- Receiver Extension - Mil-Spec, 6 position (machined from 7075T6)
- Receiver End Plate
- Lock Nut (Castle) M4
- Carbine Action Spring
- Carbine Buffer Assembly (options for Std, H, H2, or H3)
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Fit and finish looks good. I’ve installed several and compared to other brands, I like BCM’s buffer system better. I like the H2 buffers on home builds because it helps with the common overgassing I’ve experienced.
Well made Receiver Extension. Fairly snug/secure fit with the 3 top branded stocks I've tried on the tube. Settled with a B5 stock - works well with this BCM tube.
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Excellant quality. Fits like a glove and will be a quality upgrade for my M4.
Fast shipping, got my parts in no time. Every thing was better than expected and fit perfect.