Category: Shotguns (Gas, Spring , Etc)

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Manufacturer: Marushin (Japan)
Type: Gas Pump Shotgun

Marushin – M500 U.S. Version

The Marushin – M500 U.S. Version is a model Marushin specifically built for the U.S. market. Some of its' internals have been beefed up to reliably handle Green Gas and this model fires 3 bbs per shot. Appearance and feel wise, this is 1 of the most realistic airsoft replicas of a real steel gun. Even the sound of racking the pump sounds as if your loading a shell.

Marushin – M500 U.S. Version. Nice Sticker Design 😉

The internal tube feed style magazine carries 48 bb's (16 – 3 shots). The gas reservoir is also internal.

I chrono'd using AEX's In shop radar chrono and at home with my Chrony light based chronograph. The results using Marushin's .27 gram 8mm bb's were surprisingly high if you take into account all measurement were based on 3 shots

Chrono Results (FPS)
.27 8mm BB's Triple Shot
Min: 342.73
Max: 362.42
Avg: 351.21

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Manufacturer: Maruzen (Japan)
Type: Spring Pump Shotgun
Date Acquired: 12/2004

Maruzen – CA870 with TGS Stock System

If you saw a previous posting on my M1100, I was planning on adding the TGS stock system to that gun, but after looking at the gas feed system and the fact that specific M1100 is no longer in production (and may never be again). I decided it would be better if I just picked up a CA870 where I knew i wouldn't bugger up a perfectly good gas system.

I purchased this as a CA870 full stock.

Maruzen – CA870 with TGS Stock System

The CA870 itself is a good spring shotty, but it's only single shot unlike the Marui spring shotguns. if I were to skirmish with a shotgun I wouldn't take this gun though since I have a Marui Spas 12 and M1100.

The fun part of this project for me is the fact all addons are from the Real Steel world. Some minor alterations were needed to the Real Steel parts to make them work. These are posted here www.honolulu888.com.

Tip: The screw used for the stock is a 6mm coarse threaded screw. Hope that saves you time at the hardware store

Items included in the project:

• Maruzen CA870 CQB Full Stock
• TGS M4 Stock adapter
• M4 Collapsible Stock System
• M4 Collapsible Stock Shoulder Pad
• M4 Collapsible Stock Cheek Rest
• Bushmaster HK91 Style Cushioned Sure Grip

Great CA870 Upgrade info is www.honolulu888.com

I'm personally not planning on doing any more upgrades to this gun. It just suppressed my urge to get a real FN Tactical pump shotgun for the moment

G&P CA870 22Rds Short Magazine

Edit: Aug 31, 2006

Added the G&P Long Barrel system.

Size comparison to a TM SPAS12

Added the G&P Tactical Light Foregrip

Chrono Results (FPS) Stock?
.20 BB's
Min: 290.80
Max: 294.50
Avg: 293.20

.25 BB's
Min: 269.00
Max: 272.43
Avg: 270.56

Chrono Results (FPS)?After Adding G&P Long Front Barrel ?
.20 BB's
Min: 307.62
Max: 321.34
Avg: 311.85

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Manufacturer: Tokyo Marui (Japan)
Type: Spring, 3 Shot

TM SPAS12 w/Folding Metal Stock – Upgraded

I guess you can say I'm in a shotty mood lately

This SPAS12 was "Mis-Firing"/Broken when I purchased it second hand. I originally was only going to buy it for the folding metal stock (Since they are hard to find), and buy a new SPAS12, but I found the spare parts being sold at Dentrinity, so I decided to repair/upgrade the unit.

TM SPAS12 w/Folding Metal Stock – Note Shortened "Comando" Barrel

I repaired all internal parts and added a freakishly strong PDI 180% Spring. Parts added/upgraded:

• BB Stopper Gate
• 3x Piston Cups
• Loading Gate
• Piston
• Cylinder
• PDI 180% Pro Variable Pitch Spring

TM SPAS12 w/Folding Metal Stock

When I was stripping the gun I came across alot of glued parts from what seems like a previous repair attempt. I removed the glued parts and the gun is now field stripable.

This gun shoots very hard now. It is also much harder to cock, but I'm very satisfied with the upgrade. No chrono results yet. Will try and post those soon.

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Manufacturer: Maruzen (Japan)
Type: GBB Semi -Auto Shotgun
Date Acquired: 07/2004

Maruzen – Remington M1100 Defender (Magazine Type)

I decided on getting this gun since it does NOT use the ejecting shotgun shells that the Defender II uses. The down side is the magazine only carries 18 bb's which gives you only 6 shots since it shoots 3 bb's at a time. You can easily alter the bolt to feed only 1 shot at a time though.

This gun wil take greengas no problem and the blow back is pretty insane. 1 problem using green gas is the piston head blows back so fast that it will only allow a single bb to load even with the 3 bb piston in place.

Maruzen – M1100 Defender + M4 Collapsibel Stock and Grip System

BUT the real reason I bought this was to modify and add a Real Steel, M4 Stock and Grip system to this gun. EDIT: This project was scrapped and moved to a Maruzen CA870.

Maruzen – Remington M1100 Defender

PDF manual available!