WETTI/AWSS - M4/SCAR/HK416 - Technical Summary Thread

[m102404]

Cab, I didn't do anything to mine....just made sure the o-ring was there and screwed it in tight.

[caboose36]

Hmm... Well I put the fill valve in, and it does work properly. The main reason why I was asking was because I was a little worried about the pressure popping the valve out if it doesn't catch all the threads. Also Im not able to put the mag plate back on with the new fill valve.. It sticks out about 3-4mm's.

[m102404]

Maybe the specs changed a bit. Mine sat higher too...but the plates went on.

[caboose36]

That could very well be. Well after work Ill probably get to fiddling around with the dang thing. That and trying to get the barrel nut to stop undoing itself! That is the thing that is driving me nuts..

I picked up a "Socom Gear" DD Mk18 RIS, and when I fitted it I had two problems.

A: The O-ring around the barrel kept getting chewed up by the barrel nut and having to be replaced.

B: After fitting it, and after a couple mags the barrel nut would loosen up enough to make the outer barrel move very much freely..

Oh, and trust me.. I have tried thread lock..

[m102404]

Ditch the o-ring Cab.

There's some adjustment points but yeah, the vibrations on these things are a biatch.

I'll document something for you the next time I have my rifle apart.

Tys

[caboose36]

Hey Tys,

Sounds good. Its been awhile.. Hope everything is good on your side!

I was going to ditch the o-ring but I cant screw the barrel nut on all the way w/o the o-ring because it will only go on so far and still allow the barrel to move around.. I heard about the thread modifications but I'm still a little unsure about it.. How do I remove the threads?

Dremel with a cutting wheel?

Caboose

[SHaKaL]

Originally Posted by m102404

Ditch the o-ring Cab.

There's some adjustment points but yeah, the vibrations on these things are a biatch.

I'll document something for you the next time I have my rifle apart.

Tys

This will help me to because i just ordered one (s-g dd mk18 ris)

[technosnob]

Originally Posted by caboose36

A: The O-ring around the barrel kept getting chewed up by the barrel nut and having to be replaced.

B: After fitting it, and after a couple mags the barrel nut would loosen up enough to make the outer barrel move very much freely..

I had the same issues with mine. For the o-ring I used a fair amount of silicone grease to keep it from binding/tearing. In respect to the barrel nut you might want to consider using a couple rounds of teflon tape to remove the excess play.

[lontearab]

hi , i am planning to build a sniper rifle wannabe based on WE HK 416.
here's my question :

1. is it funny that i used a 505/455mm inner barrel ? 'coz the origin of hk 416 used 363mm inner barrel . will it suitable

2. can i install the magpul PRS for gbb into my WE HK416 ? ( it says it suitable for gbb WA type )

3. what else parts/acc to make my dream come true ??

4. thanks for the help i'm really appreciated

5. sorry for my bad english

[m102404]

Originally Posted by lontearab

hi , i am planning to build a sniper rifle wannabe based on WE HK 416.
here's my question :

1. is it funny that i used a 505/455mm inner barrel ? 'coz the origin of hk 416 used 363mm inner barrel . will it suitable

2. can i install the magpul PRS for gbb into my WE HK416 ? ( it says it suitable for gbb WA type )

3. what else parts/acc to make my dream come true ??

4. thanks for the help i'm really appreciated

5. sorry for my bad english

1. There shouldn't be an issue with a longer barrel (providing you can find a suitable one that works with the WE hopup)...the gas system will continue to dump gas down the barrel until the BB is out. Expect very high velocities...

2. I can't recall the buffer tube spec on a WA...but the WE buffer tube is mil-spec sized...so anything that is built for that will work. The measurements might be in this thread...or else there are some other threads in ASC with the dimensions listed.

3. dunno...if you're copying something real...go with those parts. If you're just making it up...make it up. Suppressors don't reall do much on the GBBRs...that'll be more for looks. I've always wanted to try the type of bipod where one leg clamps on either side of the RIS...I'd probably do that.

[lontearab]

Originally Posted by m102404

1. There shouldn't be an issue with a longer barrel (providing you can find a suitable one that works with the WE hopup)...the gas system will continue to dump gas down the barrel until the BB is out. Expect very high velocities...

2. I can't recall the buffer tube spec on a WA...but the WE buffer tube is mil-spec sized...so anything that is built for that will work. The measurements might be in this thread...or else there are some other threads in ASC with the dimensions listed.

3. dunno...if you're copying something real...go with those parts. If you're just making it up...make it up. Suppressors don't reall do much on the GBBRs...that'll be more for looks. I've always wanted to try the type of bipod where one leg clamps on either side of the RIS...I'd probably do that.

yup i 'm going to install with RA-Teach Stinger hop up replacing the crappy we hop up. and if i install the 505/455mm inner barrel should i replace the original outer barrel too ? will it still fit ? or should i build from 3rd party external parts ?

and finally anyone use the ra-tech NPAS kit ? should i change the bolt carrier too ? or just with the original WE bolt carrier ?

[m102404]

Originally Posted by lontearab

yup i 'm going to install with RA-Teach Stinger hop up replacing the crappy we hop up. and if i install the 505/455mm inner barrel should i replace the original outer barrel too ? will it still fit ? or should i build from 3rd party external parts ?

and finally anyone use the ra-tech NPAS kit ? should i change the bolt carrier too ? or just with the original WE bolt carrier ?

Don't know the specifics of the inner dimensions of the outer barrel on the 416. If there isn't a lip near the end of the other barrel that prevents the inner barrel from passing right out the end of it...then aside from the cosmetics of hiding that extra inner barrel length there's really no issue. You should check that the inner barrel is centered in the outer barrell....but that goes for any length.

Lots of people use the RATech NPAS...it works very nicely (see previous posts). I don't understand...why would you change the bolt carrier? Do you perhaps mean replacing the stock WE piston body with the RATech machined one? If so...it's easiest to replace the entire unit...but you don't have to...lots of guys use the RATech nozzle with the rest of the stock parts.

[lontearab]

Originally Posted by m102404

Don't know the specifics of the inner dimensions of the outer barrel on the 416. If there isn't a lip near the end of the other barrel that prevents the inner barrel from passing right out the end of it...then aside from the cosmetics of hiding that extra inner barrel length there's really no issue. You should check that the inner barrel is centered in the outer barrell....but that goes for any length.

Lots of people use the RATech NPAS...it works very nicely (see previous posts). I don't understand...why would you change the bolt carrier? Do you perhaps mean replacing the stock WE piston body with the RATech machined one? If so...it's easiest to replace the entire unit...but you don't have to...lots of guys use the RATech nozzle with the rest of the stock parts.

i think u've bring me some enlightment , thanks a lot.
i ask again later , now i'm still waiting for my NPAS kit upgrades. so it means there's no more problem with the original WE bolt carrier.
hoping the Magpul PRS suitable for my HK , if not it'll be a waste since i already ordered it

[bryan]

anyone know how to get a inokatsu in bc canada??

[Dart]

Originally Posted by bryan

anyone know how to get a inokatsu in bc canada??

Yup. Lots of us do. But this is not the place to ask that. The place is in the wanted section. No one will help you any further than this. That is if your not already on a break for out right breaking the rules. Post reported.