Battle Bracket: Heavy hitters square off in round of 16

A U.S. Air Force F-22 Raptor flies over the Arabian Sea in support of Operation Inherent Resolve, Jan. 27, 2016. The F-22’s combination of sensor capability, integrated avionics, situational awareness, and weapons provides first-kill opportunity against threats. OIR is the coalition intervention against the Islamic State of Iraq and the Levant. (U.S. Air Force photo by Staff Sgt. Corey Hook/Released)

Round 3 of Military Times Battle Bracket is underway, with voting to wrap up Friday at 3 p.m. Eastern. Click here to cast your ballot and join the thousands of others who’ve had their say as we’ve whittle down the field.

A brief breakdown of the remaining four entrants in each region:

Air

F-22 Raptor vs. AH-64 Apache: The Apache continued its streak of dominating wins, downing the UH-60 Black Hawk to become the only rotary aircraft left in the hunt. The Raptor had a tougher time with the F/A-18 Hornet series, but still emerged as the sole surviving fighter jet.

A-10 Thunderbolt II (“Warthog”) vs. B-52 Stratofortress: The Warthog has put up some of the biggest margins of victory so far, but the B-52 literally will be its biggest test yet, boasting a maximum takeoff weight of nearly a half-million pounds.

Drill instructor Sgt. Donald Miller corrects a recruit March 25, 2014, on Parris Island, S.C. Drill instructors like Miller, a 28-year-old from Nacogdoches, Texas, guide new recruits through in-processing and teach them how to act before they begin the official training curriculum. Bravo Company is scheduled to graduate June 20, 2014. Parris Island has been the site of Marine Corps recruit training since Nov. 1, 1915. Today, approximately 20,000 recruits come to Parris Island annually for the chance to become United States Marines by enduring 13 weeks of rigorous, transformative training. Parris Island is home to entry-level enlisted training for 50 percent of males and 100 percent of females in the Marine Corps. (Photo by Cpl. Octavia Davis)

Marine “knife hand” vs. “Woobie” for the right to reach Battle Bracket’s quarterfinal round.

Photo Credit: Defense Department images

Personal

Marine “knife hand” vs. Poncho liner (“Woobie”): Perhaps not the most lethal of competitors — though Marines may argue the point by using knife hands, oddly enough — both entrants have built strong bases of support in the early going. Among the carnage in their paths to the third round: The AT4 rocket launcher and the M2 machine gun. The knife hand even knocked off the PT belt, much to the dismay of meme-generators everywhere.

M4 carbine vs. Mk 19 grenade machine gun: The standard-issue rifle shot past the M1911 pistol to reach the third round. Its opponent comes off a victory over the Ka-Bar knife, a sentimental favorite to join the knife hand in an all-blade quarterfinal showdown.

Sea

Nimitz-class carrier vs. Ohio-class submarine: The aircraft carrier cruised to a win over the America-class amphibious assault ship in the second round — crushing news to receive so soon after returning to sea. The sub already has a few legends under its belt, having bested the Burke-class destroyer in the first round before downing the USS Constitution to reach Round 3.

Tomahawk missile vs. Close-In Weapons System: Do you prefer to deal destruction a few thousand rounds at a time, or with one big bang? This shipboard style clash could be one of the closest matchups of the round.

Land

Abrams tank vs. M777 howitzer: The howitzer has a steep hill to climb — alongside the Warthog, the Abrams has been a top performer in the early rounds, easily obliterating the M270 Multiple Launch Rocket System to reach Round 2.

Stryker vs. Cougar MRAP: Winner gets bragging rights among the no-tread set. The Cougar took out close relatives (Buffalo MRAP and Humvee) to reach the third round, while the Stryker bounced the M120 mortar system in a lopsided Round 2 showdown.

Click here to vote. Already made your choice? Hit the campaign trail on social media with the hashtag #BattleBracket .