Colt’s Early Commercial AR-15s: SP1 and the A2 Drift
A collector’s look at Colt’s SP1 and early Sporters, from slickside uppers and pencil barrels to the rollmarks and small changes that hinted at the A2 era.
Tag: Ar-15
Twist Rates Decoded: Greenhill, Miller, and Picking the Right Barrel
Still staring at 1:7 vs 1:8? This plain-English twist guide shows when Greenhill works, what Miller adds, why bullet length beats weight, and how to match a barrel to your loads.
AR Receivers Explained: Forged vs. Billet vs. Monolithic, Tolerances, and What Actually Matters
Stuck between forged, billet, or monolithic AR receivers? Here’s a clear, purpose-first guide to strength, tolerances, materials, weight, and what actually changes how your rifle shoots.