Builds/Buffer Tube

AR builds with the CMMG AR-15 MK4 Receiver Extension KIT

5 public builds on GunPartPicker use the CMMG AR-15 MK4 Receiver Extension KIT. At today's lowest prices the median parts list comes to $1,171, and most land between $681 and $1,844. The most common caliber is 5.56 NATO.

Public builds

Median parts total

$1,171

Typical range

$681 to $1,844

Top caliber

5.56 NATO

Most chosen parts in builds with the CMMG AR-15 MK4 Receiver Extension KIT

Slot	Most chosen	Share
Upper Receiver	Bravo Company Mfg Upper Receiver Assembly builds	40% of 5
Barrel	Rosco Manufacturing Bloodline 5.56 AR-15 Barrel M4 Carbine builds	40% of 5
Bolt Carrier Group	WMD Guns 5.56 AR-15 Bolt Carrier Group builds	40% of 5
Charging Handle	Aero Precision AR-15 Breach Charging Handle Ambidextrous builds	50% of 4
Stock & Brace	Magpul MOE SL-M Carbine Stock Mil-Spec OD Green builds	40% of 5
Buffer	CMMG AR-15 Carbine Buffer Assembly builds	60% of 5
Pistol Grip	CMMG AR-15 A2 Pistol Grip builds	40% of 5
Safety	Timber Creek Outdoors Ambidextrous Safety Selector builds	60% of 5
End Plate	Fortis Lightweight Enhanced AR-15 End Plate builds	40% of 5
Bolt Catch	TPS Arms AR-15 Bolt Catch Assembly builds	40% of 5
Takedown Pin	CMMG AR-15 HD Pivot and Takedown Pin Parts KIT builds	60% of 5
Buffer Spring	Aero Precision AR-15 Rifle Buffer Spring builds	75% of 4

Brands these builds pair with

Builds with the CMMG AR-15 MK4 Receiver Extension KIT

Frequently asked questions

How many builds use the CMMG AR-15 MK4 Receiver Extension KIT?

5 public builds in the GunPartPicker build gallery include the CMMG AR-15 MK4 Receiver Extension KIT.

How much does a build with the CMMG AR-15 MK4 Receiver Extension KIT cost?

The median parts list is $1,171, with most between $681 and $1,844, using each part's lowest in stock price today. Open any build for store by store prices.

What parts go with the CMMG AR-15 MK4 Receiver Extension KIT?

Bravo Company Mfg Upper Receiver Assembly is the most chosen upper receiver (40% of builds with one); Rosco Manufacturing Bloodline 5.56 AR-15 Barrel M4 Carbine is the most chosen barrel (40% of builds with one); WMD Guns 5.56 AR-15 Bolt Carrier Group is the most chosen bolt carrier group (40% of builds with one); Aero Precision AR-15 Breach Charging Handle Ambidextrous is the most chosen charging handle (50% of builds with one).

Build totals add up each part's lowest in stock price, refreshed every few hours; open a build for prices at every store. Want your own? Start an AR-15, AR-10 or AR-9 build.