It's still very contemporary. As I said in your thread about your pistol. Look at Star Wars weapons, Boba's EE-3, the E-11's, DLT-19's and T-21's carried by Stormtroopers and Sandtroopers, the DL-44's carried by Han and Luke and the pistol used by Leia; they were all based on real weapons yet they didn't scream Earth gun when they were finished. Yours does, big time.
Personally I'd loose both the pistol and the rifle and start again, but I'll assume you want to use them so I suggest the following
1) Loose the magazine on the rifle, possibly remount it on the side (although you want to make it shorter if you do reuse it). Cover the slot under the gun where it used to fit.
2) Replace the front end of your rifle with a longer pipe, perhaps with holes in like the DLT-20a carried by some Stormtroopers - where a STG-44 assault rifle had the barrel of a .50 cal M1917 heavy machine gun added.
http://starwars.wikia.com/wiki/Image
lt20A.jpg
3) Add suitable greebles to it. NO Star Wars blaster is clean, neat and perfectly tidy like a modern Earth gun.
4) For you Colt M1911 - Add greebles and barrel modifications to it. Loose the magazine and make it look different.
Alternatively...
Forget options 1 to 4 and go with option 5
5) Make a Star Wars pistol and blaster from scratch or buy some.