Dead Air Primal. .45 caliber rifle-centric multi-purpose silencer optimized for .458 SOCOM, .45-70, .450 Bushmaster, and similar. Also usable as a handgun silencer with SD500 booster assembly. Compatible with direct thread, KeyMo, Xeno, 3-lug, and SD500 mounting systems. Rated for calibers from .338 Lapua down to light-duty pistol calibers. Includes 5/8-24 thread insert, HUB to P-Series adapter, and wrenches. Note: If this product is reflected as in-stock it means it's either physically in-stock or allocated and available (serial number is assigned) at my distributor