Look at this custom work done by Impact Force CQB on the APS CAM870 Shotgun. Calling it the Impact Force Custom CAM870 Gold Extended Version, this can be ordered for HK$7,689 or almost a thousand US dollars... "You're looking at one of the most realistic M870 replicas on the market. The APS CAM870M most certainly looks the part, has similar dimensions to the real steel version and is definitely a shotgun you don't want to be on the receiving end of. You'll most likely do the number 2 in your pants as you receive 12 BBs and a shot cup to the torso.

At first glance, you may not think this is a skirmishable shotgun replica, but that all changes when realize that it come with a shell catcher which is hugely convenient for those who don't want or cannot be bothered to pick the shells up after each game.

There is a rule in Hong Kong where the largest object that leaves an airsoft replica has to be under 2 Joules / 465 fps. The Shot cup is the largest object and is ejected at around 280 fps, taking into account its size and weight, adds up to around 2 joules. The 12 BBs fly at around 280 fps once it leaves the barrel. You may think that isn't much at all, but remember there are 12 BBs so you'll feel it nevertheless!

You're probably wondering, how does 12 BBs make its way through the inner barrels? APS decided to reject the whole inner barrel idea and just have the barrel itself which is fantastic! The thing is, if it doesn't have an hop up unit or a precision inner barrel, won't it only travel around 10 meters before the BBs start to drop? Yes it would, but the shotgun is meant to take out a large group in such a short range so this was perfectly designed for a CQB scenario.
 
Here comes the modified parts:

• A.P.S. Reinforced Carrier by Stainless Steel
• A.P.S. CAM870 Key Mod Fore End (9 inch)
• A.P.S. 3-Gun Competition Receiver for CAM 870 Shotgun
• A.P.S. For end Cradle with Titanium Nitride for M870
• A.P.S. Reinforce Push Pin for CAM 870 Shotgun
• A.P.S. Dynamic Follower for CAM 870 Shotgun
• A.P.S. Magazine Extension Tube Adaptor for CAM 870 Shotgun
• A.P.S. Drop Tube Adaptor DTA for CAM 870 Shotgun
• A.P.S. Vertical Pistol Grip VPG for CAM 870 Shotgun
• A.P.S. Extended Upper Barrel
• A.P.S. Tactical Picatinny Rail w/ Sling Swivel for CAM 870 Shotgun
• A.P.S. 11" Magazine Extension Tube for CAM 870 Shotgun
• A.P.S. Titanium Nitride Bolt for CAM870
• AKA Spare Shell Carrier for all Shotguns Shell
• VLT Style MOD Stock Black
• 6 Position Buttstock Tube"