AR-15 Rifle Quad Rail Forend (2 Piece) provide a slim profile for a more comfortable, handguard-like feel. Both models replacehandguards with no modifications to the weapon. A vent-hole design ...

and SLR104-58R are available with the new Arsenal Quad Rail Handguard. The Arsenal Krink Quad Rail is designed and manufactured to exceed the most stringent military specifications and requirements.

As a result, the Picatinny was adopted by the military for its infamous quad-rail handguards for its AR-platform firearms, and law enforcement soon followed suit. Today, Pic rails are still everywhere ...

Both the M4 and the M16A4 feature “quad” Picatinny rail handguard systems made by Knight’s Armament Company that have remained in use since they were introduced in the early 2000s.

The barrel is surrounded by the company's redesigned, free-floated quad-rail handguard, a feature specifically requested by several law-enforcement agencies. The fore-end features full-length ...

And the monolithic upper weighs less than a standard upper receiver with separate quad-rail handguard attached. The upper, made from a CNC-machined 7075-T6 aluminum forging, features integral top ...

The quad rail handguard of the original M110 is gone in favor of an M-LOK handguard, though the M110K1 M-LOK handguard has an integral Picatinny rail at the bipod attachment point. This is ...