Team Airsoft's In House Review

    The SIG 551 is a shorter version of the SIG 550. While being compact and lighter than its companion, it still quite as deadly.

Realism                             

    Although Ive never heald a real SIG, the gun is a dead look-a-like to pictures. The gun is heavier than youd think as well. The SIG is the only airsoft gun with the 3-round burst option, this can also be changed to a 2-8 round burst. The selector switch is ambidextrous, which means firing modes can be selected either left or right handed. The trigger guard may also be moved for wearing winter gloves.
 

Functionality                                   

   The functionality of the gun works well. The hop-up is easy to adjust, batteries are easy to swap out. The gun uses the 8.4v AK-mini batteries, while not the longest lasting batteries, they will hold out for about 1000 rounds. The fire rate of the gun is exceptionally high. I found it will shoot faster than most other sub-machine guns. The folding stock will stay in place when you move it, and is easily put pack into a normal firing position with a good pull.  
 

Effectiveness On the Field

     The SIG, being my main weapon, gets alot of use. Ive had many a kill with it. The gun works great in both CQB and normal combat.The ability for magazines to attach together, which allows you to reload a high-cap while firing your other one, is a great advantage. The gun comes with four sights, while i only use the open sight, the others are just as effective. The gun is very accurate and has a high rate of fire given the length of its barrel. Ive shot targets at a good 60 feet with it before. While I myself am not sure what motor or springs or gears i have in this gun, i see no need to upgrade it given how well it does.
 

Problems

   No matter how much you like a gun, it will always have problems. The batteries, 8.4v AK-minis, drain after about 1000 rounds, this causes me to carry 2 batteries, and i plan to buy a third. The 3 round burst will drain the battery very quickly, ive found it better to leave it on full auto or semi. If you have two or more mags attached together,  and you have an empty attached on the right of the one in the gun, you cannot fold the stock, this can be a problem in CQB games but I found it best to carry the mags normally in those situatiuons.
 

IMO Results

   The SIG overall is a very reliable weapon. Being an effective CQB and field rifle, it makes a great primary weapon. However keep in mind that the batteries drain quickly. This is a great gun overall and would recomend it to beginers or anyone just wanting to try something new.