Current online order processing time is one business day.

Welcome to Osage County Guns

Shopping Cart

0 items



 

Sig Sauer MCX Rattler AR15 Conversion Kit - 5.5" .300 Blackout

Be the first to review this product

Ask a question (3)

Regular Price: $1,579.99

Special Price $1,329.99

Availability: Out of stock

Quick Overview

Sig Sauer MCX Rattler AR15 Conversion Kit - 5.5" .300 Blackout

Sig Sauer MCX Rattler AR15 Conversion Kit - 5.5" .300 Blackout

Double click on above image to view full picture

Zoom Out
Zoom In

More Views

Details

This is a new OEM Sig Sauer MCX Conversion Kit that includes an MCX upper receiver, adapters to convert a standard Mil-Spec AR15 lower receiver to accept the MCX upper receiver, and a Sig Sauer two-stage trigger. The trigger installation is required to ensure proper operation of the MCX upper receiver. Using your existing trigger is not recommended and may lead to malfunction.

Sig's MCX conversion upper receivers include the necessary parts to install on an existing AR lower. That means you can essentially build your own pistol or SBR or convert an existing lower into a Rattler.

The kit includes the complete upper with 5.5" .300 Blackout barrel, bolt carrier group, buffer tube eliminator / 1913 back (for mounting a brace or stock), 1913 side folding adapter (for mounting a buffer tube for brace or stock), Sig's Match Duo 2 stage trigger, and a 1913 QD adapter. The upper ships with Sig's flip up sights too!

The Rattler has a two position gas valve for running suppressed and unsuppressed.



Note: All NFA rules apply.

Additional Information

SKU UAMCX-5B-300-BLK-TAP
UPC Code 798681587735
Caliber .300 Blackout
Manufacturer Sig Sauer
Sights (detailed) Flip-Up Sights
Frame Finish Black
Barrel Length (in) 5.5 in
Accessory Rail Yes
Warranty Warranty provided by Sig Sauer. Warranty information is available for Sig Sauer products at https://www.sigsauer.com/support/warranty/.

Product Questions

Product Questions

Does this kit come with a bcg?

Referenced product: UAMCX-5B-300-BLK-TAP

The MCX Rattler upper receiver does include the bolt carrier group. 

Rate the answer?
How soon can you get these back in stock?

Referenced product: UAMCX-5B-300-BLK-TAP

Response Date: 2-7-19

Sig has been a little slow on delivery but we hope to have these back in stock within the next month or so.

Rate the answer?
Do you have to switch triggers if it is already an MCX Virtus?

Referenced product: UAMCX-5B-300-BLK-TAP

Response Date: Jul 2, 2019

You do not have to swap the trigger if you already have a MCX Virtus.

Rate the answer?

You may also be interested in the following product(s)

Sig Sauer P226 9mm Extreme

Sig Sauer P226 9mm Extreme

Regular Price: $999.99

Special Price $799.99

Sig Sauer P226 9mm w/ Night Sights

Sig Sauer P226 9mm w/ Night Sights

$929.99
Sig Sauer MPX / MCX Telescoping & Folding Stock - Black

Sig Sauer MPX / MCX Telescoping & Folding Stock - Black

$174.99
Sig MCX Rattler SBR - 5.5" .300 Blackout

Sig MCX Rattler SBR - 5.5" .300 Blackout

$2,299.99
   

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.

Write Your Own Review

You're reviewing: Sig Sauer MCX Rattler AR15 Conversion Kit - 5.5" .300 Blackout

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars
Value
Quality
Price