JMac Customs RRD-4C "30" (5/8 x 24) Muzzle brake/compensator
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$79
MSRP
$79
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Updated
Aug 26, 2026
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Specifications
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Description
JMac Customs RRD-4C "30" (5/8 x 24) Muzzle Brake/Compensator
Material: Military Grade 17-4PH Stainless Steel
Length: OAL 2.1"(53.4mm), Added length 1.5" (38.1mm)
Weight: 3.56 oz, 101 grams
Finish: Matte Black Nitride
Caliber: .360" bore will work with 5.56, 5.45, 7.62x39, 300BLK, 6.5 credemore, .308/762 nato, 7.62x54r, 7mm, 7mm Mag, 300 win
Manufactured in the US and counts as 1 922r compliance part
7.62 crush washer included
The JMac Customs RRD-4C is a lightweight Muzzle Brake Compensator that not only reduces recoil by 20%. It also virtually eliminates muzzle rise and, 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!
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 .338
Keltec RFB
If you are unsure about compatibility with your firearm send an email to [email protected]
Since the release of the original RRD-4, JMac Customs has been tweaking their designs 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
