Remington Military R-4 Gas Piston Carbine (GPC) Tactical AR Carbine with Proprietary Monolithic Rail System (Pics!)

Print Friendly, PDF & Email

By David Crane
defrev (at) gmail (dot) com

All photos contained in this article were taken by, and are copyrighted. owns the copyright on these photos. The photos were shot with a Canon PowerShot S90 10-megapixel digital camera (still camera with video capability).

April 18, 2010

While DefenseReview was at the Remington Defense / Remington Military Products Division (MPD) booth during SHOT Show 2010, Trevor Shaw showed us the new Remington R-4 GPC (Gas Piston Carbine), which is a gas piston/op-rod AR carbine/SBR (Short Barreled Rifle)/subcarbine that was displayed for the first time to the public at the show. Remington developed the R4 to compete for the U.S. Army M4 Carbine modification kit/upgrade contract, while the Remington ACR (Adaptive Combat Rifle) is busy competing against the FN MK16 SCAR-L (SOF Combat Assault Rifle-Light) and other carbine/rifles in the next-gen carbine competition.

The Firearm Blog actually reported on the R-4 while the show was in progress, stating that the weapon uses a proprietary gas piston/op-rod system that “is not based on the Bushmaster piston or the piston system of any other company (the company has been careful to avoid using patented technology).

The Remington R4 GPC piston-driven AR carbine/SBR utilizes the same proprietary aluminum monolithic rail system/handguard/forend rail tube as the Mil/LE version of the ACR.

Remington Military wasn’t the only company showing off a new piston AR. SIG Sauer displayed their SIG516 at SHOT, which Defense Review will cover in an upcoming article. We handled SIG 516 at the company’s booth, and shot some great hi-res photos of it, just like our photos of the Remington R-4 Gas Piston Carbine (GPC) accompanying this article.

Basically, everybody and their mother is now manufacturing a gas piston/op-rod AR carbine for the civilian market, which is great for consumers. There’s nothing better than some healthy competition to bring prices down and product quality up. The question is, how will the Remington R-4 piston system stack up against all the other piston AR systems out there (LWRC, POF, Addax Tactical/PWS, Adams Arms/Sabre Defence, SIG Sauer, Ferfrans, and Colt, to name a few)? No way to know until it gets run through the ringer.

DefenseReview’s only complaint against Remington Military Products Division is that they never returned the Grip Pod System we lent them to place on an ACR displayed at their booth for the duration of the show. We contacted Mr. Shaw about it, and he informed us that he would look into the matter for us. We’re hoping that Mr. Shaw or Scott Lester can locate it for us. It would be nice to get that back, since we actually use our Grip Pods, over here. We’ll keep our fingers crossed.

Additional Photos:

Company Contact Info:

Remington Military Products Division (MPD)
870 Remington Drive
Madison, NC 27025-0700
800-243-9700 Ext. 8796 Office
366-548-7800 Fax

Gregory Baradat
MSG (R) USSF  –  Manager – Military Products Division
(P) 253.503.7129
(P) 253.380.2850
(F) 253.267.5165

Corey Nissen
SSG U.S. ARMY 11B3VB4  –  Military Products Representative
(P) 706.610.7021
(P) 706.662.2716
(F) 706.610.7021


Donna Watkins
800-852-7634 Office

© Copyright 2010 All rights reserved. This material may not be published, broadcast, rewritten or redistributed without receiving permission and providing proper credit and appropriate links.

Remington Military R-4 Gas Piston Carbine (GPC) Tactical AR Carbine with Proprietary Monolithic Rail System (Pics!) by

About David Crane

David Crane started publishing online in 2001. Since that time, governments, military organizations, Special Operators (i.e. professional trigger pullers), agencies, and civilian tactical shooters the world over have come to depend on Defense Review as the authoritative source of news and information on "the latest and greatest" in the field of military defense and tactical technology and hardware, including tactical firearms, ammunition, equipment, gear, and training.

Check Also

Ryker Grip: A ‘Patent-Pending, Biomechanically Optimized Shooting Method’ for Your Tactical AR-15 or AK Carbine/SBR

By Toby Melville March 25, 2024 From time to time, an individual assesses the status …