If you are not planning on putting a scope on that CHEAP inline rifle, do yourself a favor and save your money. Anything a cheapinline can do, that .54 caliber Renegade of yours will do just as well. In fact you want a cheap inline rifle, get a Green Mountain Stainless Steel 1-28 twist barrel for $100.00 plus shipping. That's the same barrel quality as you would find on the expensive Knight rifles. It will shoot as good with open sights as any of the inlines on the market out there. I am sure a person could mount a scope on a traditional Green Mountain Barrel since I have seen traditional rifles with scopes. Then you have the best of both worlds, a traditional style with a optical scoped accuracy and sabot shooting ability of an inline. Green Mountain also sells a .62 caliber smoothbore barrel which is a 20 gauge shotgun and will shoot a big nasty roundball accurate at close ranges.

I've read posts of bad striker slides on the Buckhorn among other problems. Then some Buckhorn owners really like them. If you really want a inexpensive inline rifle of good quality then look at the NEF Sidekick. In your case since you mention you might want rifle barrels and shotgun barrels, perhaps for the time being get a H&R Huntsman. The NEF and the H&R are part of the Marlin Rifle Company (I believe I read) and are good quality.

If you want a line rifle that can have a shotgun, center fire rifle, andmuzzleloader barrel.. then look at the Thompson Center Encore, CVA Optima Elite, or NEF Huntsman. I believe with the Huntsman, you have to send your receiver back in and have the barrel you want custom fitted to that receiver but I could be wrong. The CVA Optima is equipped with a spanish made center fire barrel. Personally if I were going to depend on a single shot rifle/shotgun for serious huntinglike what you want, I would look no further then a Thompson Center Encore. The problem is the rifle is not Cheap and the additional barrels are not cheap. Then again, you normally get what you pay for.