The MR762 A4 represents Heckler & Koch's newest iteration of their premium 7.62 NATO semi-automatic rifle for the civilian market. Building upon the proven HK417 design, this enhanced version delivers uncompromising reliability with fully ambidextrous controls, a lighter weight profile, and the battle-tested short-stroke gas piston system that has made the platform legendary among serious shooters.
The MR762 A4 is the direct civilian descendant of the HK417, utilizing the proprietary HK short-stroke gas piston system. This system keeps the receiver, bolt, and trigger components remarkably clean during operation, maintaining peak performance even under adverse conditions.
The cold hammer-forged barrel is produced using the highest quality cannon-grade steel, delivering superior accuracy even after thousands of rounds. With a 1:11" twist rate and four-groove rifling pattern (without chrome lining), this match-grade barrel is optimized for precision shooting while maintaining tactical versatility.
New for the A4 version is a tensioning buffer that improves fit between upper and lower receivers, and a redesigned magazine well angle for enhanced reliability with various magazine types. The rifle features HK's latest slim-profile aluminum handguard with M-LOK attachment points, ensuring the barrel remains truly free-floating for maximum accuracy.
The MR762 A4's ambidextrous controls allow for easy operation by left or right-handed shooters, with the safety lever featuring a 45-degree throw for quick manipulation. Like its military counterparts, the rifle utilizes HK's proven two-stage match trigger for precise shot control.
Military heritage is evident throughout the design. Versions of this platform serve with elite special operations units worldwide, and the US military employs the 7.62 NATO variant as the M110A1 Compact Semi-Automatic Sniper System (CSASS). This civilian model benefits from the same engineering excellence and attention to detail.
The MR762 A4 is assembled at Heckler & Koch's American manufacturing facilities using both German and American-made components, meeting strict quality standards while complying with US import regulations. This combination ensures the rifle maintains HK's legendary durability while being legally available to American shooters.
This rifle represents the ultimate expression of AR-platform engineering in 7.62 NATO, combining HK's legendary durability with enhanced ergonomics and capability. For shooters who demand uncompromising performance and reliability, the MR762 A4 delivers the premium German engineering and American manufacturing excellence that has made Heckler & Koch a standard-bearer in tactical firearms.
| Specification | Details |
|---|---|
| Caliber | 7.62x51mm NATO |
| Operating System | Short-stroke gas piston |
| Overall Length | 35.5-39.5 inches (adjustable) |
| Overall Height | 7.75 inches |
| Overall Width | 3.23 inches |
| Barrel Length | 16.5 inches |
| Barrel Profile | 4 lands & grooves, 1:11" right-hand twist |
| Muzzle Thread | 5/8"-24 |
| Picatinny Rail Length | 23 inches |
| Weight (without magazine) | 9.84 lbs |
| Magazine Weight | 0.50 lbs |
| Magazine Capacity | 20-Round (included) |
| Controls | Fully ambidextrous |
| Handguard | M-LOK with QD sockets |
| Gas System | Adjustable for suppressed/unsuppressed use |
Buying and shipping through Charlie’s is easy, but there is some information you need to know. This item must ship to FFL holder. No civilian exceptions.
1) Check your state laws to make sure the federally regulated item you want to purchase is legal in your state.
2) Find your FFL… Have your dealer send us a copy of their FFL to Charlie’s (Make them earn their fee!!!)
3) Be patient! You should hear from our compliance department within 3-4 business days. If not, feel free to reach out for a status update.
For California purchases, be sure to also purchase the CA Compliance Service, but you need to do that in a separate order.
That’s it! We try to make this process as simple as possible for our customers. Please click the “Buying a Firearm” tab at the top of this page for more information.
NOTE: The free shipping option does not apply to full rifles
THIS IS A SERIALIZED FIREARM. It must ship to a Federal Firearms License holder. No civilian exceptions.
Buying and shipping through Charlie’s is easy, but there is some information you need to know. Only a federally licensed firearms dealer may receive a firearm or federally regulated serialized item (like a receiver or suppressor). We cannot ship these items directly to you. Please follow these steps to process your transaction:
1) Check your state laws to make sure the federally regulated item you want to purchase is legal in your state. Your FFL dealer should be able to give you all of the necessary information regarding your state specific laws. But, if we ship to your FFL, and there is a legal issue, we cannot accept a return. So please make sure that you know and follow your local and state laws.
2) A quick google search will show you what Federal Firearms Licensed (FFL) dealers are in your area. When you are ready to purchase, contact the FFL dealer you would like to use and get their shipping address. During the check-out, put YOUR address in the “billing” section and the FFL DEALER’S address in the “shipping” section. If you don’t know your FFLs address, that’s okay. You can send the information later.
3) After check out, make sure to contact your FFL dealer to ensure they will receive your shipment for you (most do this for a small fee, but you should always double check).
4) Have your dealer send us a copy of their FFL to FFL@CharliesCustomClones.com. Charlie’s does not reach to your FFL (MAKE THEM EARN THEIR FEE!!!)
5) Be patient! In order to ensure we remain compliant with all federal laws, our compliance department is kept separate from our sales and operations team. Please allow a few days for our compliance officer to verify all of your dealer’s documents and ensure all federal laws are being observed. You should hear from our compliance department within 3-4 business days. If not, feel free to reach out for a status update.
That’s it! We try to make this process as simple as possible for our customers, but if you are unfamiliar the process or have any other questions, please visit our How to Buy a Firearm page for more details.
California and New York residents please, click here. The process may be different due to state specific laws.
NOTE: The free shipping option does not apply to full rifles, unless purchased with a riflescope. If you choose free shipping at check-out, we will bill you for shipping later.
Heckler Koch
Heckler Koch
