It took more than 130 years for the GP-1 to be retired, and even then it's still in use all over the place considering the hundreds of millions produced by WickedArms Industries. Solid, accurate weapons to the last, they're practically indestructible. Many have their barrels removed and replaced with ones threaded at the end to accept silencers, but the original military barrel is almost always of better quality, as it is designed to accept AP rounds. The Yamataian military doesn't have any of these anymore, but they're literally in any and every gun shop in the galaxy. Many older models fell into the hands of the Kennewes Nepleslian Reds.
Amateur and professional gunsmiths endlessly modified everything about the weapon, from basics such as swapping sights and stocks, to machining replacement parts out of exotic metals. Common modifications include folding and collapsable stocks, flash hiders, updated trigger mechanisms, and an extended magazine release button.
While 20- and 30-round magazines are standard, gun stores regularly stock magazines that carry as few as four or five rounds, and can carry as many as 100 to 150 rounds.
Price: Available for a mere 100 KS at a Star Army Surplus Store.