CYMA CGS 10.5" M4A1 CQB GBBR

If you want to get stuck into GBBRs but have a custom build in mind, start with the CYMA CGS 10.5" M4A1 CQB GBBR. This full metal GBBR is based on the Tokyo Marui ZET system on the inside and boasts the same majority steel internals and 6.04mm tightbore inner barrel as the Noveske and Daniel Defense versions but in M4A1 CQBR configuration. This means you aren't paying for any snazzy external parts you may not use, and you can build the M4A1 CQB out how you like it, whether it is a URGI build, L119A1 or practically any other AR configuration out there with the appropriate tools and knowhow.

Starting at the front, we can see a steel birdcage flash hider mounted to the 14mm CCW male threading at the tip of the 10.5-inch alloy outer barrel. This means the M4A1 CQB is ready to be kitted out with a tracer unit or suppressor, or an alternative muzzle device for a more customised look. If you are going for an MK.18 MOD.0 look, add this suppressor if you are going silent!

Next up, we come to the M4A1 style triangular front sight post, which is constructed from steel and houses the front sight and mock bayonet lug. The bayonet lug is non-functional in the CQBR configuration due to the shortened 10.5-inch outer barrel, though if you want to add one you can mount a 4.5-inch barrel extension to allow for it. The front sight itself is adjustable for elevation using an M4/AR-15 front sight adjustment tool, and for less precise work up close it can be used as an index point for rapid aiming when there is no time to align the sights.

Mounted to the bottom of the front sight assembly we have our first sling point, which is a standard steel footman loop compatible with a wide variety of sling types. This can be paired with any of the 3 rear sling mounting options to fit a two-point rifle sling to take the burden off your arms or allow for easy transitions to a sidearm. The perk of a relatively old-school design is that all the sling points are built in, meaning no extra adapters are needed!

Following the front sight, we come to the handguard assembly which is constructed from a combination of alloy, steel and high density polymer. The handguards themselves are the standard 2-piece M4A1 type with a ribbed surface to enhance wet weather handling. The handguards are held in place using a steel handguard cap at the front, and an alloy delta ring at the rear. The handguards are made in two parts, allowing you to remove the lower handguard and mount an M203 grenade launcher to the barrel for some extra firepower.

The modularity of the M4 platform is easily its best feature, and it is no surprise that it gained the nickname "Barbie for men" following its "SOPMOD Block 1" upgrade. This modularity also extends to exchanging external parts, and with an M4/AR-15 armourers' wrench, you can change the entire front set of the M4A1 CQB and make it look like practically any M4/AR-15 variant out there. Even if you don't have an armourers' wrench, the delta ring front end is compatible with any 7-inch drop-in rail system or handguard set for delta rings, so if you want to change up the looks of your M4A1 CQB you'll be happy to learn that it can be done without a single tool!

Moving rearward we reach the receiver, which is a familiar M4/AR-15 layout with a few enhanced parts for a hint of modernity. The receiver is constructed from alloy with a matt black finish and is equipped with a high density polymer dust cover marked "5.56 NATO", in line with the most modern Daniel Defense M4 rifles. At the rear of the receiver, we are also treated to a steel QD sling plate, allowing you to add a QD sling swivel and make use of a single-point sling.

The fire selector is located on the left side of the AEG and sits directly above the pistol grip to provide fast and easy access for right-handed shooters. The fire selector has a 90-degree throw between modes, making it quick to operate but not too easy to accidentally knock it and end up in the wrong fire mode. Each fire mode is indicated with standard M4A1 markings reading "SAFE - SEMI - AUTO" in nice, crisp engravings. Like many GBBRs, the CGS M4A1 CQB cannot be put into the "SAFE" mode without first being cocked, just like a real M4!

The bolt catch is right where we would expect; on the left side of the receiver, smack bang in the centre. On a GBBR, the bolt catch works exactly like the real thing, allowing you to quickly return the bolt carrier to battery after a reload and avoid using the charging handle. As with most of the hard-wearing parts on the  CGS M4A1 CQB, the bolt catch is constructed from steel, ensuring reliable bolt locking in the long term.

The magazine release is on the right side of the magazine well and is ideally positioned to be pressed with the trigger finger from a firing grip for right-handed users. Left-handed users can use their support hand thumb to press the release, and this can be done quite fast with a little practice. The surface of the mag release is textured to provide the necessary gripping qualities, and is protected from accidental presses by the "magwell fence", a raised protrusion in the receiver which stops the mag release from catching on your gear as you move.

The HOP-up unit of the CGS M4A1 CQB is located inside the upper receiver, following the Tokyo Marui ZET system format. Taking the form of a small screw inside the front of the upper receiver, the HOP-up adjustment dial is accessible through the magazine well using a small flathead screwdriver. This is slightly different than the TM ZET System, using a screw instead of the gear inside the TM. The screw system actually makes the HOP-up easier to adjust and avoids the need to remove the charging handle and bolt carrier to access the adjuster easily. The easiest way we found to set the HOP-up is by locking the bolt to the rear and adjusting through the magwell. The HOP-up allows you to tune the M4A1 CQB for different ammo weights and extend your range, looking for the flattest possible trajectory.

The pistol grip is the legendary "A2" type, first seen on the M16A2 and common on military builds. The grip boasts textured panels on each side for improved traction and a finger ridge to help support and control the front end of the Shorty when held in the "high ready" position. The pistol grip is compatible with real steel and TM ZET system aftermarket replacements should you have a preferred grip for your build.

