Help with an action scene

I've kind of hit a bit of a wall - I've decided that one of my early action scenes is in desperate need of rewriting to match the tone of the rest of the work and keep people more in character. The action in Remus is always supposed to be somewhat exaggerated, but I don't want everybody to turn into Sylvester Stallone.

The scene in question is early on, and involves a mission to retrieve a massive amount of guns and ammunition from a government facility. As written, it boils down to "The Resistance shows up at a warehouse and promptly gets pinned down by gunfire. Ryan (main character) gets sent to sprint off and flank the attackers. Alone. With a half-empty pistol. He gets extremely lucky and comes across a box full of assault rifles, then somehow manages to get behind the enemy and draw their fire. This allows the Resistance soldiers to close and perform feats of individual badassery."

I have come to hate this scene as written.

The alternative I have come up with is this: Jason, the commander of this particular branch of the Resistance assumes that with Ryan, the Resistance's main arms supplier, presumed dead, the CIA will realize that the Resistance is now willing to take desperate steps to acquire supplies. With that in mind, he disguises some of his own troops as a CIA team sent to reinforce the armory where Ryan's confiscated weapons are being stored in case of a Resistance attack. The plan is for the "reinforcements" get access to the armory, load up, and then wipe out the CIA agents manning the facility. In the event that something goes wrong, another team of Resistance agents will cut the power to the building and a few additional troops, including Ryan, will go in with night vision goggles.

The problem is that I'm having a hard time figuring out how to present option 2. I'd write more about what I'm looking for, but I'm not entirely lucid right now. Any input on how I can get this done would be much appreciated.

Well, you've got the plans of one side down, looks good to me. Presumably your next step is to develop that into the series of events that actually take place.

You've as yet only shown one side of the story. Presumably the armory commander has his own plans about how to secure the weapons from possible theft, what are those? It's how the various characters react to the developments that's going to shape what transpires.

And don't forget to just throw a massive wrench in the works at some point. I think of any written conflict as having three sides: the protagonists, the antagonists, and the most important character of any story: the environment. And the environment is an asshole that likes to screw everything up for everyone else.