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Questions & Answers
Customer Reviews
Helpful Positive Review Great brake by Ray, Verified Owner, September 10, 2023
Solid product per usual when buying JMac. The brake works flawlessly to reduce recoil and allows Keymo capable devices to connect quickly. While shooting I did not notice any flash. The brake is on the long side but I have it on a 18” SPR so OAL does...
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1/1 found this helpful
Most Recent Reviews JMAC really designed this muzzle brake for recoil reduction. by JAVI50L, Verified Owner, September 5, 2024
JMAC really designed this muzzle brake for recoil reduction. The difference between the stock A2 birdcage and the JMAC RRD-4C is like day and night during rapid fire or double taps. It will affect your zero after installation, plus is a key mount sup...
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Read All 2 Reviews

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: 1/2x28 Gun Make: Kalashnikov Length: 2.82 inWeight: 3.84 ozCondition: New

Code: 4VI-BMB-JMC0356-RRD-4C-28S-KM

MPN: RRD-4C-28S-KM

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

Product Info for JMac Customs 4C 1/2-28 4-Port Muzzle Brake w/ KeyMount

(R)ecoil (R)eduction (D)evice (4) ports (C)ompensator (28) 1/2x28 threads (S)houlder (KM) KeyMount.image

The 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 on standard shoulder mount style barrels (factory muzzle device installed with crush washer) and can be permanently attached using the (optional) pin.

Specifications for JMac Customs 4C 1/2-28 4-Port Muzzle Brake w/ KeyMount:

Manufacturer: JMac Customs
Color: Black
Finish: Nitride
Fabric/Material: 17-4PH Stainless Steel
Threads per Inch: 1/2x28
Gun Make: Kalashnikov
Length: 2.82 in
Weight: 3.84 oz
Condition: New

Features of JMac Customs 4C 1/2-28 4-Port Muzzle Brake w/ KeyMount

  • 4 Port Muzzle Brake

Package Contents:

  • JMac Customs 4C 1/2-28 4-Port Muzzle Brake w/ KeyMount

JMac Customs 4C 1/2-28 4-Port Muzzle Brake w/ KeyMount Orderable Models

List of Orderable Models

JMac Customs 4C 1/2-28 4-Port Muzzle Brake with KeyMount, Black Nitride, Black, RRD-4C-28S-KM , MPN: RRD-4C-28S-KM , Code: 4VI-BMB-JMC0356-RRD-4C-28S-KM

JMac Customs 4C 1/2-28 4-Port Muzzle Brake w/ KeyMount Unavailable & Discontinued Models

List of Unorderable Models

USED, JMac Customs 4C 1/2-28 4-Port Muzzle Brake with KeyMount, Black Nitride, Black, RRD-4C-28S-KM , MPN: RRD-4C-28S-KM-EDEMO , Code: 4VI-BMB-JMC0356-RRD-4C-28S-KM-EDEMO-RE-B
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