At the base of the buffer tube is an ambidextrous sling plate sandwiched between the receiver and the castle nut. This plate is constructed from steel to provide the prerequisite strength for use with a single-point sling and uses a centrally positioned QD sling socket instead of the usual protruding loop. This sling point is ideal for a single-point bungee sling with a QD sling swivel but can also be used with a two-point sling with the addition of a rail-mounted front sling point.

Following the receiver, we reach the AR buffer tube, which is a common part found on the vast majority of M4/AR-15 AEGs and GBBRs. This buffer tube is constructed from alloy and provides 6 positions of adjustment for the pre-installed L.E style stock, enough to suit any body type or loadout. The buffer tube system allows you to swap your stock out for any aftermarket M4/AR-15 stock simply and quickly, so if you get tired of the looks of the M4A1 CQB in the future, swapping out the stock can style it up!

On the inside, the CGS M4A1 CQB is based on the Tokyo Marui ZET System used in its MWS M4A1. This is already a flex, as the TM system is known to be far superior to other GBBR systems and has the widest aftermarket for upgrades. Speaking of upgrades, CYMA/CGS has sorted many of the known weak points in the TM design by using steel trigger parts, giving you a longer-lasting GBBR platform and saving you a wad of cash when it comes to upgrading down the line.

To provide super strong recoil and an immersive firing experience, CGS added a steel bolt carrier to the ZET System formula, providing heightened immersion thanks to its extra mass. This also means you will need to use a stronger gas than you might in a Tokyo Marui to get the same rapid-fire performance. Also present in the CGS build is a 6.04mm tightbore, giving an edge in accuracy potential and gas efficiency, letting this short rifle do some good work at long range.

If a custom build is on the cards and you're ready for a GBBR, the CYMA CGS M4A1 CQB is one of the best value base guns out there. With a no-frills, military-style external build ready to be customised and rock solid internals building on the best GBBR system out there, the CGS M4A1 CQB makes a great first GBBR and the perfect base for most custom builds!

Features

• Full metal construction
• Gas Blowback Rifle - Heavy recoil, realistic handling, low-cap mags - A rifle for the pros!
• 14mm CCW male threaded outer barrel - Ready for a suppressor or tracer
• Steel Birdcage flash hider - Ideal for military-style builds
• High density polymer M4A1 ribbed handguards - Comfortable and lightweight
• Delta ring handguard attachment method - Compatible with aftermarket handguards for delta rings
• 20mm Picatinny railed receiver - Ready for a red dot sight or scope
• 6-Position M4/AR-15 buffer tube - Adjust the stock to fit your body type and loadout
• Adjustable L.E stock - The classic Colt style Law Enforcement stock
• Low profile "milspec" charging handle - Reduced snag points, steel latch for rigidity
• "A2" Finger ridged pistol grip - Ideal for military-style builds, compatible with aftermarket real steel AR grips
• QD Sling plate - Add a single-point sling using a QD sling swivel
• 5.56mm Marked polymer dust cover - Modern dust cover, very well suited to modern builds
• Gear adjustable HOP-up - Inside the upper receiver, accessible through the magwell, requires a flathead screwdriver
• Full steel trigger group - Save you precious money on upgrades, these will probably last forever
• Steel bolt catch - Another high-wear part made from steel!
• Tokyo Marui ZET system-based internals - Compatible with TM ZET system aftermarket upgrades
• Is this your first GBBR? If so, see the "Special Instructions" section below or our GBBR Guide

Package Includes

• CYMA CGS 10.5" M4A1 CQB GBBR
• 30rnd Green Gas Magazine
• User manual (QR Code)
• Cleaning rod
• Speedloader

Special Instructions

This is a Gas Blowback Rifle. GBBRs require maintenance and careful handling and we do not recommend them for new skirmishers. Things to watch out for if this is your first GBBR:

• The rifle cannot be put into "Safe" mode without first being cocked. Generally, the best way to store a GBBR is with the magazine removed, the rifle uncocked and the fire selector set to "semi". Do not force the selector into "Safe" when the rifle isn't cocked; this will damage the trigger group parts.
• The HOP-up adjuster for this TM ZET system GBBR is inside the upper receiver and is accessible through the magazine well using a flathead screwdriver when the bolt is locked open.
• GBBRs need to be cocked before the first shot, just like a GBB pistol. It is important that you do not double load a GBBR as this can break the nozzle. We recommend clearing the chamber of BBs with a cleaning rod in the event that you finish firing mid-magazine and the bolt does not lock back and show an empty chamber.
• GBBRs generally use higher pressure gas than GBB pistols due to the extra weight of the bolt. We recommend Green Gas (NUPROL 2.0, VORSK V6, ASG Ultraair) for general use and Red Gas (NUPROL 3.0, VORSK V8) for cold weather use.
• The faster you shoot a GBBR, the less accurate it will be. This is due to pressure variance as the gas reservoir cools down. Full auto is basically for fun, and these rifles run far better when used in semi-auto mode.
• Like a GBB pistol, GBBR magazines require maintenance. We recommend leaving a small amount of gas inside the magazine when stored, and not storing the magazines in a cold or damp environment. Magazine seals and valves will need lubrication and to be kept clear of dust and debris.