HRF CONCEPTS
RCM Magwell — Milspec AR-15
The RCM, or Rifle Combat Magwell, adds a 175% increase in flared funnel surface area while keeping a slim overall profile. This version fits forged milspec AR-15 lower receivers.
Updated for 2026 with an improved injection-molded polymer material and design.
Which Lower Do You Have?
The RCM is receiver specific. Match it to your lower:
Confirmed Fitment
The RCM fits most forged milspec TDP lowers, including receivers from Aero Precision, Colt, Geissele, BCM, KAC, Daniel Defense, Palmetto State Armory including the JAKL, FN, Anderson, SOLGW, Centurion, Troy Industries, Bushmaster, Sionics, CMMG, Wilson Combat, Rock River Arms, Smith & Wesson, Ruger, Ballistic Advantage, Noveske, Springfield, and the MR556A4, among many others.
If you run into difficulty during installation, contact HRF Concepts support.
What the Funnel Does
A magazine has to find the well before it seats. The wider the opening, the more forgiving that is when your hands are cold, the light is bad, or you are not in a textbook shooting position.
The RCM works well for unconventional shooting positions, working under night vision, and reloading on the move. At 1.93 inches wide it is also PCSL compliant for competition use.
Magazine Compatibility
Works with all major magazines on the market, including M3 PMAGs, and with higher capacity options such as the Magpul D60 and Surefire MAG5-60.
Colors
Available in black, FDE, and ODG. The ODG shade sits between olive drab green and ranger green, so it blends with both.
What's Included
1x HRF Concepts RCM Milspec Magwell in your selected color
2x RCM 4-40 bolts
1x 3/32 inch hex L-key
Specifications
- Fits most forged milspec TDP AR-15 lower receivers
- 175% increase in flared funnel surface area
- Material: injection molded nylon polymer
- Weight: 0.8 oz (23 g)
- Length: 3.43 inches
- Width: 1.93 inches, PCSL compliant
- Height: 0.60 inches
- Height from inside shelf: 0.35 inches (9 mm)
- Available in black, FDE, and ODG
- Lifetime warranty, including previous versions
- Made in USA
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