Benelli 70130 M4 Buffer Tube Instruction Manual
- June 16, 2024
- BENELLI
Table of Contents
70130 M4 Buffer Tube
Benelli M4 Recoil Tube Installation In structions:
It is recommended that this part be installed by a qualified gunsmith. It is
one of the hardest parts to install on the Benelli M4, but with the proper
tools, techniques, and knowledge, it’s quite easy.
We are not responsible for any damages that you cause to your shotgun or
yourself. Please read all the way through one time before starting.
Recommended tools: safety glasses, heat resistant gloves, other necessary PPE,
table vice with soft jaw pads/towel, heat gun and/or propane torch or similar
torch, an adjustable wrench or a 3/4″(19mm) and a 1 1/16″ (27mm) wrench, wire
brush, internal snap ring pliers, high strength thread locker, and pointy
metal picks.
- Field strip your Benelli M4. Remove the barrel, trigger assembly, bolt, stock, etc. Use the snap ring pliers to remove the snap ring from the rear of the recoil tube.
- Unscrew the recoil tube retaining screw. It can be backed out using the snap ring pliers’ tips, or by using large flat head screwdriver. Once its flush with the recoil tube, with one hand, hold the tube and press down on the retaining screw using your thumb and rotate. It’s under tension, so don’t point it at your face.
- Set aside the tube retaining screw, recoil spring, and plunger to reuse with the new tube.
- Observe how the old recoil tube is installed in your receiver. On the inside of the receiver, the tip of the tube should be about flush with the receiver. Also see the how the tube is orientated so the collapsible stock is in line correctly with the receiver.
- Clamp the receiver down in vice moderately to where it doesn’t move but also doesn’t crack. It’s best to clamp it upside down and closer to the rear sight where its strongest.
- Get your heat gun, or a torch if your heat gun doesn’t get hot enough (500°F). The torch is much quicker but has a higher chance of damaging the anodizing on the receiver. Heat evenly around the tube, but don’t heat the receiver directly. The thread locker starts to soften at around 450-500 degrees Fahrenheit, and starts to smoke when it’s ready to turn. First unscrew the large nut and once it breaks free, use the smaller wrench on the end of the recoil tube to turn the rest of the way out. Let all parts cool for about 30-60 min before moving on.
- Use a pick(s) to remove the retaining ring from the inside of the tube.
- Clean the thread locker off the receiver and nut with a wire brush and screw nut onto new tube about 3/4th of the way. If you have collapsible stock, put it onto the tube (just the stock). Put a little bit of high strength thread locker onto the tube’s threads. Screw the tube in to where its flush in the receiver, and back out until the stock is centered with the receiver.
- Tighten the nut down without letting the stock turn. Tighten it down about 25 foot-pounds.
- Reinstall all 4 parts that you removed from your old recoil tube into your new one.
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