edit: probably better off asking in here, am i alright to use the 5/8'' needles for IM injection in the thigh? Have done in the past and was more comfortable than the 1inch ones
In answer to your question, of course you are, you can use whatever you want to, but im'ing street gear is a bad idea. It will get infected and the site will be sore.
I have to use the long blue spikes now, I think they are 1.5". Been using the fuckers for years, can't even get my arms with anything else, and if I want to have a go at the groin it's a mother fucker of a green spike, they look like javelins.

