These are followed by the non-railed AR15 handguards or better known as "free float tubes" while the free float rails are available in many different lengths and configurations the most popular is standard quad rail AR15 handguard - named for its 4-Picatinny rails. Similar to the previous category, there are free floating railed AR handguards as the most popular type of free-floating forehands. The free-floating handguard is mounted directly to the upper receiver without making any contacts with a barrel, allowing it to "float" and transfers better harmonics, resulting in slightly better accuracy.
The other principal category consists of free-floating handguards intended to provide better precision and can be seen on match-grade rifles that value accuracy above all else. That forends usually have from one to four attachment points at three, six, nine and twelve o’clock positions and the most common type are the quad-rails, featuring the four rails that generally run the length of the handguard, enabling mounting of all different kinds of AR 15 accessories such as lights, Harris bipods or vertical grips. If we choose a railed handguard that means the rifle will utilize some combinations of Picatinny rail, (known as a MIL-STD-1913 rail), Keymod or M-LOK mounting rails. Furthermore, both categories are subdivided on the rail, and the non-railed handguards and finally, as the cherry on the cake, all of these types could be made either of all metal construction, or carbon fiber reinforced polymers. Moreover, the AR15 forends could be classified by its way of installation on a classic drop in (non-free-float design) and free-floating handguards which in turn allows further customization by defining the functionality and appearance of your rifle. Also, there is the newest and shortest pistol gas system usually found on AR-15 style pistols. As for the classification, the AR-15 Handguard can be determined by the length of the piston or operation rod systems on an AR15 rifle, so we have three standard AR handguard lengths which match to gas systems with the same names: rifle, mid-length, and carbine gas systems. There are hundreds of different versions which can improve rifle's comfort, versatility, or even enhance its accuracy potential. While the primary role of a AR Handguard is to protect shooters support hand from the heat of the barrel while firing, the AR15`s sleek and stylish appearance, the AR15 standard plastic handguards are bulky and clumsy making the rest of the AR look interrupted and incomplete. Anyway, the AR-15 handguards are one part that's easy to change, and it is also one of the most-changed parts on the rifle, and for most of the novices adding an aftermarket, the forearm is the first step in personalizing their AR-15 rifle. While the aftermarket offer is overwhelmed with the plethora of them ranging from the battle-proven to the true featherweight AR-15 handguards even the names can be confusing as the rifle's forend is usually called the handguard, forearm or foregrip. Like many gun parts, the AR15 Handguard is as personal a choice as stocks, sights or pistol grips and in direct proportion with owner’s wants and needs. Binoculars, Monoculars & Spotting Scopes.For AR15/SR15 based platforms only not compatible with SR-25 variants. Heavier barrel contours may require modification to the inside of the rail. Lighter barrel profiles work best (M4 or Government contours). The rifle must have a carbine length gas system, delta ring assembly, fixed front sight/gas block, and round handguard end cap. The KAC M4 RAS is a drop-in replacement part for standard, 2-piece polymer, M4-type handguards. What sets the M4 RAS apart from other 2-piece quad rails on the market is that it securely locks to the rifle’s barrel nut via a clamp and screw arrangement, making it a very solid foundation upon which to mount tactical accessories.
AR 15 QUAD RAIL HANDGUARD UPGRADE
This handguard is a simple-to-install, drop-in upgrade that features genuine Mil-Spec M1913 Picatinny Rails along its entire length. With over 1 million rails issued to date, it is one of the most battle proven designs available for the AR15 platform. The Knights Armament M4 RAS (Rail Adapter System) was developed for use on US military M4 Carbines utilized a 14.5 or 16″ barrel. Knights RAS 7″ Drop-In AR15/M4 Carbine Length Quad Rail Description:
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