The two gunshots were just the initiation. The cheese on top of the mouse trap. A carrot on a stick. A move that was carried out with the purpose of identifying the combat prowess of his opponent, as well as to lock down his movement and trap him against Killstreak's follow-up. The next move after that would end the fight entirely, if Solomon could even survive this one. 

As the bullets reached Solomon's position on both sides of him, he was essentially boxed in, and so sideways movement would momentarily be next to impossible, unless he was as fast as Killstreak, which would be nice to discover at a safe distance, and not up close and personal. 

With both of his guns pointed in their original position, Killstreak started firing them both rapidly, while moving his left arm in a downwards horizontal swing towards the right, and his right sweeping downwards to the left, making an X pattern. Since his movements were carried out at 20x speed , his sweeping motion was faster than the movement of the bullets, and so instead of firing a single bullet at a time, the guns would instead produce two steady lines of bullets in front of him that would travel forward in an X pattern, hitting in-between the space his two previous bullets were aimed for. If they were to hit their mark, Solomon's body would likely be cut to pieces, then the bullets would explode. 

The timing of his follow-up volley to his first two shots, were so that the X patterned volley was fired when the first two bullets were right next to Solomon. Since the two combatants were at a distance of 10 meters between each-other, Solomon had roughly 0.025 seconds to react to Killstreak's follow-up. Since Killstreak was already aiming his guns at the starting points, the guns being fired (which would seem like rapid machine gun fire to outside sources) were the only heads-up to the oncoming attack he would get. As for bullet count, roughly between 15 to 20 bullets were fired.

Will Solomon survive!? Tune in on the next breathtaking episode of.. Pwnz0r-TV!