A 4″ free floating handguard is a compact rail system designed for AR-15 pistols and short-barreled rifles (SBRs) with very short barrels, typically 7″–8.5″. It attaches directly to the upper receiver, not the barrel, improving accuracy by eliminating barrel contact. The 4″ free floating handguard works with compatible AR-15 upper receivers, low-profile gas blocks, gas tubes, and short barrels. It provides a lightweight, stable platform for mounting accessories, making it ideal for ultra-compact, maneuverable AR builds.
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