The one-piece adapter ARF135F155 from Rusan for the Pulsar Forward attachment is made of high-quality aircraft aluminum. The one-piece construction gives the Rusan ARF135F155 adapter a very high load capacity with a low weight. The ARF135F155 adapter is equipped with a quick-release lock with adjustable locking force, which allows quick and easy mounting and dismounting of the adapter / attachment. The adapter is attached to the Pulsar Forward by means of a bayonet catch with 4 pins. The Rusan ARF adapter creates a perfect connection between the attachment and a day optic, thanks to a special coating no plastic inner rings are necessary and there is no damage or mounting marks on the scope. Due to the perfect fit and the special inner coating, the adapter stays in place, even with high recoil. The Rusan adapter ARF135F155 was tested up to caliber 338 Lapua Magnum. This Rusan adapter is available in different sizes (see above) and can be adjusted by ± 0.2 mm in diameter.