You can get more reliability out of your Remington 870 shotgun if you upgrade its carrier dog spring, or sometimes called the carrier latch spring. Sometimes you will find that your shotgun has feeding problems which will make it unreliable when shooting it. But if you were to use a heavier carrier dog spring then it will fix these feeding problems and improve the gun’s reliability at the same time. The spring does this by lifting the next round of ammunition after it comes out of the magazine tube. If the rounds don’t get lifted properly then you won’t be able to keep shooting your weapon. This could put you at risk if you’re in a situation where you need to defend yourself. That is why Remington 870 Police shotguns are the most reliable because they use the best carrier dog springs. If you want to put one of these springs in your Remington 870 then you can get it from model 1100, part number F16966. This is the exact carrier dog spring used in the police version of the Remington 870, but the spring is also compatible with other Remington 870 versions.