One Horse Express FRS Pistol | OHUB News Cory Ross 08.05.26The One Horse Express rifle is the first factory-tuned rifle with an FRS included. Introducing the One Horse Express pistol. The standard specs are as follows:Model(s): One Horse Express Pistol (M-LOK) (Quad Rail)Caliber: 5.56 NATOCapacity: 30Operation: Direct Impingement (Carbine Length)Sights: N/AMagazines: 1Barrel Length: 10.5”Thread Pitch: 1/2×28Weight: 7.14 lbs. The Express Pistol MLOK has a 9.25-inch handguard with seven-sided M-LOK compatibility, dual QD sling points, and an SB Tactical SBA3 stabilizing brace. The Express Pistol Quad Rail replaces this with a 9.5-inch rail featuring four full-length 1913 Picatinny rails, lightening cuts, and an SB Tactical SBA5 brace.