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MechTech Carbine

The CCU’s fit Glock frames that are Compact (G19, G23, G32), Standard (G17, G22, G24, G31, G34, G35) and Large (G20, G40, G21, G41). Mech Tech Uppers are not available for sub-compact Glocks. Generation doesn’t matter, but the front rail size does – see the picture and note below. Compensated and SF versions only affect the barrel/slide and grip size respectively, they will work just fine with the CCU. If you have a G31 or G32 you can only order the CCU in 9mm or 40S&W.

Glock magazines are interchangeable within the same frame size, and between the Compact and Standard sizes. This means, for example, that if you have a Glock 22 and want to shoot 9mm with your CCU, you can. Just purchase Glock 17 magazines. Compact magazines are too short to work in Standard frames. Here are the combinations that will work:

Your frame:      CCU Available in:

Compact                9mm, 40S&W

Standard               9mm, 40S&W

Large                    45ACP, 10mm

Again, make sure your magazine caliber matches the barrel caliber of your CCU.

This information is provided only to illustrate the flexibility of the Mech Tech CCU. (Caution: the foregoing does not imply that a Glock pistol designed for a given cartridge can safely shoot a different cartridge by simply switching the magazine – this is dangerous – do not try it! Likewise a CCU Upper can safely fire only the cartridge for which it is designed!) If further clarification is needed please contact MechTech Systems Inc.

Glock front rail top down large
If your early model Glock frame has a front tab length longer than the red line dimension then it will not fit our CCU. The tabs, metal and possibly plastic (as shown in the picture) are what engage the slot in the pistol’s slide. If your frame doesn’t have any plastic tab, just the metal tab, your frame will work.


If your early model Glock has only 1 pin instead of the 2 pins shown, the CCU feed ramp will not fit on the locking block in your pistol. Therefore, your pistol will not work with the CCU.

Aftermarket triggers. Sometimes aftermarket triggers, while they work fine with the pistol slide and barrel, don’t work with the CCU. The problem is not consistent enough to say that XYZ Trigger will not work with the CCU. Due to tolerance stacking your aftermarket trigger MAY not work with the CCU. The CCU is designed to work with factory triggers.

CCU vs Pistol Slide: There is no last round hold open with the CCU. With the CCU attached your pistol and drop safeties still work.

Cominolli Safety: The CCU and this manual safety do work together, however, they do interfere with each other a little bit. The Telestock will only fully collapse if the safety is off. In the on position the safety lever blocks the rod of the Telestock from moving forward.

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Deluxe Mech Tech Carbine Kit Item: MEC-K1 Manufacturer: Mech Tech $699.00
Mech Tech Carbine Kit w/M4 Stock Item: MEC-KM4 Manufacturer: Mech Tech $489.95
Mech Tech Carbine Kit w/Fixed Stock Item: MEC-FS Manufacturer: Mech Tech $424.95
Mech Tech Carbine Kit w/ Telestock Item: MEC-TELS Manufacturer: Mech Tech $469.95
Mech Tech Carbine Kit w/Stock Adapter Item: MEC-A Manufacturer: Mech Tech $424.95

In Stock

Manufacturer: Mech Tech $99.95
This is a standard, 6 position, M4 stock (shown fully collapsed) with the buffer tube mounted to the CCU using the adapter shown in the photo immediately below. The M4 Adapter comes with this stock and so is incuded in the price shown.

In Stock

Manufacturer: Mech Tech $34.95
Yes, it looks like an M4 adjustable stock. However, we have replaced the buffer tube with our own adapter to fix it in place.

In Stock

Manufacturer: Mech Tech $89.95
This is a 5 position telescoping stock shown fully extended and fully collapsed. It has a sling stud for mounting your own loop.

In Stock

Manufacturer: Mech Tech $34.95
This adapter attaches to the rear of the CCU housing. Many customers already own an M4 stock and buffer tube. The adapter accepts both military and commercial buffer tubes.
Mech Tech Butt Pad Item: MEC-BP

In Stock

Manufacturer: Mech Tech $14.95
This butt pad comes standard on our Telestock. It is also available for use on our M4 Fixed and M4 Adjustable stocks.
Feed Ramp for Glock Item: MEC-GBL In Stock
Manufacturer: Mech Tech $19.95
Feed Ramp for Glock (Compact) Item: MEC-GBM In Stock
Manufacturer: Mech Tech $19.95

In Stock

Manufacturer: Mech Tech $169.95
This tactical accessory mounting rail has the Mono Rail and 3 6.5? rails. This is the best mounting option for our Vertical Fore Grip. It replaces the Standard Rail and Molded Fore Grip.

In Stock

Manufacturer: Mech Tech $129.95
This kit includes the Mono Rail and gives you 3 short rails for mounting other accessories like a flashlight, sling loop, etc. It replaces the Standard Rail.

In Stock

Manufacturer: Mech Tech $89.95
Mini Quad – attaches to barrel providing 4 short accessory rails – very solid. This does NOT replace the standard rail, it aligns properly with it for an open front sight.
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