Yes we have a book about this specific field, but always remember that inventors can filed their own patent application, no attorney is needed.
We are going to fill in a lot more in this section as time goes by, but want to just congratulate you on one thing: the firearm/weapon, and outdoor industry is wide-open for all kinds of innovation. Further, their target audience has shown serious commitment to spending $money. So, stay with it! Keep on innovating!
And watch this space . . .
We included a link to this inventor self-help book, but we also encourage you to explore the rest of this site.