Madbull first gave you the PRI GEN III DELTA Handguard. Now it is welcoming the round rail into its family. If you are into small arms history, you must have heard of SPR (Special Purpose Rifle.) The SPR, used by Special Operations Forces of both the U.S. Army and U.S. Navy, is a heavily modified light sniper/designated marksman variation of the AR-15/M16 line of infantry weapons, and is chambered for NATO standard 5.56x45mm ammunition. The first SPR adopted famous PRI Gen I and Gen II carbon-fiber free-float handguard. Now, MadBull is proudly introducing fully licensed PRI handguard rails to Airsoft industry. One very important feature of PRI handguard is its carbon fiber main body. The carbon fiber can stop heat transfer from barrel to the handguard. Now this same handguard can be yours to get that classic SPR look on your gun. It has a light weight frame that is solid because of the carbon fiber construction. It comes with adjustable Picatinny rails to accessories. And it’s fully licensed by PRI.