+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
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.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

JMac Customs 4C 5/8-24 4-Port Muzzle Brake w/ KeyMount RRD-4C-30S-KM Color: Black, Finish: Nitride, 13% Off Plus Blazin' Deal w/ Free S&H

JMac Customs 4C 5/8-24 4-Port Muzzle Brake with KeyMount, Black Nitride, Black, RRD-4C-30S-KM
JMac Customs 4C 5/8-24 4-Port Muzzle Brake with KeyMount, Black Nitride, Black, RRD-4C-30S-KM
1 of 1 images
JMac Customs 4C 5/8-24 4-Port Muzzle Brake with KeyMount, Black Nitride, Black, RRD-4C-30S-KM

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
Questions & Answers
Customer Reviews
Helpful Positive Review Excellent Fit and finish by Southpaw, Verified Owner, January 21, 2023
I was initially concerned that this product may not fit a LR -308 patterned rifle, I contacted JMAC customer service and they confirmed within a few hours of my email that it does fit my LR-308, with the 5/8 X 24 patterned sold here. Excellent price...
Read More...
4/4 found this helpful
Most Recent Reviews owner of the muzzle brake by steve, Verified Owner, January 29, 2025
this one I will recommend for every one it’s very excellent, I use this for my b&t spr300 pro to try it out , after trying it out it’s nothing bad about this muzzle it’s perfectly for my b&t spr300blk
Read All 2 Reviews

We've got an AWESOME deal for you!

See more Blazin' Deal items
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: 2.82 in

Code: 4VI-BMB-JMC0358-RRD-4C-30S-KM

MPN: RRD-4C-30S-KM

Blazin' Deal
List: $129.95Save 13%
$112.87

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

(R)ecoil(R)eduction(D)evice(4)ports(C)ompensator(30)5/8x24(S)houlder(KM) KeyMountThe best of both worlds! Our super effective RRD4-4C muzzle brake comp with KEYMO suppressor mount!These are designed to install with a shim kit (optional) on standard shoulderimage

mount style barrels (factory muzzle device installed with crush washer) and can be permanently attached using the pin (optional).Threads: 5/8-24Length: 2.82" longMaterial: 17-4ph StainlessWeight: 3.28ozKeymount & X-Series Suppressor Compatibility

JMac Customs is NOT responsible for improper installation of this muzzle device or any damage to the suppressor using this device. We recommend this be professionally installed and checked to ensure alignment.This is a licensed product through Dead Air Silencers.

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

Manufacturer: JMac Customs
Color: Black
Finish: Nitride
Fabric/Material: 17-4PH Stainless Steel
Threads per Inch: 5/8x24
Gun Make: Kalashnikov
Length: 2.82 in

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

  • 4 Port Muzzle Brake with KeyMount

Package Contents:

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

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

List of Orderable Models

JMac Customs 4C 5/8-24 4-Port Muzzle Brake with KeyMount, Black Nitride, Black, RRD-4C-30S-KM , MPN: RRD-4C-30S-KM , Code: 4VI-BMB-JMC0358-RRD-4C-30S-KM
Compare (0)
1 item has been added
Add at least two items to compare