https://greyhive.com/videos/watch/71cf93b3-974b-4501-9c3c-925e80613c24 Is a factory-tuned 3-position AR pistol actually reliable right out of the box? Today we’re taking the One Horse 10.5" Express QUAD (equipped with the Atrius FRS) out to the range to see if this old-school GWOT-style quad rail build holds up without needing aftermarket buffer weights, spring swaps, or endless tinkering. Most high-rate-of-fire setups turn into a headache of bolt bounce and reliability issues. One Horse and Atrius teamed up to engineer, time, and test-fire this entire 10.5" 5.56 system from the factory so it runs flat and consistent from day one. We’ll break down the build specs, ergonomics, and how controllable it really is when you push the pace. Build Specs (One Horse 10.5" Express QUAD): Bullet Caliber: 5.56 NATO / .223 Bullet Barrel: 10.5" Medium Profile, 1:7 Twist, Carbine Gas System Bullet Handguard: 9.25" Picatinny Quad Rail Bullet Selector: Factory-Installed & Timed Atrius FRS (3-Position) Bullet Charging Handle: Breek Arms Warhammer Mod2 Ambi Bullet Grip: THRiL RTG (Rugged Tactical Grip) Bullet Muzzle Device: Standard A2 (1/2x28) Timestamps: 0:00 - Intro & The Problem With Custom Builds 1:15 - Tabletop Overview & Specs 3:40 - Range Testing & Controllability 6:20 - What Works & What Doesn't 8:10 - Final Verdict (Note: All firearms and accessories shown are completely factory-standard, legal, and operated on a closed, controlled range.) Fri, 13 Nov 2026 06:57:46 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://greyhive.com https://greyhive.com/lazy-static/avatars/5746210d-885d-44b2-9be0-92bf1e4d34df.webp https://greyhive.com/videos/watch/71cf93b3-974b-4501-9c3c-925e80613c24 All rights reserved, unless otherwise specified in the terms specified at https://greyhive.com/about and potential licenses granted by each content's rightholder.