Downgrade For G & P M870 Shotgun

[imperfect_design]

Hello All

Im going to be buying a g & p m870 shottie, and wondered if anyone knows if this can be downgraded, as the fps is listed at around 380 by g & p?

Cheers

Chris

[Fizzy]

Re: Downgrade For G & P M870 Shotgun

Well, a retailer in the UK list them at 1J, so I guess it's just a spring change that's needed

[imperfect_design]

Re: Downgrade For G & P M870 Shotgun

Wondered if i needed a special spring etc?

[sparrowhawk]

Re: Downgrade For G & P M870 Shotgun

i had an acm shottie that i had to downgrade,which i did by taking apart and clipping the spring, its hard to know how much to cut off, but its better to cut off too little than too much so i wouldnt cut off more than 2cms first time around, make sure you take lots of pictures of the internals,as there are usually 4-5 trigger parts that are like a chinese puzzle,and a few springs