You can bring evil rifles and others into the state, ONLY IF going to a Organized or competitive event.
Weve had HK shoots at Wooster Mountain in Danbury a few times, Talking a dozen people or so, and 3-6 from out of state., organized 2-3 months out.
Here is the info, But I would call the State, dont want you getting into any trouble.
From Packing.org.
"Car/Gun law summary
Date updated: Aug 27, 2005 @ 1:59 pm
Sec. 29-38. Weapons in vehicles. Any person who knowingly has, in any vehicle owned, operated or occupied by him, any weapon for which a proper permit has not been issued as provided in section 29-28 or section 53-206, or has not registered such weapon as required by section 53-202, as the case may be, shall be fined not more than one thousand dollars or imprisoned not more than five years or both, and the presence of any such weapon in any vehicle shall be prima facie evidence of a violation of this section by the owner, operator and each occupant thereof. (You must have a Connecticut CCW to carry a handgun in a vehicle.)
The Following information was taken from the "Board of Firearms Permit Examiners Website"
Q43. May a non-resident of Connecticut transport handguns in this state when he comes into (or goes through) Connecticut when taking part in pistol competitions (in or out of Connecticut) or when attending any meeting or exhibition of any organized collectors' group (in or out of Connecticut)?
A. Yes, but only if and while he or she meets EACH of the following requirements:
(1) Is a bona fide resident of the United States.
(2) Holds a valid permit or license to carry a firearm issued by another state, city, town, etc., within the United States.
(3) The purpose is strictly as stated above.
Note:Weapon should be stored unloaded, in a locked container, not accessible to the passengers in the vehicle"