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BRASS GOAT COMPATIBILITY CHECKER

Semi-Automatic Rifle Types

Select your rifle platform

  • AR - 15
  • AR - 10
*If you have both, you can later check if the other one is also compatible.

BG15 - AR15 PLATFORM

Step 1: Assess Your AR15 Lower Receiver

BG15 is only compatible with milspec lower receivers
  • Right View
  • Front View

Right view characteristics to look for:

  • Raised fence along the perimeter of the magwell face
  • Smooth face
  • Milspec magwells have a side dimension of 2.618 inches

Front view characteristics to look for:

  • Smooth face
  • Milspec magwells have a front dimension of 1.102 inches

BG15 - AR15 PLATFORM

Step 2: Assess Your AR15 Upper Receiver

BG15 is only compatible with right-hand ejection upper receivers, that are not belt-fed

BG15 - AR15 PLATFORM

Step 3: Assess Your AR15 Cartridge

BG15 is compatible with these AR15 platform cartridges
  • .17 Remington
  • 5.56mm
  • .204 Ruger
  • 6.5 Grendel
  • .22 Nosler
  • 6.8 SPC
  • 223 Remington
  • 7.62 X 39mm
  • .224 Valkyrie
  • 300 Blackout
  • 350 Legend
  • .458 Socom
  • 450 Bushmaster
  • .50 Beowulf
  • .22 Long Rifle – available with S&W Option Brass Goat

BG15 - AR15 PLATFORM

Step 4: Assess Your AR15 Accessories

Compatible Accessories

  • Extended mag release
  • Magpul BAD lever
  • Suppressors

May Require Modification

  • Extended take down pins
  • Oversized Optic Mounting Hardware

Incompatible Accessories

  • Side charging upper receiver
  • Drum Magazine

BG10 - AR10 PLATFORM

Step 1: Assess Your AR10 Lower Receiver

BG10 is manufactured to fit a variety of lower receivers

The BG10 includes 5 different-sized removable shims that are used to allow for the differences in the dimensions of the lower receiver. Click the arrows below to see which manufacturer is compatible with each shim. Shims may be compatible with firearms that are not listed.

  • Compatible firearms

    • Knight Armament AR10
    • Palmetto PA-10
    • Smith & Wesson**
    • Springfield Victor Saint

  • Compatible firearms

    • Armalite AR10 A4
    • CMMG Resolute MK3
    • DPMS DR-10
    • Live Free AR10
    • Savage MSR10**
    • POF AR10

  • Compatible firearms

    • Anderson AM-10
    • HM Defense HM-10
    • Daniel Defense 005**
    • Diamondback DB10**
    • LWRC REPR**
    • Windham WW308**
    • Remington R25
    • Bear Creek Arsenal
    • Ruger Model SR 762**

  • Compatibility not determined yet. If this shim works for your firearm, we want to hear from you!

  • Compatible firearms

    • Aero M5
No shim required for the FN Scar-17 and Sig Sauer 716

**Denotes that modifications will need to be made to the Brass Goat. Please Click here for more information.

BG10 - AR10 PLATFORM

Step 2: Assess Your AR10 Cartridge

BG10 is compatible with any AR10 platform cartridge, which includes:
  • .17
  • .260 Remington
  • .243
  • .338 Federal
  • .308
  • 6.5 Creedmor
  • .22-50
  • 6mm Remington

BG10 - AR10 PLATFORM

Step 3: Assess Your AR10 Accessories

Compatible Accessories

  • Extended mag release
  • Magpul BAD lever
  • Suppressors

May Require Modification

  • Extended take down pins
  • Oversized Optic Mounting Hardware
Some models may require BG10 modifications. Please visit this page for more information.