Only buy the Long version if you have a 510 that isnt reading the tank. Over time 510 springs weaken and you need a longer 510 pin on some to read rtas.
By the standard if your simply replacing the stock 510.
Only buy the Long version if you have a 510 that isnt reading the tank. Over time 510 springs weaken and you need a longer 510 pin on some to read rtas.
By the standard if your simply replacing the stock 510.