ASK AN EXPERTDescription
- 5.56x45mm NATO caliber
- Direct impingement operating system
- 416SS, SBN barrel material
- Rifle gas port location
- Cmmg EML15 M-Lok hand guard
- Magpul MOE Rifle stock
- Mil-spec single stage trigger type
- Zeroed parts and accessories - Quality comes standard
- Cerakote standard finish
- Lifetime Quality Guarantee
There's a world of options when it comes to AR15s, and for those that want to reach out to further targets or hunt with 5.56, the Cmmg Endeavor Mk4 5.56x45mm Nato 18" Rifle (55AFDF3) is an awesome choice. Despite all the different caliber offerings available today for AR15 pattern rifles, 5.56x45mm still stands as one of the most popular.
Built on Cmmg's Mk4 - AR15 platform, this ENDEAVOR can make use of just about any AR15 compatible component, like custom trigger groups, and utilizes a nitride-finished 18-inch 416 stainless steel barrel for enhanced ballistic performance.
Each Cmmg ENDEAVOR rifle is purpose-built for long-range performance, with everything from the Magpul MOE rifle stock to the ZEROED muzzle brake, and every part in between selected for its utility to the avid marksman.
The EML 15 handguard maximizes customization potential. M-LOK attachment slots at the 12, 3, 6, and 9 o'clock positions give you plenty of real estate to mount accessories, while the Picatinny rail sections allow for easy and solid mounting points for sights and accessories.
The AR15 platform is well known for its capability for customization but picking the right parts doesn't have to be a nightmare of homework. Cmmg's ZEROED parts and accessories are made here in the USA with quality and attention to detail that is second to none and each ENDEAVOR comes equipped with a slew of ZEROED parts standard, including: ZEROED Pistol Grip, ZEROED Trigger Guard, ZEROED 60 degrees /90 degrees Ambi Safety, ZEROED AR15 Ambi Charging Handle, ZEROED Ambi Mag Catch, ZEROED Extended Mag Release Button, ZEROED AR15 Bolt Catch, ZEROED AR15 Polymer Dust Cover, ZEROED Muzzle Brake 5.56mm.
Warranty Information
| Platform | Mk4 |
| Caliber | 5.56x45mm NATO |
| Operating System | Direct Impingement |
| Barrel Twist | 1:7 |
| Barrel Contour | MT |
| Barrel Material | 416SS, SBN |
| Muzzle Device | Zeroed Muzzle Brake 5.56 |
| Muzzle Thread | 1/2 x 28 |
| Gas Port Location | Rifle |
| Gas Block | 0.750" Non-Adjustable |
| Upper Receiver | Billet 6061 T6 Aluminum |
| Lower Receiver | Mk4 Forged 7075 T6 |
| Hand Guard | Cmmg EML15 M-Lok |
| Finish | Cerakote Standard |
| Charging Handle | Cmmg Zeroed Ambi |
| Pistol Grip | Cmmg Zeroed Pistol Grip |
| Buffer Type | AR15, Rifle / AI |
| Receiver Extension | Cmmg A1 Extension |
| Stock / Brace | Magpul MOE Rifle Stock |
| Trigger Type | Mil-Spec Single Stage |
| Trigger Guard | Cmmg Zeroed Trigger Guard |
| Safety Selector | Cmmg 60/90 degree |
| Magazine | Magpul 30rd Pmag |
| Barrel Length, in | 18" |
| Length, in | 37.8" |
| Weight, lbs | 7 |
