The PTR VENT 3 5.56x45mm suppressor is PTR’s lightweight, full-size 5.56 can, a monolithic 3D-printed titanium structure built with Purposely Induced Porosity (PIP) technology (brand part no. V3-5560101). Rather than relying only on restrictive baffles, PIP routes expanding gas through controlled porous structures, which helps cut back pressure, gas at the shooter’s face and port signature on semiautomatic 5.56 rifles. At 7.75 inches and 11.75 ounces without the mount, it keeps a full-size can’s volume without much weight at the muzzle. PEW Science recorded a Suppression Rating of 42.6 on its untuned 10.3-inch MK18 host with Federal XM193.

Key Specifications

• PTR lists the calibers as 5.56x45mm NATO and 5.7x28mm.
• The minimum barrel length is 10.5 inches for 5.56x45mm, with no minimum specified for 5.7x28mm.
• Length is 7.75 inches without the mount, a full-size length for a rifle can.
• Weight is 11.75 ounces without the mount, which keeps an AR light up front.
• Diameter is 1.625 inches, so confirm clearance inside your handguard.
• Construction is a monolithic 3D-printed titanium body with a strong strength-to-weight balance.
• The finish is black with PTR’s proprietary internal and external coating.
• The mount is a 1-3/8×24 HUB interface, the industry-standard thread for compatible mounting systems.
• A 1/2×28 direct-thread adapter is included for conventional 5.56 muzzles.
• PTR rates it full-auto capable for limited use within PTR’s specified firing schedule.

Frequently Asked Questions

What is the minimum barrel length? PTR specifies a 10.5-inch minimum for 5.56x45mm and no minimum for 5.7x28mm.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for suppressors. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply.

How does it do on a short rifle? PEW Science recorded a composite Suppression Rating of 42.6 on a 10.3-inch MK18 with XM193 and noted low back pressure, a demanding test for any 5.56 suppressor.

Buy the PTR VENT 3 5.56x45mm Titanium Suppressor

As of October 9, 2026, this suppressor transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through PTR‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.