MK3A1

The Pancor MK3A1 Jackhammer is a 12-gauge, gas-operated, fully automatic shotgun. It was developed by John Anderson in 1984 and patented in 1987. Its cumbersome design never led it to be fully produced and there are only two prototypes in existence.

Battlefield 2
In Battlefield, the MK3A1 is the Tier one unlock for the Engineer Kit. Its main advantage is its fully-automatic firing mode, being only matched in fire rate by the MEC S12K. The shotgun is a valid replacement for the American M11-87 and Chinese NOR982 Pump-Action shotguns, as the MK3A1 has more power per shot, as well as boasting fully automatic fire.

Battlefield 3
The Jackhammer is in the Back to Karkand expansion along with 9 other weapons. It has more ammunition than the USAS-12 when equipped with extended magazines, as well as being the only shotgun equippable with a silencer. There is currently a glitch with the reload where you may start firing halfway through the animation, or you may aim to cancel the rest of the animation altogether. It has high recoil if fired fully auto while aimed down the sight, but only after the first 3-4 shots. Extended magazines is highly reccomended as it doubles the ammunition capacity. The ammo specialization is also highly reccomended, as the MK3A1 uses ammo very quickly. Equipping it on the Support class is another viable option, as the resupply seems faster with the MK3A1 equipped than with other weapons.

There seems to be a problem with the silencer as it does not work with any of the rounds, you will still show up on the mini map to the enemy.

Also the Frag Rounds and Slug Rounds currently have terrible accuracy to the point where even the first round won't always go near where you aimed it.

Along with this there is another glitch in which on Xbox 360 the Extended Magazine will only make the MK3A1 will have 10+1 rounds in a magazine instead of 13+1 which it is supposed to have.

Unlocks

 * Acog 4x Scope
 * Holographic Sight
 * Extended Magazines
 * Taclight
 * 12g Flechette Rounds
 * 12g Frag Rounds
 * 12g Slugs
 * IRNV Scope
 * Kobra Red Dot Sight
 * M145 3.4x Scope
 * PK-AS Holographic Sight
 * PKA 3.4x Scope
 * PKS-07 7x Scope
 * PSO-1 4x Scope
 * Reflex (Red Dot) Sight
 * Rifle x6 Scope
 * Laser Sight