There are other factors to consider - weight, sling sockets, overall diameter. I've never used their rails, but their triggers are sold I have used the DD RIS and Larue rails quite a bit Both are great rails There are numerous other companies making rails ( almost every rifle company has there own ) Geisselle is well received. 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. Many choices here-knights has several offerings as does DD ( current RIS offering on SOF rifles) Larue also makes a great rail. This handguard is a simple-to-install, drop-in upgrade that features genuine Mil-Spec M1913 Picatinny Rails along its entire length. I know of some surefire rails that were used and abused, and held up well. They can be found for a good price and are easily installed like standard handguards with no mods to the rifle/carbine In non free float rails, Knights RIS/RAS has been proven throughout GWOT as a capable rail system. Having said that, there are free float and non free rails systems out there. I don't know of anyone here who has tested all quad rails side by side using a dedicated and equal testing program It is not compatible with the AR15/M4E1 platform.'Best quad rail' is really subjective. *Please note – This handguard is specific to the M5. Purchased with a handguard, the M5 Barrel Nut is $20 ($40 when sold separately). If you are using our M5E1 Enhanced Upper Receiver, no additional pieces are needed. Our handguards use either the DPMS/Aero or Armalite interface and do not work with a standard barrel nut.

Make sure to select “Yes” under the Handguard Barrel Nut option above (shims included). Gen 2 Feature – New profile for the continuous picatinny top railĪre you attaching this handguard to a standard threaded upper receiver?.Gen 2 Feature – Additional milling along flats to aid with gripping and add visual appeal.Gen 2 Feature – Quick disconnect sling socket at the 3, 6 and 9 o’clock positions Top 14 Rails, Mounts & Handguards For the AK Platform 14 Rails Mounts Handguards AK platform Arsenal PR-01 Handguard Arsenal PR-01 Handguard 14 Rails Mounts.Gen 2 Feature – Eliminated the picatinny rail running the full length of the handguard, saving weight and providing a more ergonomic design in the rear gripping area.1.78″ inside barrel nut cut area diameter.1.72″ inside diameter (from barrel nut cut to forward end) fits most muzzle devices and 1.5″ suppressors.

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