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The Mossberg FLEX 500 pump-action shotgun is a very popular gun because it does so much that’s so right at an affordable bang for the buck price range. The FLEX 500 is actually a small family of three guns: the FLEX 500 All Purpose, FLEX 500 Super Bantam – All-Purpose and the FLEX 500 Youth Combo Field/Deer.

Let’s start with the name. The FLEX moniker comes from the gun’s easy adaptability and interchangeability of certain components and accessories for not only the 500 series of guns, but also Mossberg’s own FLEX-22 Rimfire Autoloading Rifle and the MVP FLEX Centerfire Bolt-Action rifles.

FLEX accessories include forends, pistol grips, butt-stocks and recoil pads (butt pads). Not everything can be interchanged between the 500s, FLEX -22 and MVP FLEX guns, but, for instance, the Flex 500 and FLEX-22 can share recoil pads while all three guns can swap butt stocks and grips.

The FLEX 500 can use several different forends and barrels.

Equally impressively, changing out all these different parts is done with extraordinary rapidity thanks to Mossberg’s Tool-less Locking System (TLS) architecture that uses snap tight interlocking parts and thumb screws.

So let’s quickly compare the three Mossberg FLEX 500 models: the FLEX 500 All Purpose, FLEX 500 Super Bantam – All-Purpose and the FLEX 500 Youth Combo Field/Deer. All are 5+1 capacity vent rib pump-action synthetic stock shotguns that come with the Accu-Set chokes. All are black. All have dual bead sights. They differ as follows.

The FLEX 500 All Purpose is designed for adults and is a 12 gauge. The barrel is the longest of this trio, and comes in at 28” of length. Length of pull is 14.25” while overall length is 48.25”. It’s also the heaviest at 7.5 pounds. All three guns have a blued barrel, but the FLEX 500 All Purpose’s barrel is matte blued.

The FLEX 500 Super Bantam – All-Purpose is a 20 gauge gun with a 22” length barrel, length of pull of 12.5” and an overall length of just 34.5”. It weighs 6.5 pounds.

Last, but not least, is the 20 gauge FLEX 500 Youth Combo Field/Deer. It has both 22” and 24” barrels. Length of pull are 12.75” and 14.625” respectively, length is 34.75” and 36.75” respectively and weight is 6.5 and 6.75 pounds respectively. The 24” barrel has adjustable rifle sights in place of the 22” barrel’s dual beads. It also has two combs for enhanced comfort, etc.

While Mossberg is based in New Haven, Connecticut, the Mossberg FLEX 500 guns are Made in USA at the company’s Eagle Pass, Texas manufacturing center.

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