RPP MAS Marlin S&W Receiver Rail — 1895 45-70, 336 30-30, 444, .450 Marlin

RPP MAS Marlin S&W Receiver Rail — 1895 45-70, 336 30-30, 444, .450 Marlin

Current Ranger Point Precision product RPP-1405, matched by exact manufacturer SKU.

Current RPP name: MAS (Modular Accessory System), previously known as Costa.

Does not fit

• MARLIN OR ROSSI 95 RIFLES

Product details

Do You Have A Mas Forearm/Rail System?

If not, then this 6" long rail is 1" longer than your receiver. You need our 5" RHINO Rail SKU 16

"Military Spec"

Does not work with "weaver spec rings/red dot mounts (e.g. Leupold)

Mas Rail System

This is the receiver rail portion of the 3 rail MAS handguard system (this rail + two gator rails that attach to the top of the MAS forearm).

6" Rail Hangs Out 1" Beyond The Receiver

FITS: Marlin and Smith & Wesson 1895 45-70, 336 30-30, 4308x and 338x, 444, and 450M rifles

Formerly Called The Costa

Now MAS (Modular Accessory System)

Overview

MAS Handguard (Modular Accessory System) — previously known as the Costa Handguard.

This 6" long lever action scope mount receiver rail works with the MAS Marlin or Smith & Wesson M-LOK Handguard + Modular Rail System. This one is drilled and tapped for the Marlin and Smith & Wesson 1895 45-70, 336 30-30 308X and 338X, 444, and 450M lever-action rifles.

Why a Three Rail Arrangement? The MAS Handguard + Rail System was designed to provide lever gun shooters with exceptional flexibility in setup and cost while safeguarding the qualities of handling and accuracy that we love about these fine firearms. In order to meet all these goals we split the top picatinny rail into 3 separate sections. The handguard can be used with all 3 picatinny top rails, none, or any combination of two. It’s worth noting that installing one or more Gator rails makes the handguard even stronger.

In order to accommodate a range of manufacturing tolerances in the host rifles, we have imbued the entire handguard/rail system with adjustable fitments. It’s important to understand that when we talk about manufacturing tolerances we are talking about a universal phenomenon. As an example, there is really no such thing as a straight barrel. Each OEM must decide for themselves how much curvature is acceptable, and it is pretty well understood that a noticeably curved barrel can still shoot well.

Our job in the aftermarket is to work with or around this range of tolerances and still achieve the desired result. In the case of tube fed lever guns whose handguards attach to the barrel, this can be a challenge, because we want everything to align with the receiver, but the barrel is not running true.

We made a deliberate decision not to use a continuous top rail in order to mitigate the effect of manufacturing tolerances on accuracy. Our past experience as custom lever gun builders taught us that accuracy generally falls off when one ties the receiver to the barrel with a continuous rail. For the same reason, we strongly advise against “bridging” the receiver rail to a Gator Rail with a single optic.