Re: Overall ok 1st day with SL8-6, But one problem..
Not easy to inadvertantly bump fire the SL-8 / G-36 trigger group. Relatively long reset. Drop the lower reciever off ( do this over a clean workbench )
Pull trigger while letting hammer down under the control of your thumb. The front reciever cracks easily if you let the hammer hit it. Inspect the sear notch ( right in line of the axle ( thats what HK calls pins for some reason )
If this looks ok, you can inspect the the corresponding tip of sear. You will need to remove the hammer to do this
Also ensure that the sear moves up and down freely (rides on the lowest axle ) but there is also sufficient tension. Should be fairly hard to push down ( there is a coil spring at the bottom )
Lastly inspec the "catch " which is on the LHS on the same shaft as safety. The nose ( the ratchet protion ) of this should be able to push DOWN freely but be under spring tension. If this catch sticks, it will fail to catch the hammer and the hammer will follow through. The locking lever ( the much larger piece this small catch rides on ) should move UP under spring tension. On the back, LHS of hammer you will also see corresponding notch.
If the catch or sear is a worn or sticking it can ocassionaly cause a double triple etc. Extreme case gun will empty mag.
FYI : the SL-8 / G-36 trigger group is far more complicated than an AR FCG
Obviously the hammer following the bolt home would seem dangerous ( bolt may not be locked ), but the G36 Armourers manual says that you only run the risk of light primer strike. Go figure
I highly doubt it is a soft primer issue since I have run over 8K rounds through two different SL-8s and never had the inertia of the firing pin set of "non mil spec" primers. I have used everything from CCI, WIN, Fed with no problems. Same could be said for my ARs that have heavier firing pins than the SL-8 ( SL-8 has a feeble thin firing pin
Also, all the SL-8s I have benched are great shooters. Using Gr WWB is not really doing this gun justice. Assuming your scope is not moving, you should try some better ammunitions ( I run 69Gr SMK handloads when I check 5.56 guns for accuracy ) The SL-8 has a hammer forged barrel that is much heavier profile than the G-36