I have only added a Pearce +0 to my G36 mag. I did have slide locking back problems with an older mag. that I purchased used. I discovered the problem was the older mag follower, and after upgrading that part the gun has worked flawlessly. The G36 has become my main EDC in a Glock Sport/Combat Holster. Good Luck.
Tuica: NRA Certified Instructor; Oregon CHL Instructor; GMG2 - US Navy 1976-1980. USS Coral Sea, 1977-1980. Forward Deployed - The Gulf.