bear looks way more natural. jb was right. the sky has a too-harsh contrast. even tho it's a background, it is just as revelant to the overall design you're doing. don't be discouraghed. learning this artform in all its facets is not an overnite, done deal.
i'd spend some time with a pencil to create hilite and gradual transitioning to darker shade values. the lines you show on the bear are never going to appear natural. perhaps that was your goal but simply never pushed the drawing that far. it's a very good thing to create with a pencil first...
'jb" as i refer to him has given many useful ideas to those of us that lurk here. his attitude on sharing ideas is the very basis of sams' intention when starting this forum.
there are those of us that get good tips and ideas from folks that are a bit reluctant to chime in here. your idea is an excellent one. no reason for a newbie to do a "first" on such an item. it's a learning experience without the danger of ruining an otherwise pricey firearm.
welcome to the forum. the dual angler as ii call it is the best bet for a newbie. it gives any geometry you could possibly want. the apex is useful for those who know time is money. till one becomes competent, the kiss principle is best. once your skill level grows, the more advanced stuff will...
be careful. many of those oldies were used on soft metals in jewelry stores. many will not work on harder materials such as steel. my understanding is that some could be heat treated to work on harder mtls. only way to know is give each a try on mtls of different hardness.