CMMG’s M4-LE 5.56mm (left) with Laser Devices Dual Beam Aiming Laser-Advanced2 and M4-LE22 .22 LR (below), both equipped with EOTech EXPS HWS units, make for an ideal tactical/training combo.

CMMG 5.56/.22 LR M4S

If there were ever a rifle that could be truly…

If there were ever a rifle that could be truly called “America’s Rifle,” the AR-type rifles and carbines designed by Eugene Stoner and Jim Sullivan some 50 years ago fit the definition “to a T.” Because of its longevity, popularity and versatility, the AR has evolved into a rifle that truly can be said to be the most versatile firearm ever invented.

The original rifle was designed as a 300-yard rifle, but recent versions can “reach out and touch someone” out to 800 yards or more. AR-type rifles and carbines have become truly modular, although we know from conversations with Jim Sullivan that the original AR was never envisioned to become what it is today. The AR can be transformed simply by swapping upper receivers. It is even possible to switch calibers by changing uppers, as with the .50 Beowulf, 6.5 Grendel and 6.8 SPC.

A true cottage industry has developed for manufacturing custom-built ARs, catering to specialized customers. These manufacturers produce AR-type rifles and carbines, ranging from entry-level guns to very expensive full-custom rifles. One of the mainstays of the AR market is CMMG, a well-established and innovative manufacturer of AR-type rifles and carbines. They offer a complete variety of firearms to suit the needs of just about any user, from varmint hunter to SWAT team member, in either semi-automatic or select-fire.

The M4-LE22 employs a mag adapter for use of .22 mags and features a bolt stop that locks the gun open when empty.

The M4-LE22 employs a mag adapter for use of .22 mags and features a bolt stop that locks the gun open when empty

For military and LE units that employ M4-type carbines, the matched pair of .223 and .22 LR carbines tested for this article are for operational and training use and have an identical manual of arms. When training with the .22 LR carbine, there is nothing new to learn. Like the .223, the .22’s bolt locks back after the last shot is fired. When a fresh magazine is inserted, the user hits the bolt release, just like the larger caliber version. Having identical manual of arms for both training and operations cannot be overemphasized. When operating under the stress of conducting an entry, or in a tactical operation with potential for “bad guys” to be returning fire, one’s duty weapon must function exactly the same as the training weapon because under stress, you will fight the way you have trained. If you must use a different manual of arms for training and operations, you may well be setting yourself up for some unpleasant surprises. With that in mind, let’s first look over CMMG’s .22 LR carbine.

The CMMG M4 pair offers the LE officer an ideal duty weapon and matching training weapon.

CMMG’s M4-LE 5.56mm (left) with Laser Devices Dual Beam Aiming Laser-Advanced2 and M4-LE22 .22 LR (below), both equipped with EOTech EXPS HWS units, make for an ideal tactical/training combo.

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  • Tom

    Review, review, review. I have read so many reviews, but very few articles where a weapon AR-15 has been placed under abusive conditions as mud, dirt, sand, water, salt water, freezing heat, being dropped from various positions. One. Just one so far have I read articles regarding the torture a weapon has been put through and survived without a hic-up and that is the CMMG M4 LEPII. It was even shot several times with a 12 ga. shotgun and continued to perform by chewing up three 30 roound clips. Do you know of any other AR that’s been abused in this nature and stood up to the punishment. H&K is the only one so far that I have seen fired underwater, the CMMG Inc has not demonstrated its ability to fire under water, but it has been drowned, emptied and fired o.k. I am in my second month and the only other AR that is coming close to the CMMG is LWRCI. Can you guide me to material that evaluates weapons under adverse conditions? I have been researching for nearly 8 weeks trying to make a decision. Thus far CMMG Inc is leading the pack, but I like the LWRGI because it does not use a chrome doused barrel channel because the tolerance cannot be controlled. They use another process where the material is lain to within .0001 of an inch. Any assistance you can provide me will be helpful.
    Thank you for your time and your patients with me.

    REspectfully
    Tom
    Michigan