much more range than a 400+fps semi-auto will give you. I wouldn't have suggested it as an option, if it didn't work. You can come out to LOW this weekend and shoot a few rounds with my m4 if you have any doubts about how well it works.

EDIT: info on the barrels... http://www.airsoftforum.com/board/lofiv ... 47334.html

[Screach]

Alright i'll look into it, but I most likely will go with the Prometheus.

[Alien_Hunter]

Do they even make TK products anymore?

[code789]

[Switchback]

[Spartanacus]

There are no problems 'overbuilding' an airsoft gun if you build and tune it properly. And this doesn't need to be expensive.

Looking at the link provided shows some pretty extensive explanation for why the Tanio barrels work, except that it's based on the false assumption that the bb bounces around inside the barrel before leaving. If you have a poorly tuned hop-up, it will do this. However, a properly installed hop will cause the bb to ride along the top of the barrel, half slipping, half rolling with the backspin provided by the hop.

The ideal is to have a bb exit the barrel with a rotational axis parallel to the ground. This isn't ballistics, rifling doesn't help when you're trying to get a little piece of plastic to spin backwards.

To actually answer OP's question, your list looks fine. Good choice of barrel. I could go on and on about how long tightbores are worse, not better, but a 6.03 450mm is all you'll need. The externals are purely personal choice. The single most important piece of any build is the hop-up, which you make no reference to. You'll find the most benefit researching that. I recommend the R-hop, although I've heard good things about the J-hop, and while I haven't actually tried it myself yet, I would be concerned about durability with molded silicone rubber.

[code789]

[Spartanacus]

Well, OP asked about his build, not about four-year old gimmick technology supported only by anecdotal 'evidence'.

[Switchback]

[Matt]

[Spartanacus]

[Alien_Hunter]

Yeah if you don't want to run your gun efficiently then you will have crank up the FPS. As a humane airsofter, I used heavier BB's to get range instead of jumping up the FPS just to be a tool with a hot gun. I can too, I have an m140 sitting right next to me.