The CMMG DefCan 3 Bi-Lock QD flash hider is the 7.62mm (.30 caliber) member of the DefCan family, threaded 5/8×24 for .308-pattern rifle barrels. It allows quick, secure attachment or removal of DefCan suppressors. Used on its own, it limits muzzle rise for faster follow-up shots and reduces the loss of night vision in low light. DefCan flash hiders are not cross compatible, so the DefCan 3 version is the one to pair with a DefCan 3 suppressor. It suits a rifle owner who wants a flash hider now and a suppressor mount later.

Key Specifications

• The caliber is .30 caliber (7.62mm/.308), the bore size this DefCan 3 version is made for.
• The thread is 5/8×24, the pitch your barrel has to be cut to.
• The interface is Bi-Lock QD, which lets a DefCan suppressor attach and detach quickly.
• The finish is black, a low-glare look that matches most rifles.
• On its own it works as a flash hider, reducing muzzle rise and the loss of night vision in low light.

Frequently Asked Questions

Is the DefCan 3 flash hider interchangeable with the DefCan 9 version? No. DefCan flash hiders are not cross compatible, so choose the one that matches your suppressor model. This one is the DefCan 3 for 7.62mm (.308) with 5/8×24 threads.

What thread does it use? It is threaded 5/8×24.

Buy the CMMG DefCan 3 Bi-Lock QD Flash Hider, .30 Caliber, 5/8×24

Match the 5/8×24 thread on your .308 barrel and the DefCan 3 flash hider is ready to mount. Shop CMMG and more AR muzzle devices at our Lubbock, Texas gun shop for fast, direct shipping.