I didn't buy it; i got it via PIF. I either use a Protank II, Protank 3, or the Squid RDA that was also PIF'd.
Here's the link to the
Bolt.
The standard bolt (linked) is an 18500 device, the extender ring will allow use of a kick with the 18500 or a single 18650.
The Bolt is NOT a mech, it has a tiny wire that connects all the bits in the top cap. (The bottom spring is the first point of failure and the button is number 2.)
The bolt HATES to have any devices attached tightly!!!! Snug or loose snug is the best for a BOLT. ( no, the gap will NEVER go away).
It is a decent device, but IMHO, transitional.
Congrats on the gifts.
Cheers
I