e-grip with was board
14" linear all American barrel
retractable car stock
offset red dot scope
They work great and wont come out if you don't push them
They break easily
I have played with my a5 for about 3 months now and the pins work decently but there are some minor setbacks including...
You just about have to have a hammer to get them out of the gun (a plus and a minus)
they do break easily but they are very inexpensive and easy ti find,and if you want you're stock off or you trigger you can dissemble it easily.
Never heard of titanium or any alternative but there could be one out there.
If this was and optional product i would recommend it but its not optional,if you can find titanium or another tougher metal buy those