FREE SHIPPING & FREE RETURNS*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
Questions & Answers
Hello. Do I need a lock nut for this muzzle brake? Expert Answer

The JMac Customs 4C 5/8-24 4-Port Muzzle Brake does not include a crush washer. But It is recommended to use a crush washer or shim kit in order to properly time this muzzle device.

by Ethan, Gear Expert, July 27, 2022

We've got an AWESOME deal for you!

Blazin' Deal
Prices have been cut drastically on this product as part of a special offer. These prices are so low that there's no double-dipping with coupons or any additional discounts, but you'll still get the best deal out there. This offer won't last long, so don't miss out!
Color: Black Finish: Nitride Fabric/Material: 17-4PH Stainless Steel Threads per Inch: 5/8x24 Gun Make: Kalashnikov Length: 2.1 inWeight: 3.56 oz

Code: 4VI-BMB-JMC0357-RRD-4C-30

MPN: RRD-4C-30

Blazin' Deal
List: $119.95Save 13%
$104.18

Product Info for JMac Customs 4C 5/8-24 4-Port Muzzle Brake

The RRD-4C is a lightweight Muzzle Brake Compensator that not only reduces recoil by 20% and virtually eliminates muzzle rise but also REDUCES FLASH! This one of a kind combination device gives you control over your firearm like you've never had before while only adding 1.5" in length and 3.56 oz in weight! Caliber: 10mm bore will work with 5.56, 5.45, 7.62x39, 300BLK, 6.5 credemore, .308/762 nato, 7.62x54r, 7mm, 7mm Mag, 300 win, 9mm.image

made in specialized factories and counts as 1 922r compliance part. Compatibility: AR-10 type rifles, 300 BLK AR-15 type rifles, SCAR-17 Galil Ace Rifle and Pistol in x39 and .308. Bolt action rifles threaded in 5/8-24 with a bullet diameter no larger than .338Keltec RFB. Since the release of the original RRD-4, we have been tweaking the design to improve muzzle control and reduce weight. The RRD-4C has cut-outs on the top sides to allow gas to vent upwards in turn forcing the barrel downwards and virtually eliminating muzzle rise with an extremely low flash signature! Reduces flash on barrels 11" and longer. See how the RRD-4C compares to 28 other popular AK muzzle devices in Flash Reduction!

Specifications for JMac Customs 4C 5/8-24 4-Port Muzzle Brake:

Manufacturer: JMac Customs
Color: Black
Finish: Nitride
Fabric/Material: 17-4PH Stainless Steel
Threads per Inch: 5/8x24
Gun Make: Kalashnikov
Length: 2.1 in
Weight: 3.56 oz

Features of JMac Customs 4C 5/8-24 4-Port Muzzle Brake

  • 4 Port Muzzle Brake with KeyMount

Package Contents:

  • JMac Customs 4C 5/8-24 4-Port Muzzle Brake

JMac Customs 4C 5/8-24 4-Port Muzzle Brake Orderable Models

List of Orderable Models

JMac Customs 4C 5/8-24 4-Port Muzzle Brake, Black Nitride, Black, RRD-4C-30 , MPN: RRD-4C-30 , Code: 4VI-BMB-JMC0357-RRD-4C-30
Compare (0)