The FR-16 RPR series uses AR-15 pattern receivers with Radical Firearms' RPR series handguards. The RPR handguard features M-LOK slots at the 3, 6 and 9 o'clock positions for attachment of grips, bipods, lights and other accessories while retaining a full-length 1913 Picatinny top rail for mounting sights, switches and laser aiming devices. This model is chambered in 7.62x39mm and includes a pistol grip and BRAVO stock manufactured by B5 Systems. One 10-round magazine included.