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If you own a Maxim Defense CQB stock or pistol brace, sooner or later you'll want a spare buffer and spring on hand, or a way to fine tune how your gun cycles. This standard weight set from Maxim Defense does exactly that. Built from a mix of tungsten and stainless steel and finished in that recognizable silver and blue, it's a purpose made replacement part designed to work only with the CQB stock platform rather than a standard mil-spec buffer tube.
This buffer and spring combo is not a universal part. It's engineered to fit the internal geometry of the Maxim Defense CQB stock and CQB style pistol braces, so it won't drop into a regular carbine or rifle length tube. That tight tolerance fit is part of what makes the CQB stock cycle so smoothly in the first place, and this STD weight set is the same 3.3 oz configuration Maxim uses as the baseline setup on most of their stocks and braces straight from the factory.
At 3.3 oz, this standard weight is the starting point that works for the majority of 5.56 and .300 Blackout builds running a CQB stock. If your rifle is suppressed, running on the gassy side, or you're working with a select fire platform, Maxim also offers this same buffer and spring in H1, H2, and H3 weights for more reciprocating mass and a slower bolt carrier velocity. Having a spare STD set on hand also gives you a baseline to compare against if you ever start experimenting with heavier buffers down the road.
Some CQB stock owners run a JP Silent Captured Spring for the quieter cycling, but that setup requires a bolt carrier group with an open rear channel for the guide rod. This traditional buffer and spring configuration skips that requirement entirely, making it a straightforward option if your BCG isn't set up for a captured spring system, or if you just prefer the simplicity of a standard buffer and spring pairing.
No, this set is machined specifically for the Maxim Defense CQB stock and CQB style pistol braces. It will not fit or function correctly in a standard mil-spec carbine or rifle length buffer tube, so make sure you're running a Maxim CQB stock before ordering.
The 3.3 oz STD weight is what Maxim ships on most CQB stocks and braces, and it works well for the majority of standard 5.56 and .300 Blackout setups. If you're running a suppressor, an over-gassed system, or a select fire platform, you'll likely want to step up to the H1, H2, or H3 weight for smoother cycling and reduced bolt bounce.
Yes, this traditional buffer and spring setup is a solid alternative to the JP Silent Captured Spring. Unlike the JP system, it doesn't require a bolt carrier group with an open rear channel for a guide rod, so it's a simpler option if your BCG isn't machined for that.
This listing is for the buffer and spring set on its own, sold separately from the stock itself. It's a great item to keep as a spare or to swap in if you're replacing a worn spring or trying a different weight in your existing CQB stock.
| UPC | 680017475642 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MXM47564 |
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