I just shot his gun with the post sample bolt/trigger pack setup vs taking it apart to put it in mine. It came down to shooting his k in full auto with an optic or my k in full auto without one as I didn't bring it. If he had a C or E gun then I prob would have. Another SOT had a C gun at the shoot. Interesting setup but since I'm not a sot it doesn't really matter to me. I just shot his gun in full auto and burst, mine in semi, and then fired a bunch of other guns including the 2 transferable guns I brought to the shoot.
I realize it's not your weapon, so the details are likely unknown to you and frankly none of my business. I'm just curious, and enjoy these G36s. :)
Finally was able to get to the range for a function check. It ran flawlessly and was able to shoot suppressed as well.
It was great to read all the success stories. I just got mine in the mail via local ffl Wednesday and now know what to look for. Always great info on the site. I assume mine is a batch or two ahead of the first run. Hopefully some of the issues are corrected by now. I will say Tom has done some work on my usc conversion and I have always been happy. Great service. Waiting on mandrel and a few odds and ends before I can start assembling.
Just got the receiver in as well, went to pick it up this morning. Came home and did some fitment checks. Hk G36 bcg with original components (original unmodified cam pin, carrier ground down to accept semi-shelf) works well. Looks like Tom must have tightened up the slop side to side compared to the earlier batch, or the metal plate inside where the cam pin rides got perhaps a bit thicker now to catch the cam pin better during the rearward travel of the bolt... I see no issues here. Grip fitment is tighter compared to the old two-piece design version which I also have so I seem to have to file down the trigger housing a bit more at the front part of it. Hk original (new) barrel nut is really snug in the plastic sleeve at the trunnion part... perhaps gsg9 barrel nut is a thinner profile? Not sure on this one. Anyone with the GSG9 front end kit chime in? Overall, the nylon plastic material is outstanding, much more harder yet seems supple enough for heavy duty work... feels more similar to SL8 plastic they use. the earlier two piece design version felt brittle in comparison as I have been afraid to work the stock locking action too hard on that one for the fear of possibly cracking it. Stock retention in the closed configuration seems also a lot better and more substantial and secure. The profile of the notch on top of the ejection deflector is different on the new version, wider and not as tall resulting in easy engagement but a secur hold when folded.
Overall, I am very impressed by this version of the frame. Just need to figure out the tightness of the barrel nut, see if that is hk original versus gsg9 specifications of the nut...
A little more update: mag catch is not locking up too well. I am getting a new hk mag catch shortly so hopefull that solves it. (Also as per other posters stating that the provided catch was out of spec) Also the trigger pack is quite tight in there, that's after grinding off the upper tabs and the front part that contacts the receiver recess. This pack fits the first generation two piece design just perfectly but more needed to be filed down to fit this one. I think I will go ahead and get the gsg9 barrel nut and see if that fits less snug in the trunnion part...
Update: magazine catch issue resolved. You just slap it hard! It doesn't lock up easy and straight like the 1st generation two piece design. This second-gen has a little ledge at the bottom of the trunnion where the front lip of the mag meets the trunnion bottom. First generation is completely flat there at the face of the trunnion. This catches the mag and puts it in at a slight tilt when inserted slowly. When you slap it in, mag seems to just go over this ledge and locks up, bolt hold open also works... I guess as a function of use, I expect this to loosen up a bit so it's good. Just barrel nut tightness issue remains, waiting for a gsg9 nut to get here next week...
Last edited by a2058; 10-29-2018 at 01:47 AM.
Ok, so the barrel was installed using the factory nut. It was tight and I used some sand paper to smooth down the inside of the receiver. I used #1000 wet paper very gently so it hardly removed material at all, but managed to get the nut started on the threads. After it started, I was able to tighten it down to snug. I now just received the gsg9 barrel nut in the mail today. This nut is actually smaller in diameter than the factory HK nut. I measured 1.3795 inch for the diameter of the factory nut vs. 1.3735 inch for the gsg9 unit. The difrence is 0.006 inch (0.15mm) but that could very well make the difference here... In any case, my barrel is already installed and it would be a pain to re do this so I am going to just let this be. But, in the future, this info could be helpful to others with this fitment issue.
I feared that with the original nut being so snug to the plastic, heat transfer and wear from shooting may eventually deform the plastic... not to mention interference on the floating barrel design. Anyway, I highly recommend trying the gsg9 nut if this is a problem (of course measure the diameters using a caliper first).
Otherwise, everything else seems good to go, I use a German modified G36 carrier, HDPS bolt, German firing pin and an original unmodified cam pin, German recoil rod and backing plate, German ambi-mag release, German mag housing, and GSG9 E-length stock.
Last edited by a2058; 11-07-2018 at 02:18 AM.