Moving on with the compression components, the normal brass cylinders have been removed and replaced with a stainless steel bore up cylinder for better compression and seal. In conjunction, the piston head has bearings to reduce spring tension over time prolonging spring life. One of the main drivetrain components, the piston, has been reinforced for durability. The stock inner barrel has been replaced with a 6.03mm tightbore barrel for better accuracy and range. The new high torque motor offers a much better trigger response as well as rate of fire. Instead of the old style 7mm bearings, Classic Army has now added 9mm bearings along with a quick release spring guide allowing the user to adapt to certain fields by quickly changing the muzzle velocity. However, what sets this airsoft gun apart from others is the newly redesigned gearbox.
This airsoft gun features a metal upper and lower receiver as well as an exquisitely laser engraved Colt real logo and individual serial number. The M15A4 SPR Rifle is one of the newest designs by Classic Army. Through their years of experience and knowledge, Classic Army has developed their creed of Total Performance Since inception, Classic Army has been an innovator in design and production of Airsoft guns for the collector and wargamer market, offering a wide selection of products to suit their customers' tastes and needs. Classic Army was the first to introduce a high-end SCAR AEG. Classic Army built the first glass-filled nylon fiber AEG in their G36.
Classic Army produced the first full metal production M4 and MP5 AEGs. Classic Army is a leading manufacturer of Airsoft products, setting standards for the entire industry.