CMMG Inc. AR-15 Mk4 Complete Lower - Blue/Black, Synthetic, Collapsible Stock
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The CMMG AR-15 Mk4 Complete Lower Group with MK4 Collapsible Butt Stock is an excellent starting point for your standard AR-15 build. This will work with most standard AR-15 calibers like the 9mm Luger, .40 S&W, 5.56 NATO, .223 Remington, .300 AAC Blackout etc. Starting with a high quality component like the CMMG Mk4 Complete Lower Group with MK4 Collapsible Butt Stock gives you assurance of quality in form and function. Don't use sub par parts from some unknown manufacturer, go with a name you can trust, go with a CMMG AR-15 Mk4 Complete Lower Group with MK4 Collapsible Butt Stock.
Specifications and Features:
CMMG AR-15 Mk4 Complete Lower Group with MK4 Collapsible Butt Stock
6 Position Mil-Spec Extension
Forged 7075-T6 Aluminum
Hard Anodized Black
Single Stage Mil-Spec Trigger
A2 Pistol Grip
Standard AR-15 Safety Selector
Standard Carbine Spring and Standard Weight Carbine Buffer
Standard takedown/pivot pin holes and .155" hammer/trigger pin holes
Fits:
9mm Luger, .40 S&W, .45 ACP, 10mm Auto, 5.7x28mm, 5.56 NATO, .223 Remington, .300 AAC Blackout, .24 Ruger, 5.45x39mm, .300 Whisper, 6.5mm Grendel, 6.8 Remington SPC II, .458 SOCOM, and .50 Beowulf
Specifications and Features:
CMMG AR-15 Mk4 Complete Lower Group with MK4 Collapsible Butt Stock
6 Position Mil-Spec Extension
Forged 7075-T6 Aluminum
Hard Anodized Black
Single Stage Mil-Spec Trigger
A2 Pistol Grip
Standard AR-15 Safety Selector
Standard Carbine Spring and Standard Weight Carbine Buffer
Standard takedown/pivot pin holes and .155" hammer/trigger pin holes
Fits:
9mm Luger, .40 S&W, .45 ACP, 10mm Auto, 5.7x28mm, 5.56 NATO, .223 Remington, .300 AAC Blackout, .24 Ruger, 5.45x39mm, .300 Whisper, 6.5mm Grendel, 6.8 Remington SPC II, .458 SOCOM, and .50 Beowulf