wdahm519

I have a how to for exactly this if you look way back. Just search it.

Its finally time to sell my KJW M4 guys... you can check it out in the commerce.

Yup pretty much this.

Yes, I had to custom mount the UBR by drilling and tapping a mount with a screw in the rear of the buffer tube. It actually didn't take that long. There were a few fitment steps other than that, but that was the main challenge - not that it was much of a challenge. In this thread further back I wrote up how to custom mount the UBR to the KJW M4, however after reading through this thread most of these questions have been answered 2 -3 times in this thread.

Eh you might have to file down certain parts of a standard KAC style 7" RIS. For the best effect, I would purchase a free float RIS with a proprietary barrel nut. That way you know it will fit. However, this doesn't fit some rifle "kit" looks if you're going for a dated era. I just wanted to let you all know that the serialized M4 still lives. I got this rifle way back on page (insert low page number here!) and its still a trooper. This was back when there was only one KJW m4, the full length M4 barrel type, and you had to machine your own 10.5"! My 00075.

Its nice to have metal smashing metal and all, but as we have seen over and over again from Raven1's testing on the KJW M4, the plastic incorporated into the bolt lightens it and therefore yields an extremely reliable gas blow back system unlike any WE or WA system seen before. What I'm worried about with the GHK PDW is that its going to be another WA wanna-be with all metal 100% realism inside - which as we've seen DOESN'T WORK WELL! Unless you're running at extremely high pressure with CNC'd parts, you're either not pushing enough power or you're sacrificing reliability for realism. I

Its ACM, I even wrote up a HOW-TO Guide for installing it perfectly I think it was a page ago, maybe 2 pages back in this thread. Go check it out if you're interested. The ACM UBR is $70 shipped from T-Tiger on ASF, and the installation is more or less simple. It requires removal of the old tube, tapping of the rear cap, and installation of the new tube. That's about it. Took me 30-40 minutes in total, which included fiddling around with what to do, etc.

I partially finished a build of mine today. The only thing that needs to come in is the Surefire M600c Scout Light and Surefire M76 Scout Light Mount. They're not too important for the actual gun though.

I can't edit my post anymore, so I'll just post again... I just finished modding my ACM UBR. It was really easy. Thanks to Rookie Ab for helping me out with this and giving me some great ideas this week! This guide works well for all UBR's made to work with AEG's (AEG type buffer tubes), if you have one thats meant for a gas blow back rifle (has threads on the buffer) read the extra step. 1.) Unscrew the grub screw from the bottom of your original stock tube, after removing the stock you had on the tube beforehand. Also, at the time remember to remove the buffer and b

Lol, yeah I have a very good idea about what I'm going to do this evening and tomorrow to get it all working. Thanks for all the info. I'll post up a Co-DIY that will give both of us credit maybe at the end of the weekend or something.

PM'd you for ideas.

Well, since no one else really seems to know how to mod a UBR to a KJW m4, I will take the stand. I just ordered an ACM UBR through T-Tiger on ASF, and when it comes I will do a full HOW-TO on modding a UBR (AEG Type) for your KJW m4. I was frustrated that no one had made a DIY for it, and I'm sure many others have been before me. However, hopefully by next week I will have a full how-to for this application.

Has anyone found a guide or just knows how to install the Magpul UBR (PTS, NON-WA) onto the KJW m4? I'd really like to put one on my build, but I just don't want to risk $170 to a stock that won't work.

For those of you interested in the DD rails that use the Lite or RIS II proprietary barrel nut, the Daniel Defense Lite/RIS II Tool made for that different barrel nut is now $10 instead of $19, which is nice. I bought the tool for my real steel and I thought I'd pass on the info. T_hum, did you ever hear from Clare?