Upgrade Guide - G&G F2000
An in-depth review of the stock G&G F2000 internals, recommended upgrades, and tips and tricks from my experience using the F2000 for several years.
The stock internals in the G&G F2000 are good quality for beginner to intermediate players, but experienced techs will find some parts need replacing. With the exception of the trigger, the stock gearbox can be run reliably for years if you are satisfied with the out of the box performance.
Barrel & Hop-Up
My Experience
The stock brass tightbore barrel and hop up provide good accuracy and range. While not laser accurate, the stock performance is good enough that I still haven't upgraded to a new barrel or hopup (not to say that upgrades wouldn't improve it). Although the adjustment wheel is hard to move with gloves on, the hop up is sturdy and hops heavy bbs with no problem.
Upgrade Tips
· Barrel is 430mm long, 6.04mm brass. Look for nicer brass or steel barrels (ex. Prometheus) for upgrades for better accuracy. Medium Upgrade Priority.
· Hop-up bucking is a G&G green. Widely regarded as a quality bucking. Upgrade this to flat hop for better range. Medium Upgrade Priority.
· Chamber is proprietary. No upgrades available.
· Inner barrel fits the outer barrel snugly, so no barrel stabilization is required.
· Don't forget the small o-ring that fits on the barrel in front of the hop chamber. This keeps the chamber pressed against the gearbox. #6 o-rings are perfect replacements.
Electronics, Motor, & Gears
My Experience
The slow motor is one of the first thing's I'd recommend upgrading for better trigger response and fire rate. The stock gears have lasted me 4 years and tens of thousands of rounds without failing. These are not a required upgrade unless you want to change the ratio. The rate of fire limit at my field is 20 rps. Using a Lonex A2 (16TPA motor), stock gears, full rewire, mosfet, and 7.4 lipo, I reach 20 rps with quick trigger response.
And of course, the trigger is the biggest weakness of the F2000. The trigger is prone to malfunctioning, causing semi auto to stop working. This unfortunately has become the reputation for the F2000. If you're reading this, you probably know that I make and sell microswitch triggers for the F2000, called the M-Trigger. The M-Trigger fixes the semi auto problems, and shortens the mushy trigger pull. Highly recommended.
Upgrade Tips
· Trigger is most likely part to fail. At minimum, add a mosfet to protect contacts, but upgrade to an F2000 M-Trigger for much better trigger feel. High Upgrade Priority.
· Wiring is decent quality. Deans connectors recommended at minimum, new low resistance wiring recommended for mosfet installs for slightly better fire rate. Medium Upgrade Priority.
· Motor is not good for trigger response. Upgrade with long type 16 TPA motor (ex. ASG 30k) for better trigger response and higher rate of fire (20-30 rps). Alternatively, pairing a 22 TPA (ex. ASG 22k) long motor with high speed gears will give better trigger response. High Upgrade Priority.
· Gears are reliable for balanced builds. For trigger response or high speed builds, look for upgrading to lower ratio gears (ex. SHS 13:1). Low Upgrade Priority.
· Reshim & Regrease for smoother operation and better reliability. I use Super Lube Synthetic Grease for gears (not for air seal parts). Any brand shims are acceptable.
· Battery space is quite large and can fit a regular 9.6, or large 7.4 and 11.1 lipos. For best performance, a high discharge lipo is recommended. An 1800mah, 25C 7.4V lipo will give quick trigger response and around 20 rps with an upgraded motor. An 11.1 with the same specs will give a fast fire rate of around 30 rps. Both of these fit comfortably in the space below the gearbox.
Compression Parts
For the compression parts, the materials are not cheap or low quality, but they do not compare to the higher end aftermarket parts. I upgraded all of the compression parts (piston, cylinder, nozzle, etc.) in my gun for smoother operation, better reliability, and much improved air seal.
Perhaps the best feature of the F2000 is the adjustable spring guide. It doubles as a quick change spring guide and also grants the F2000 the unique ability to change fps. This pretty much guarantees you'll be at your fields fps limit without going over, and also makes gearbox disassembly extremely easy.
Upgrade Tips
· Spring guide is heavy steel, quick change, and adjustable. The adjustable spring guide is completely unique to G&G's F2000 and P90. I recommend wrapping plumber's/teflon tape around the thread of the spring guide to prevent the vibrations from unscrewing the spring guide during firing. No upgrades available.
· Spring is good for 350-400 fps depending on where you adjust the spring guide. With my upgraded compression parts with excellent air seal, my gun reaches 400 fps on the stock spring with the spring guide about 75% forward. Low Upgrade Priority.
· Piston is polymer with no metal teeth except for the last one. An upgraded piston with half or full steel rack (ex. Lonex Blue or Red, Angel Customs Kratos) is recommended for reliability. The plastic teeth on the stock piston will break or strip at high rps or fps. High Upgrade Priority.
· Piston Head is POM (plastic) and has no major flaws, but can be upgraded to a nicer quality one with bearings (ex. Lonex POM). Replacing the piston head with a #14 o-ring is a good way to improve air seal on used guns without buying a new piston head. Low Upgrade Priority.
· Cylinder is brass and is ported. Ported cylinders are typically for shorter barreled guns, which the F2000 is not. Upgrading to a full length cylinder will improve fps and air efficiency (ex. Gaurder Chromium cylinder). For cylinder grease, I use Madbull Piston Lubricant. Medium Upgrade Priority.
· Cylinder Head is also polymer besides the brass nozzle tube. The cylinder head is proprietary! Although it looks like a V6 P90 cylinder head, the nozzle position is about a millimeter higher. Using a V6 cylinder head with cause air seal and feeding issues. Since upgrades are not available, wrapping it with teflon tape before inserting it into the cylinder is about the only thing you can do to improve air seal. No upgrades available.
· Nozzle is plastic and does not have an o-ring. Upgrading the nozzle to one with an o-ring will improve air seal and improve fps (ex. Lonex AUG POM). The F2000 uses AUG nozzles! Medium Upgrade Priority.
· Tappet Plate is also proprietary and not a V6. The tappet plate can wear down after extensive use and cause feeding problems, be prepared to replace after a few years. A sector delay chip is also recommended to help with feeding. No upgrades available.
· AoE Correction (Angle of Engagement) is recommended for both reliability and to reduce noise. A 1/8" V6 Sorbo Pad is perfect. Note, you will need a dremel or file to remove piston teeth. Low upgrade priority.
Other
Magazines have a reputation for not fitting in the F2000. Try to use magazines that don't have any patterns or extrusions on the outside. Regular flat and plain magazines will work. Mid cap magazines are almost guaranteed not to fit, but there is an easy fix. One of the screws on the bottom of the gearbox interferes with the bb retention spring housing on the top of the magazine. Using a dremel tool, you can cut the housing without affecting the magazine's performance.
Hunter Scope is awesome and completes the looks of the F2000. However, it is only 1.5x zoom and requires your eye to be fairly close to the lens, something that is not easy or maybe not even possible with face masks. I also have the railed upper receiver without the scope, but after 7 years, I've only taken the scope off for night games so I can use an illuminated optic. Scope vs Rail is entirely personal preference, as long as your fine with having no rails.
Thanks for reading and be sure to check back often for new reviews and guides.