Radian Weapons Ramjet & Afterburner SIG P365 9mm 3.7" Stainless Steel Barrel Combo - Black/Gray

The Radian Weapons Ramjet + Afterburner combo pairs a match-grade drop-in barrel with an ultra-compact micro-compensator, purpose-built for the Sig Sauer P365 3.7" slide. Together they deliver class-leading recoil control and accuracy potential in a concealed-carry-friendly package, letting a carry pistol run flatter and shoot tighter groups without permanently modifying the host firearm.

The Ramjet barrel is machined from 416R stainless steel and finished in Radian's signature Radianite (Gray PVD), giving it a distinctive two-tone black over gray appearance with excellent corrosion resistance. The fluted profile lightens the muzzle end and helps the barrel lock up cleanly in the P365 slide. Chambered in 9mm Luger, the Ramjet is engineered for match-grade accuracy potential.

The Afterburner compensator is just .47" long, yet ports muzzle gas to reduce felt recoil by up to 44% when running 115-grain ammunition. It indexes to the Ramjet via Radian's INTRA-LOK mounting system, which creates a secure, vibration-resistant lock between the barrel and compensator without threads, pins, or thread-locking compound. Because the system is threadless, the compensator can be installed or removed in seconds for deep cleaning or for low-profile carry without tools.

This is a turnkey upgrade for SIG P365 owners who want faster split times, a softer-recoiling pistol, and a more refined shooting experience straight out of the box.