Tighten the extension tube with about 35 foot-pounds of force. Once the tube is installed, you can just slide the new buttstock into place. Before pushing all the way to the receiver body, make sure the takedown pin spring is properly in place.
Full Answer
What is the best buttstock and buffer tube for AR-15?
The new, Collapsible Buttstock and Buffer Tube for AR-15 R is a complete mil-spec stock & buffer kit, with a 6 position adjustable stock! Make the best of your build with the new Collapsible Buttstock and Buffer Tube for AR-15 Rim/Edge!
How to remove a buffer tube from a rifle?
While loosening the nut, keep a firm hold on the receiver lock plate (the washer between the nut and your rifle) to keep the detent pin contained. After loosening the nut, you can slide the lock plate back to remove the spring and detach the buttstock. 3. Remove the Buffer Tube With the stock removed, your buffer tube is ready for removal.
What is the function of the buffer tube?
The buffer tube (AKA receiver extension tube), serves two purposes. 1) It allows the user to attach a stock to the rifle. 2) It encapsulates the buffer and buffer spring, letting the bolt carrier ride back and forth to eject the spent brass and load the next round.
What should I look for when buying buffer tubes?
Be wary of cheap buffer tubes, as the threads can crack and round over when the castle nut is tightened, throwing your stock off center. Additional features can be found on certain buffer tubes.
Buttstock Installation
Before we get into the actual steps of installation, let’s talk a bit about the selections we’ve made on parts here and why we recommend them.
Assembly Instructions
Thread the Castle Nut onto the Receiver Extension Tube with the Cuts facing aft.
Series Navigation
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Discussion
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How to remove buffer tube?
Be sure your workspace is clean and large enough for you to work comfortably. 1. Remove the Buffer and Buffer Spring .
What is between the buttstock and receiver?
Between the buttstock and receiver is the detent spring and detent — tiny pieces that can quickly get away from you if you aren't careful. When removing your buttstock, you'll want to maintain some pressure on the spring until you're ready to catch it and put it aside.
How to remove a collapsible buttstock?
Collapsible buttstocks: To remove a collapsible stock, you will need a castle nut wrench or an armorer's tool . Instead of a screw, you will use your wrench to unscrew the castle nut — a large nut located where the stock joins the lower. While loosening the nut, keep a firm hold on the receiver lock plate (the washer between the nut and your rifle) ...
How does a bolt work when you fire a rifle?
When you fire, the bolt drives the buffer and spring into the buffer tube to absorb recoil. That spring then pushes the BCG back into place to seat the next round. If you plan to change the length of your buttstock, switch from a fixed to a collapsible buttstock, install a sling adapter or replace your factory components to improve performance, ...
What is a buffer tube rifle?
Rifle buffer tubes are very basic when compared next to a carbine or pistol tube. The rifle tubes are longer and don't have a slot for an end plate, which are not used with rifle length, fixed stocks. The stock will secure the rear take down spring once it is installed.
Can you use a short barreled upper receiver on an unregistered lower receiver?
When using a barrel shorter than 16", you must either have a registered lower receiver or a lower that has been converted to a pistol. Using a short barreled upper receiver on an unregistered lower receiver with a rifle stock is against the law. Since some people don't want to go through the hassle of registering with the ATF and paying the $200 tax, the next best option is to get a pistol lower receiver.
Buttstock Installation
Parts Needed
Tools Needed
Assembly Instructions
- Thread the Castle Nut onto the Receiver Extension Tube with the Cuts facing aft.
- Place the Receiver End Plate, in this case a SLAP plate, on the Receiver Extension with the raised area facing forward.
- Thread the Receiver Extension Tube through the back of the Lower Receiver, stop just before the Buffer Retainer hole.
- Thread the Castle Nut onto the Receiver Extension Tube with the Cuts facing aft.
- Place the Receiver End Plate, in this case a SLAP plate, on the Receiver Extension with the raised area facing forward.
- Thread the Receiver Extension Tube through the back of the Lower Receiver, stop just before the Buffer Retainer hole.
- Insert the Buffer Retainer Spring and Buffer Retainer into the hole and depress the corner of the retainer with your index finger.
Remove The Buffer and Buffer Spring
- After breaking your gun down into the upper and lower receivers, look at your lower. All AR-15s have buffers and buffer springs loaded into the buffer tube, and those parts need to come out before you disassemble your buttstock. To remove them, push the buffer slightly into the stock to release the tension on the retaining pin that holds it in plac...
Remove The Buttstock
- Between the buttstock and receiver is the detent spring and detent — tiny pieces that can quickly get away from you if you aren't careful. When removing your buttstock, you'll want to maintain some pressure on the spring until you're ready to catch it and put it aside. The steps for stock removal depend on whether you have a fixed or positionable setup: 1. Fixed buttstocks: If you ha…
Remove The Buffer Tube
- With the stock removed, your buffer tube is ready for removal. Get a firm grip, loosen yours by hand and that's it. When replacing a buffer tube, first check whether your lower uses commercial or Mil-Spec components — military buffer tubes measure 1.146" where the stock slides on, while commercial tubes measure 1.170". Your stock and buffer tube must be of the same variety for p…