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Anyone who has run a standard AR buffer setup knows the sound. That gritty, springy twang that rattles down the buffer tube and right into your cheek every time the action cycles. The JP Silent Captured Spring System (MXM47570) was built to make that go away. This is the standard weight version, machined from tungsten and stainless steel and manufactured exclusively for Maxim Defense to pair with their CQB Stock System.
Instead of a loose buffer and spring bouncing around inside your receiver extension, you get a self-contained captured assembly. The spring rides on a guide rod, which eliminates the friction and metal-on-metal scratch of a conventional setup. What you feel at the shoulder is a noticeably smoother recoil impulse. Because the spring doesn't let the buffer slam hard at the back of the stroke, that jarring bottom-out feeling gets softened, which helps keep the muzzle flatter for faster, more controlled follow-up shots.
JP Enterprises has a long-standing reputation for precision buffer systems, and this collaboration brings that engineering into the Maxim CQB platform. The standard weight tuning is well suited to typical rifle-caliber builds and gives you that quieter, refined cycling without adding unnecessary mass. It is a favorite among precision and competition folks who want less clatter and a cleaner shooting experience.
This one is specific. The JP Silent Captured Spring is designed to work with the Maxim Defense CQB Stock System, and it needs a bolt carrier group with an open channel so the guide rod can pass through as the action runs. Do not modify a standard BCG to try to make it fit. If your carrier isn't already cut for a guide rod, you'll want the correct BCG before dropping this in. Match the parts correctly and you'll have one of the smoothest, quietest buffer setups you can put behind a CQB stock.
It replaces the noise and friction of a standard buffer and spring with a self-contained captured assembly that rides on a guide rod. This eliminates the gritty twang you feel and hear through the buffer tube and gives you a smoother recoil impulse. The softer cycling helps keep your muzzle flatter for quicker follow-up shots.
No. This specific unit (MXM47570) is built exclusively for the Maxim Defense CQB Stock System, so it needs that stock to function as designed. It also requires a bolt carrier group with an open channel so the guide rod can pass through during cycling. If your setup isn't a Maxim CQB stock with a compatible BCG, this isn't the right part.
Yes. Your BCG needs an open channel at the rear so the guide rod has room to travel as the action cycles. Maxim's guidance is not to modify a standard carrier to make it work. Get a carrier that is already cut for a guide rod and you'll be set.
The standard weight is well suited for typical rifle-caliber CQB builds and gives you smooth, quiet cycling without extra mass. Maxim also offers heavy and 9mm weight versions for setups that need more buffer weight, like some suppressed or short-barreled builds. If you're unsure about your gas system and load, a knowledgeable gunsmith can help you dial in the correct weight.
| UPC | 680017475703 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MXM-47570 |
| Color | Black |
| Model | |
| Product Type | Buffer |
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