With the San Francisco 49ers opening their three-day minicamp on Tuesday, quarterback Colin Kaepernick met with the media and covered a myriad of topics.

Most notably, the team's signal caller said he's enjoyed working with his newest receiving weapons, Torrey Smith and Jerome Simpson. The two wideouts were added via free agency and have already been spotted making plays during the team's offseason program.

Kap touted his new targets' ability to stretch the field.

"They've been huge so far," Kaepernick said. "They bring a lot of speed to the field and a deep vertical threat. That's something I'm looking forward to this coming season is having the opportunity to take shots (downfield)."

Smith alone has recorded a catch of 50-plus-yards in each of his first four NFL seasons. His longest reception went for 74 yards with Simpson's career-long going for 84 yards. Those skillsets combine nicely with the much-improved 49ers quarterback.

Kaepernick spent much of the offseason tidying up his throwing motion, removing any unnecessary movement and making it more efficient overall. He said it's greatly affected the accuracy of his deep ball, saying it might be the best it's ever been.

"It's something that we've worked on more now," Kaepernick said. "We have the weapons to go downfield. That's something that we've gotten more reps at and gotten more comfortable with, and hopefully that carries over."

The 49ers signal-caller said it's not just about throwing motion for him, but becoming as complete of a quarterback as possible.

"It's a constant competition to see how much better I can get with a throwing motion; being more accurate, being more comfortable with the playbook," Kaepernick said. "It's everything. It's how can I become the best player that I need to be."

Kaepernick also touched on last week's retirement of right tackle Anthony Davis. Kap said he was surprised by the news but wished Davis well, calling him a "good friend."

Even so, the quarterback said he's not concerned with where the offensive line is at this point in the offseason.

"They're working," Kap said. "That's the biggest thing I can tell you. It's a little hard for them to get a feel for it in OTAs without pads, but they're working every day. They've been on top of their assignments trying to make sure they're ready for this season. "It's next man up. We've got to find someone who's able to get the job done."

The 49ers have had a tumultuous few months with little fortune on their side. Davis is the most recent departure of an offseason that has seen the retirements of linebacker Patrick Willis, linebacker Chris Borland and defensive lineman Justin Smith.

This team, however, isn't spending any time worrying about who isn't in the locker room anymore.

"I think everyone realized the players we have lost, and the players we have here are very capable of standing in and being impact players for us," Kaepernick said. "At this point we're going to keep moving forward and keep working."

Kaepernick is coming off a 2014 campaign in which he threw for a career-high 3,369 passing yards and ran for a career-high 639 yards on the ground. Kap also accounted for 20 total touchdowns.

Despite the career benchmarks, he said he looks forward to an even more productive year from the offense in 2015.

"I think offensively last year we feel like it was a let down," Kaepernick said. "We should be able to do more, and we plan on doing more this year. We're working towards that.

"I'm very excited about this season and what we're going to be able to do."