Contains the necessary parts to complete an LR308lower receiver besides the receiver extension and butt stock. Building on the mil-spec standard, CMMG Gunbuilder’s Kits include everything you need in a new or custom lower build where you add the trigger, pistol grip and trigger guard of your choosing. Basic parts list: takedown pin, safety selector, bolt catch, receiver pivot pin, selector detent, bolt catch plunger, takedown pin detent (2), magazine catch, bolt catch spring, takedown pin detent spring (2), magazine catch spring, bolt catch screw, hammer and trigger pin (2), magazine release button, buffer retainer and buffer retainer spring. Specifications for CMMG, Inc MK3 Lower Parts Kit: Manufacturer: CMMG Color: Black Finish: Black Gun Model: CMMG Mk3 Condition: New Package Contents: CMMG, Inc MK3 Lower Parts Kit The CMMG Inc Gunbuilder’s Lower Parts Kit – MK3 38CA61A is a quality addition to the CMMG lineup. For more great deals on AR15 Lower Parts by CMMG, please browse our CMMG, Inc Gun Parts page.
6 reviews for CMMG, Inc MK3 Lower Parts Kit
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Kyle –
I ordered this kit for a build I’ve been working on. Quality of the parts seem good and everything was included to finish. Fit perfect in my 80% arms lower receiver. I highly recommend this product if you’re in the market to complete your 308 build!
Brad –
Received the kit as promised. Unfortunately the rear takedown pin was wrong. The one in the kit was .250" for an AR15. Rather than hassle with returning to Optics Planet, I called CMMG directly. Thumbs up to them for their customer service. They apologized and dropped a complete set of their HD takedown pins for AR10 in the mail. I had in just a couple of days!
Crocket –
I used this kit for a recent LR308 build – everything fit perfectly. However, the most impressive thing about this parts kit is that CMMG had the foresight to package the parts in a plastic form that holds the parts over a card with each part labelled! That simple packaging scheme saved me 20-30 minutes of sorting through parts to figure out what I have. Thank you CMMG!
Jon –
Exactly what I needed to finish my 80% lower. Had no issues what so ever mine came with and extra spring for the bolt catch pin. The cmmg video for installation is a bit lacking. Seems to function properly haven't shot the rifle yet waiting on a buffer tube
Watt –
fit and finish are great, had a threaded pin for the bolt catch. The included trigger and grip feels great and everything was package in its own color coded bag. Expected to have issues with fitment since it's a .308 platform but it all fit great.
whatitisholmes –
Used to complete an 80% DPMS, everything fit great. The bolt catch pin is threaded so make sure your lower is set up for that before you buy and you’ll be in good shape. I oiled every pin and spring as I put them in, it is an absolute must do. Cycle every takedown pin, safety selector, etc. a few times with that oil in there and it gets smooth and quiet. Can’t beat the parts for the price.