The Beretta AL391-Xtrema2 is a semi-automatic shotgun produced and developed by Beretta, an Italian firearms manufacturer.
The Xtrema 2 is frequently used by target shooters and hunters, mainly with the United States. The relatively new shotgun is often referred to simply as the Xtrema2. The Xtrema2 can be purchased based on several variants, depending on barrel type, barrel length and factory installed camouflage exterior.
The Xtrema2 was first released to the market in mid=-2006, to fulfill a demand from target shooters and hunters for a complete do all shotgun. Beretta's primary goal was to create a shotgun that would reliably and accurately fire 2-3/4" loaded with light fill target loads throughout the more sizeable 31/2" super magnum round without any settings or other modification to be added to the shotgun. Beretta decided to take the extremely popular AL391-Xtrema, and to severely modify it with updates to supply the demand. Beretta also wanted to reduce recoil as significantly as possible and increase follow up shot accuracy while hunting and target shooting
The Xtrema2 was equipped with numerous features that were designed to increase reliability and accuracy. The first is that Beretta stripped away as many springs and o-rings as possible for less chance of wear and tear, and also enabling the weapon to be field stripped while negated the loss of any parts. Beretta selected a gas operated action instead of the more conventional inertia driven action, because the former has less overall moving parts, and does not require changes or modificaiton as the shell load is changed in any way.
Another distinct advantage of the shotgun is its over-bored barrel design, this unique design starts out larger than normal at the chamber, however tapers off to a cylinder choke bore at the muzzle. This feature significantly improves shot-pattern and reduces muzzle jump.
Beretta also spent significant time redesigning the weapons stock choke system by increasing the length of the choke within the barrel of the shotgun for a more gradual construction, and not having to add to the overall length of the barrel similar to after market choke tubes. Beretta then also selected to add the time proven technology of hydraulic shock absorption similar to what is found in cars and add it to the weapon's stock for a significant recoil reduction at the shoulder, up to 44%.
The manufacturer also added features to protect the gun from the elements within harsh hunting conditions, like water fowl hunting where the pounding of salt spray can severely damage a gun within hours. Beretta's response to this need was to coat the Xtrema2's working parts in a micro-thin membrane which protects the metal from any type of corrosion while in the field.
Other improvements to the shotgun include an extra long barrel tang to more precisely fix the barrel tot he receiver. this increases accuracy when firing slugs with a scope equipped to the receiver.
Stock spacers are also readily available to alter the Length of Pull (distance between the butt end of stock and trigger) without any major modification.