A carbine stock looks simple, but its receiver extension and latch determine how many positions you get and how it goes on. The third video in the Gun Websites AR15 Stocks series shows how it works.
The parts
- A receiver extension that holds the spring, a buffer that rides between the spring and the bolt carrier, and the stock.
- A rifle setup uses a rifle buffer, rifle spring, rifle receiver extension and rifle stock. A carbine setup uses carbine versions of each.
Two, four or six positions
- Carbine receiver extensions come in two-, four- and six-position versions, with that many holes along the bottom.
- A spring-loaded pin in the stock engages one of those holes to set the length.
Installing and adjusting
- To adjust: push the latch up. The pin retracts slightly, and the stock slides to the next hole.
- To install or remove: pull the latch down. The pin retracts all the way so the stock can slide on or off the tube.
Buying tip
- Match the stock to the receiver extension diameter, mil-spec or commercial, and choose a tube with the number of positions you want.
More
- See the AR15 Stock and Receiver Extension pages, and AR-15 Rifle Stocks.
Based on a video from the Gun Websites YouTube channel. New to the AR-15? Start with Where To Start.