ARCA Rail help

[Chief_Rick]

I am looking for an ARCA rail to put on an Armalite upper.

There are five screw holes on the bottom of the handguard, spaced at 1.5 inches.

Looks like an 8 inch Arca rail will extend slightly beyond the gas block. A 6 inch rail may be a better choice due to the step at the rear of the handguard.

 

[akmike47]

I don’t really see any questions here so…I’d just replace the hand guard with an mlok and get an mlok rail or use something like this https://ads.midwayusa.com/product/1...MIz8b0mbz7jAMVWSvUAR0nIwa4EAQYASABEgLdO_D_BwE

 

[Rob01]

I’d go 8”. A little overhang hurts nothing and will allow longer footprint. I used some cheap Amazon mlok arca rails, two 9”, on my 6ARC. Works great. If replacing the forend is a possibility I’d do that but if not then get the rail and make it work with the screw holes.

 

[blackblue]

If you don't want to change your handguard sokek could probably make you one.

 

[Chief_Rick]

I’d go 8”. A little overhang hurts nothing and will allow longer footprint. I used some cheap Amazon mlok arca rails, two 9”, on my 6ARC. Works great. If replacing the forend is a possibility I’d do that but if not then get the rail and make it work with the screw holes.

View attachment 8675025

I'd prefer to not replace the hand guard, at least not yet. The holes on the bottom of the factory hand guard are spaced 1.5 inches apart and threaded 1/4-20.

I'd ideally like to find a piece of rail with holes spaced 1.5 inches apart instead of large open slots.

I've found several universal rails, but the ones with holes don't specify the spacing.

 

[Rob01]

Break out the drill and make them have holes where you need them.

 

[sheepdog697]

Have you completely ruled out a new rail with an integrated arca?.... lots of good options

 

[Jadazu]

Full Length Arca Rail for PRI Rifle Length Handguards

FDE Restock ETA Late April 2025. Full length Arca rail for Precision Reflex Gen II & III Rifle Length (12.5 in) handguards. This rail was designed and produced with the idea of bringing the MK12 Mod 0 and Mod H into the modern precision shooting world of arca rail integrated chassis and...

lrtmfg.com

Maybe this, even if you have to drill new holes in the rail…

 

[Rob01]

Something like this is cheap and plenty of slots.

Amazon 8” Arca