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308 AR Gunbuilder's Lower Parts Kit

308 AR Gunbuilder's Lower Parts Kit

CMMG · Lower Parts

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Best price

$39.99at GunMag Warehouse

In stock Lowest in 30 dayschecked Nov 10, 2026

Compare 11 stores

Where to buy

StorePriceAvailabilityBuyAdd to build
GunMag Warehouse Best price $39.99checked Nov 10, 2026 In stock Buy at GunMag Warehouse
Ammunition Depot $45.99checked Nov 10, 2026 In stock Buy at Ammunition Depot
MidwayUSA $47.99checked Nov 10, 2026 In stock Buy at MidwayUSA
Brownells $49.23checked Nov 10, 2026 In stock Buy at Brownells
OpticsPlanet $54.89Salechecked Nov 10, 2026 In stock Buy at OpticsPlanet
Battlehawk Armory $36.99Salechecked Nov 10, 2026 Check store Buy at Battlehawk Armory
Classic Firearms $39.42checked Nov 10, 2026 Check store Buy at Classic Firearms
Palmetto State Armory $43.39checked Nov 10, 2026 Check store Buy at Palmetto State Armory
CMMG $49.95checked Nov 10, 2026 Check store Buy at CMMG
AR15Discounts $49.95checked Nov 10, 2026 Check store Buy at AR15Discounts
Dirty Bird $49.95checked Nov 10, 2026 Check store Buy at Dirty Bird

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

Lowest in-stock price in the last 30 days: $39.99 at GunMag Warehouse. Dashed line = out of stock. Tracking since Sep 27, 2026.

Show the prices as a table
StoreLatestLowestHighest
AR15Discounts$49.95$49.95$49.95
Ammunition Depot$45.99$45.99$51.49
Battlehawk Armory$36.99$36.99$40.49
Brownells$49.23$49.23$49.23
CMMG$49.95$49.95$49.95
Classic Firearms$39.42$39.42$39.42
Dirty Bird$49.95$49.95$49.95
GunMag Warehouse$39.99$39.99$39.99
MidwayUSA$47.99$46.00$47.99
OpticsPlanet$54.89$51.19$54.89
Palmetto State Armory$43.39$43.39$43.89

Since Sep 27, 2026.

About this part

The 308 AR Gunbuilder's Lower Parts Kit is an AR-10 lower part from CMMG. It's sold by 11 stores (5 in stock), from $36.99 to $54.89. The lowest in-stock price in the last 30 days was $39.99 at GunMag Warehouse.

Specifications

Manufacturer
CMMG
Type
Kit
Platform
AR-10

From the manufacturer

The 308 version includes LR308 takedown and pivot pins as well as an improved bolt catch. The 308 kits also include a bolt catch screw in place of the AR-15 pin. Parts list includes: Takedown pin, receiver pivot pin, takedown pin detent (2), takedown pin detent spring (2), hammer and trigger pin (2), safety selector, selector detent, magazine catch, magazine catch spring, magazine release button, bolt catch, bolt catch plunger, bolt catch spring, bolt catch spring pin, buffer retainer and buffer retainer spring. Mfg: Cmmg

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$39.99 at GunMag Warehouse
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