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CMMG CMMG55CA646
California Proposition 65 Warning

This product can expose you to chemicals including lead, known to cause cancer and birth defects. For more info visit P65Warnings.ca.gov.

CMMG

$99.95
Available California compliant

CMMG Rifle Length Receiver Extension/Stock Kit, For AR Rifles, Black 55CA646

Key Details
Brand CMMG
Manufacturer Part Number 55CA646
UPC 815835012636
SKU CMMG55CA646
Current Stock 26 available
Quantity Updated Apr 25, 2026 7:45 PM
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Purchase Requirements
  • Final availability is confirmed at checkout.
In-Store Pickup Required: All firearm purchases must be picked up at our Beverly Hills location after background check completion.
Product Description

Combine this CMMG AR-15 Complete A1 Style Receiver Extension/Stock Kit with your choice of lower parts kit to complete your lower group. Comes with a rifle length receiver extension tube, rifle buffer, rifle buffer spring and A1 length fixed stock.

Features
  • Kit includes- Receiver extension tube end cap" recoil spring and buffer" stock and stock screw"
Specifications
UPC: 815835012636
Manufacturer: CMMG
Manufacturer Part #: 55CA646
Type: Stock