Click on pictures to enlarge




FOR NEW ORDERS ONLY - Accessory rails are factory installed.

The 1911 CCU’s are available in the following calibers:
40 Smith & Wesson, 45 ACP & 460 Roland


Frame Size Compatibility: The only concern regarding what will fit and what will not fit is the length of the frame's dust cover. There are a few frames which have dust covers longer than a standard Government model and these may not fit the CCU. Commander and Officer models will work so long as the dust cover is not more than 1/2" shorter than it is on the Government model. Double stack magazine models work fine as long as the rails/trigger/hammer are all standard 1911 spec. Double Action "1911s" do NOT work with the CCU.


NOTE: Factory Loaded Ammunition Only. MechTech recommends only using good quality factory loaded ammunition in the CCU. The CCU is a blowback operated action and is capable of safely firing ammunition up to +P. DO NOT USE +P+ or 'hotter' loads.

1911 NOTES

There is a certain 'juggling' of calibers relative to the CCU Upper of which one may take advantage. The 1911 pistol frame is designed to accept 1911 magazines of several different calibers. The proper magazine for your pistol is of course that for which the slide and barrel is designed. The fact that a 1911 magazine of a different caliber will function in the 1911 frame (when the frame is separated from the slide and barrel) allows one to order a CCU chambered for a cartridge different from that of the assembled pistol's frame you plan to use with the CCU Upper. Example: you have a 1911 which is designed to fire 40 S&W cartridges but you would really like to have a CCU in 45 ACP. You can then order a 1911 style CCU Upper chambered for the 45 ACP cartridge and use the frame from your 40 S&W pistol with that CCU. You will need to acquire a 45 ACP 1911 style magazine and use it only when using the 45 ACP CCU on your pistol. Caution: this does not mean that you can use your 1911 pistol to safely fire a cartridge other than that for which it is designed by simply switching magazines - don't try this - it is dangerous! The barrel and slide of a 1911 pistol is designed for a specific cartridge and only that cartridge is safe to use when the pistol is assembled. Likewise, a CCU used with a 1911 pistol frame (lower unit) can safely fire only the cartridge for which the CCU is designed! This information is provided only to illustrate the flexibility available for 1911 style pistol frame and CCU combinations. Again - your pistol should be used only with the cartridge for which it is designed and a pistol/CCU combination must be used only with the cartridge for which the CCU Upper is designed. If further clarification is needed contact Mech-Tech Systems Inc.

Last Round Hold-Open - there is no last round hold-open function on the CCU.

Safety Lever - only the original GI style safety will function with the 1911 CCU. Extended and ambidextrous safeties will not function as a safety but the CCU will function and fire in all other respects.

The "Lower Unit"

To the left: a 1911 frame (also called 'lower unit') ready to install into a CCU Upper. No modificatons to the frame are needed! Complete lowers only are readily available available from many sources. This allows a user to have a dedicated lower for their CCU. Particularly for 1911's there are many sources for all internal components and naked frames allowing the more adventurous to build a dedicated lower for their CCU's the way they want it. None of the 1911 upper components are needed.
CCU for 1911 (click any image to enlarge)

M4 Stock Adapter CCU $434.90

M4 Fixed Stock CCU $434.90


M4 Adjustable Stock CCU $499.90

Telestock CCU $489.90

One of these is the starting point to design your customized CCU. Each comes with a 6" Standard Rail and Molded Fore Grip. If you have your own M4 stock, buffer tube, castle nut and lock ring, our M4 Adapter will accept both commercial and Mil-Spec tubes. Every unit is test fired before it ships. Other rail choices are available which may replace the Standard Rail/Molded Fore Grip. All of our rails are Picatinny. Choose from our ACCESSORIES page to customize your CCU.


Certain 1911 style pistols such as the Paraordnance line have modified receivers which leave an opening in the magazine well in an area critical to proper feeding when these pistols are used with a CCU. Mech Tech has designed an insert called a 'Para Block' which solves the problem. Frames with 'ramped barrels' can be used with the CCU by installing the 'Parablock'. The photos below illustrate the difference between a 'standard' barrel (left photo) and a 'ramped barrel' (right photo).


NOTE: 'COLT' is a registered trade name and is in no way affiliated with Mech Tech Systems Inc. There are many other manufacturers of 1911 style pistols and the fact that Mech Tech Systems Inc. provides the CCU system as an accessory item for these pistols is in no way intended to imply that any of these manufacturers endorse or are associated with Mech Tech Systems Inc.