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The gas cylinder lock is one of those small parts that punches way above its size on the M1A. This is the genuine Springfield Armory OEM piece (part number MA0310), the same lock that ships on their factory rifles, built from steel with a matte blued finish that matches the rest of your front end. It threads onto the barrel and does the quiet but important work of locating the gas cylinder longitudinally, so the gas piston ends up with the right amount of clearance for the rifle to cycle the way it should.
Despite the name, this part is not about brute clamping force. Its main job is positioning. When it threads onto the barrel it bottoms against a shoulder, and the gas cylinder plug then draws the cylinder forward against the lock, setting everything in its proper spot along the barrel. Get that geometry right and your gas system seals and cycles correctly. Because of how precise that fit is, this is one part where taking your time on reassembly pays off.
This lock is made for Springfield M1A and M14 pattern rifles chambered in .308 Winchester, 7.62x51mm NATO, and 6.5 Creedmoor. That covers the popular variants including the Standard, Loaded, Scout Squad, and SOCOM builds. Since it is a direct factory component rather than an aftermarket copy, you are not fighting tolerance issues to get it to seat.
Gas cylinder locks get taken on and off during cleaning, and small threaded steel parts have a way of walking off the workbench or wearing over the years. Having a genuine replacement on hand means a lost or damaged lock never turns into a range day that ends early. Springfield recommends gas system parts be fitted by a qualified gunsmith, and given how much this piece affects timing and cycling, that is worth keeping in mind if you are new to the platform.
It threads onto the barrel and locates the gas cylinder in the correct position along its length. That positioning sets the clearance the gas piston needs for the rifle to cycle properly. It is not primarily a clamping part, its real job is holding the gas cylinder in the right spot so the gas system seals and functions the way it should.
This MA0310 lock is designed for Springfield M1A and M14 pattern rifles chambered in .308 Winchester, 7.62x51mm NATO, and 6.5 Creedmoor. That includes common variants like the Standard, Loaded, Scout Squad, and SOCOM models. Since it is a genuine factory part, it seats without the tolerance headaches you sometimes get from aftermarket copies.
Yes. This is the factory Springfield Armory component, part number MA0310, the same lock found on their production M1A rifles. It is machined from steel with a matte blued finish to match the rest of the front end.
Because this part directly affects how the gas system positions and cycles, Springfield recommends having gas system parts fitted by a qualified gunsmith. If you are comfortable working on the M1A platform and understand how the lock, plug, and cylinder work together, it is a straightforward part. When in doubt, let a gunsmith handle it to keep your timing correct.
| UPC | 706397857769 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MA0310 |
| Model |
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